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9fe4d26c59
yap-6.3/C/index.c
vsc 3715f1b1d7 fix bug with very large integers 
fix bug where indexing code was looking at code after a cut.


git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1513 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2006-01-16 02:57:52 +00:00

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/*************************************************************************
* *
* Yap Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: index.c *
* comments: Indexing a Prolog predicate *
* *
* Last rev: $Date: 2006-01-16 02:57:51 $,$Author: vsc $ *
* $Log: not supported by cvs2svn $
* Revision 1.150 2005/12/23 00:20:13 vsc
* updates to gprof
* support for __POWER__
* Try to saveregs before longjmp.
*
* Revision 1.149 2005/12/17 03:25:39 vsc
* major changes to support online event-based profiling
* improve error discovery and restart on scanner.
*
* Revision 1.148 2005/11/24 15:33:52 tiagosoares
* removed some compilation warnings related to the cut-c code
*
* Revision 1.147 2005/11/18 18:48:52 tiagosoares
* support for executing c code when a cut occurs
*
* Revision 1.146 2005/10/29 02:21:47 vsc
* people should be able to disable indexing.
*
* Revision 1.145 2005/09/08 22:06:44 rslopes
* BEAM for YAP update...
*
* Revision 1.144 2005/08/17 18:48:35 vsc
* fix bug in processing overflows of expand_clauses.
*
* Revision 1.143 2005/08/02 03:09:50 vsc
* fix debugger to do well nonsource predicates.
*
* Revision 1.142 2005/08/01 15:40:37 ricroc
* TABLING NEW: better support for incomplete tabling
*
* Revision 1.141 2005/07/19 16:54:20 rslopes
* fix for older compilers...
*
* Revision 1.140 2005/07/18 17:41:16 vsc
* Yap should respect single argument indexing.
*
* Revision 1.139 2005/07/06 19:33:53 ricroc
* TABLING: answers for completed calls can now be obtained by loading (new option) or executing (default) them from the trie data structure.
*
* Revision 1.138 2005/07/05 18:32:32 vsc
* ifix some wierd cases in indexing code:
* would not look at next argument
* problem with pvar as last clause (R Camacho).
*
* Revision 1.137 2005/06/04 07:27:34 ricroc
* long int support for tabling
*
* Revision 1.136 2005/06/03 08:26:32 ricroc
* float support for tabling
*
* Revision 1.135 2005/06/01 20:25:23 vsc
* == and \= should not need a choice-point in ->
*
* Revision 1.134 2005/06/01 16:42:30 vsc
* put switch_list_nl back
*
* Revision 1.133 2005/06/01 14:02:50 vsc
* get_rid of try_me?, retry_me? and trust_me? instructions: they are not
* significantly used nowadays.
*
* Revision 1.132 2005/05/31 20:04:17 vsc
* fix cleanup of expand_clauses: make sure we have everything with NULL afterwards.
*
* Revision 1.131 2005/05/31 19:42:27 vsc
* insert some more slack for indices in LU
* Use doubly linked list for LU indices so that updating is less cumbersome.
*
* Revision 1.130 2005/05/31 04:46:06 vsc
* fix expand_index on tabled code.
*
* Revision 1.129 2005/05/31 02:15:53 vsc
* fix SYSTEM_ERROR messages
*
* Revision 1.128 2005/05/30 05:26:49 vsc
* fix tabling
* allow atom gc again for now.
*
* Revision 1.127 2005/05/27 21:44:00 vsc
* Don't try to mess with sequences that don't end with a trust.
* A fix for the atom garbage collector actually ignore floats ;-).
*
* Revision 1.126 2005/05/25 18:58:37 vsc
* fix another bug in nth_instance, thanks to Pat Caldon
*
* Revision 1.125 2005/04/28 14:50:45 vsc
* clause should always deref before testing type
*
* Revision 1.124 2005/04/27 20:09:25 vsc
* indexing code could get confused with suspension points
* some further improvements on oveflow handling
* fix paths in Java makefile
* changs to support gibbs sampling in CLP(BN)
*
* Revision 1.123 2005/04/21 13:53:05 vsc
* fix bug with (var(X) -> being interpreted as var(X) by indexing code
*
* Revision 1.122 2005/04/10 04:01:12 vsc
* bug fixes, I hope!
*
* Revision 1.121 2005/04/07 17:48:54 ricroc
* Adding tabling support for mixed strategy evaluation (batched and local scheduling)
* UPDATE: compilation flags -DTABLING_BATCHED_SCHEDULING and -DTABLING_LOCAL_SCHEDULING removed. To support tabling use -DTABLING in the Makefile or --enable-tabling in configure.
* NEW: yap_flag(tabling_mode,MODE) changes the tabling execution mode of all tabled predicates to MODE (batched, local or default).
* NEW: tabling_mode(PRED,MODE) changes the default tabling execution mode of predicate PRED to MODE (batched or local).
*
* Revision 1.120 2005/03/15 18:29:23 vsc
* fix GPL
* fix idb: stuff in coroutines.
*
* Revision 1.119 2005/03/04 20:30:12 ricroc
* bug fixes for YapTab support
*
* Revision 1.118 2005/03/01 22:25:08 vsc
* fix pruning bug
* make DL_MALLOC less enthusiastic about walking through buckets.
*
* Revision 1.117 2005/02/25 00:09:06 vsc
* fix fix, otherwise I'd remove two choice-points :-(.
*
* Revision 1.116 2005/02/24 21:46:39 vsc
* Improve error handling routine, trying to make it more robust.
* Improve hole handling in stack expansion
* Clause interrpeter was supposed to prune _trust_me
* Wrong messages for acos and atanh
*
* Revision 1.115 2005/02/21 16:50:00 vsc
* amd64 fixes
* library fixes
*
* Revision 1.114 2005/01/28 23:14:36 vsc
* move to Yap-4.5.7
* Fix clause size
*
* Revision 1.113 2005/01/15 05:21:36 vsc
* fix bug in clause emulator
*
* Revision 1.112 2004/12/28 22:20:35 vsc
* some extra bug fixes for trail overflows: some cannot be recovered that easily,
* some can.
*
* Revision 1.111 2004/12/21 17:17:15 vsc
* miscounting of variable-only clauses in groups might lead to bug in indexing
* code.
*
* Revision 1.110 2004/12/06 04:50:22 vsc
* fix bug in removing first clause of a try sequence (lu preds)
*
* Revision 1.109 2004/12/05 05:01:24 vsc
* try to reduce overheads when running with goal expansion enabled.
* CLPBN fixes
* Handle overflows when allocating big clauses properly.
*
* Revision 1.108 2004/11/19 22:08:42 vsc
* replace SYSTEM_ERROR by out OUT_OF_WHATEVER_ERROR whenever appropriate.
*
* Revision 1.107 2004/11/19 17:14:14 vsc
* a few fixes for 64 bit compiling.
*
* Revision 1.106 2004/11/18 22:32:36 vsc
* fix situation where we might assume nonextsing double initialisation of C predicates (use
* Hidden Pred Flag).
* $host_type was double initialised.
*
* Revision 1.105 2004/11/04 18:22:32 vsc
* don't ever use memory that has been freed (that was done by LU).
* generic fixes for WIN32 libraries
*
* Revision 1.104 2004/10/27 15:56:33 vsc
* bug fixes on memory overflows and on clauses :- fail being ignored by clause.
*
* Revision 1.103 2004/10/22 16:53:19 vsc
* bug fixes
*
* Revision 1.102 2004/10/04 18:56:19 vsc
* fixes for thread support
* fix indexing bug (serious)
*
* Revision 1.101 2004/09/30 21:37:41 vsc
* fixes for thread support
*
* Revision 1.100 2004/09/30 19:51:54 vsc
* fix overflow from within clause/2
*
* Revision 1.99 2004/09/27 20:45:03 vsc
* Mega clauses
* Fixes to sizeof(expand_clauses) which was being overestimated
* Fixes to profiling+indexing
* Fixes to reallocation of memory after restoring
* Make sure all clauses, even for C, end in _Ystop
* Don't reuse space for Streams
* Fix Stream_F on StreaNo+1
*
* Revision 1.98 2004/09/14 03:30:06 vsc
* make sure that condor version always grows trail!
*
* Revision 1.97 2004/09/03 03:11:09 vsc
* memory management fixes
*
* Revision 1.96 2004/08/27 20:18:52 vsc
* more small fixes
*
* Revision 1.95 2004/08/11 16:14:52 vsc
* whole lot of fixes:
* - memory leak in indexing
* - memory management in WIN32 now supports holes
* - extend Yap interface, more support for SWI-Interface
* - new predicate mktime in system
* - buffer console I/O in WIN32
*
* Revision 1.94 2004/07/29 18:15:18 vsc
* fix severe bug in indexing of floating point numbers
*
* Revision 1.93 2004/07/23 19:01:14 vsc
* fix bad ref count in expand_clauses when copying indexing block
*
* Revision 1.92 2004/06/29 19:04:42 vsc
* fix multithreaded version
* include new version of Ricardo's profiler
* new predicat atomic_concat
* allow multithreaded-debugging
* small fixes
*
* Revision 1.91 2004/06/17 22:07:23 vsc
* bad bug in indexing code.
*
* Revision 1.90 2004/04/29 03:44:04 vsc
* fix bad suspended clause counter
*
* Revision 1.89 2004/04/27 15:03:43 vsc
* more fixes for expand_clauses
*
* Revision 1.88 2004/04/22 03:24:17 vsc
* trust_logical should protect the last clause, otherwise it cannot
* jump there.
*
* Revision 1.87 2004/04/21 04:01:53 vsc
* fix bad ordering when inserting second clause
*
* Revision 1.86 2004/04/20 22:08:23 vsc
* fixes for corourining
*
* Revision 1.85 2004/04/16 19:27:31 vsc
* more bug fixes
*
* Revision 1.84 2004/04/14 19:10:38 vsc
* expand_clauses: keep a list of clauses to expand
* fix new trail scheme for multi-assignment variables
*
* Revision 1.83 2004/04/07 22:04:04 vsc
* fix memory leaks
*
* Revision 1.82 2004/03/31 01:02:18 vsc
* if number of left-over < 1/5 keep list of clauses to expand around
* fix call to stack expander
*
* Revision 1.81 2004/03/25 02:19:10 pmoura
* Removed debugging line to allow compilation.
*
* Revision 1.80 2004/03/19 11:35:42 vsc
* trim_trail for default machine
* be more aggressive about try-retry-trust chains.
* - handle cases where block starts with a wait
* - don't use _killed instructions, just let the thing rot by itself.
* *
* *
*************************************************************************/
#ifdef SCCS
static char SccsId[] = "%W% %G%";
#endif
/*
* This file compiles and removes the indexation code for the prolog compiler
*
* Some remarks: *try_me always point to inside the code;
* try always points to outside
*
Algorithm:
- fetch info on all clauses
- if #clauses =1 return
- compute groups:
seq of variable only clauses
seq: of one or more type instructions
bound clauses
- sort group
- select constant
--> type instructions
--> count constants
--> switch
for all arguments:
select new argument
*/
#include "absmi.h"
#include "compile.h"
#include "index.h"
#ifdef DEBUG
#include "yapio.h"
#endif
#ifndef NULL
#define NULL (void *)0
#endif
#if HAVE_STRING_H
#include <string.h>
#endif
#ifdef CUT_C
#include "cut_c.h"
#endif
UInt STATIC_PROTO(do_index, (ClauseDef *,ClauseDef *,struct intermediates *,UInt,UInt,int,int,CELL *));
UInt STATIC_PROTO(do_compound_index, (ClauseDef *,ClauseDef *,Term *t,struct intermediates *,UInt,UInt,UInt,UInt,int,int,int,CELL *,int));
UInt STATIC_PROTO(do_dbref_index, (ClauseDef *,ClauseDef *,Term,struct intermediates *,UInt,UInt,int,int,CELL *));
UInt STATIC_PROTO(do_blob_index, (ClauseDef *,ClauseDef *,Term,struct intermediates *,UInt,UInt,int,int,CELL *));
static UInt labelno;
static UInt
cleanup_sw_on_clauses(CELL larg, UInt sz, OPCODE ecls)
{
if (larg & 1) {
return sz;
} else {
yamop *xp = (yamop *)larg;
if (xp->opc == ecls) {
if (xp->u.sp.s3 == 1) {
UInt nsz = sz + (UInt)(NEXTOP((yamop *)NULL,sp))+xp->u.sp.s1*sizeof(yamop *);
LOCK(ExpandClausesListLock);
if (ExpandClausesFirst == xp)
ExpandClausesFirst = xp->u.sp.snext;
if (ExpandClausesLast == xp) {
ExpandClausesLast = xp->u.sp.sprev;
}
if (xp->u.sp.sprev) {
xp->u.sp.sprev->u.sp.snext = xp->u.sp.snext;
}
if (xp->u.sp.snext) {
xp->u.sp.snext->u.sp.sprev = xp->u.sp.sprev;
}
UNLOCK(ExpandClausesListLock);
#if DEBUG
Yap_expand_clauses_sz -= (UInt)(NEXTOP((yamop *)NULL,sp))+xp->u.sp.s1*sizeof(yamop *);
#endif
Yap_FreeCodeSpace((char *)xp);
return nsz;
} else {
xp->u.sp.s3--;
return sz;
}
} else {
return sz;
}
}
}
static UInt
recover_from_failed_susp_on_cls(struct intermediates *cint, UInt sz)
{
/* we have to recover all allocated blocks,
just follow the code through. */
struct PSEUDO *cpc = cint->CodeStart;
OPCODE ecls = Yap_opcode(_expand_clauses);
UInt log_upd_pred = cint->CurrentPred->PredFlags & LogUpdatePredFlag;
while (cpc) {
switch(cpc->op) {
case jump_v_op:
case jump_nv_op:
sz = cleanup_sw_on_clauses(cpc->rnd1, sz, ecls);
break;
case switch_on_type_op:
{
TypeSwitch *type_sw = (TypeSwitch *)(cpc->arnds);
sz = cleanup_sw_on_clauses(type_sw->PairEntry, sz, ecls);
sz = cleanup_sw_on_clauses(type_sw->ConstEntry, sz, ecls);
sz = cleanup_sw_on_clauses(type_sw->FuncEntry, sz, ecls);
sz = cleanup_sw_on_clauses(type_sw->VarEntry, sz, ecls);
}
break;
case switch_c_op:
case if_c_op:
{
AtomSwiEntry *target = (AtomSwiEntry *)(cpc->rnd2);
int cases = cpc->rnd1, i;
for (i = 0; i < cases; i++) {
sz = cleanup_sw_on_clauses(target[i].Label, sz, ecls);
}
if (log_upd_pred) {
LogUpdIndex *lcl = ClauseCodeToLogUpdIndex(cpc->rnd2);
sz += sizeof(LogUpdIndex)+cases*sizeof(AtomSwiEntry);
Yap_FreeCodeSpace((char *)lcl);
} else {
StaticIndex *scl = ClauseCodeToStaticIndex(cpc->rnd2);
sz += sizeof(StaticIndex)+cases*sizeof(AtomSwiEntry);
Yap_FreeCodeSpace((char *)scl);
}
}
break;
case switch_f_op:
case if_f_op:
{
FuncSwiEntry *target = (FuncSwiEntry *)(cpc->rnd2);
int cases = cpc->rnd1, i;
for (i = 0; i < cases; i++) {
sz = cleanup_sw_on_clauses(target[i].Label, sz, ecls);
}
if (log_upd_pred) {
LogUpdIndex *lcl = ClauseCodeToLogUpdIndex(cpc->rnd2);
sz += sizeof(LogUpdIndex)+cases*sizeof(FuncSwiEntry);
Yap_FreeCodeSpace((char *)lcl);
} else {
StaticIndex *scl = ClauseCodeToStaticIndex(cpc->rnd2);
sz += sizeof(StaticIndex)+cases*sizeof(FuncSwiEntry);
Yap_FreeCodeSpace((char *)scl);
}
}
break;
default:
break;
}
cpc = cpc->nextInst;
}
return sz;
}
static inline int
smaller(Term t1, Term t2)
{
CELL tg1 = TagOf(t1), tg2 = TagOf(t2);
if (tg1 == tg2) {
return t1 < t2;
} else
return tg1 < tg2;
}
static inline int
smaller_or_eq(Term t1, Term t2)
{
CELL tg1 = TagOf(t1), tg2 = TagOf(t2);
if (tg1 == tg2) {
return t1 <= t2;
} else
return tg1 < tg2;
}
static inline void
clcpy(ClauseDef *d, ClauseDef *s)
{
memcpy((void *)d, (void *)s, sizeof(ClauseDef));
}
static void
insort(ClauseDef base[], CELL *p, CELL *q, int my_p)
{
CELL *j;
if (my_p) {
p[1] = p[0];
for (j = p; j < q; j += 2) {
Term key;
Int off = *j;
CELL *i;
key = base[off].Tag;
i = j+1;
/* we are at offset 1 */
while (i > p+1 && smaller(key,base[i[-2]].Tag)) {
i[0] = i[-2];
i -= 2;
}
i[0] = off;
}
} else {
for (j = p+2; j < q; j += 2) {
Term key;
Int off = *j;
CELL *i;
key = base[off].Tag;
i = j;
/* we are at offset 1 */
while (i > p && smaller(key,base[i[-2]].Tag)) {
i[0] = i[-2];
i -= 2;
}
i[0] = off;
}
}
}
/* copy to a new list of terms */
static
void msort(ClauseDef *base, CELL *pt, Int size, int my_p)
{
if (size > 2) {
Int half_size = size / 2;
CELL *pt_left, *pt_right, *end_pt, *end_pt_left;
int left_p, right_p;
if (size < 50) {
insort(base, pt, pt+2*size, my_p);
return;
}
pt_right = pt + half_size*2;
left_p = my_p^1;
right_p = my_p;
msort(base, pt, half_size, left_p);
msort(base, pt_right, size-half_size, right_p);
/* now implement a simple merge routine */
/* pointer to after the end of the list */
end_pt = pt + 2*size;
/* pointer to the element after the last element to the left */
end_pt_left = pt+half_size*2;
/* where is left list */
pt_left = pt+left_p;
/* where is right list */
pt_right += right_p;
/* where is new list */
pt += my_p;
/* while there are elements in the left or right vector do compares */
while (pt_left < end_pt_left && pt_right < end_pt) {
/* if the element to the left is larger than the one to the right */
if (smaller_or_eq(base[pt_left[0]].Tag, base[pt_right[0]].Tag)) {
/* copy the one to the left */
pt[0] = pt_left[0];
/* and avance the two pointers */
pt += 2;
pt_left += 2;
} else {
/* otherwise, copy the one to the right */
pt[0] = pt_right[0];
pt += 2;
pt_right += 2;
}
}
/* if any elements were left in the left vector just copy them */
while (pt_left < end_pt_left) {
pt[0] = pt_left[0];
pt += 2;
pt_left += 2;
}
/* if any elements were left in the right vector
and they are in the wrong place, just copy them */
if (my_p != right_p) {
while(pt_right < end_pt) {
pt[0] = pt_right[0];
pt += 2;
pt_right += 2;
}
}
} else {
if (size > 1 && smaller(base[pt[2]].Tag,base[pt[0]].Tag)) {
CELL t = pt[2];
pt[2+my_p] = pt[0];
pt[my_p] = t;
} else if (my_p) {
pt[1] = pt[0];
if (size > 1)
pt[3] = pt[2];
}
}
}
static void
copy_back(ClauseDef *dest, CELL *pt, int max) {
/* first need to say that we had no need to make a copy */
int i;
CELL *tmp = pt;
for (i=0; i < max; i++) {
if (*tmp != i) {
ClauseDef cl;
int j = i;
CELL *pnt = tmp;
/* found a chain */
/* make a backup copy */
clcpy(&cl, dest+i);
do {
/* follow the chain */
int k = *pnt;
*pnt = j;
/* printf("i=%d, k = %d, j = %d\n",i,j,k); */
if (k == i) {
clcpy(dest+j, &cl);
break;
} else {
clcpy(dest+j, dest+k);
}
pnt = pt+2*k;
j = k;
} while (TRUE);
}
/* we don't need to do swap */
tmp += 2;
}
}
/* sort a group of clauses by using their tags */
static void
sort_group(GroupDef *grp, CELL *top, struct intermediates *cint)
{
int max = (grp->LastClause-grp->FirstClause)+1, i;
CELL *pt = top;
while (top+2*max > (CELL *)Yap_TrailTop) {
#if USE_SYSTEM_MALLOC
Yap_Error_Size = 2*max*sizeof(CELL);
/* grow stack */
save_machine_regs();
longjmp(cint->CompilerBotch,4);
#else
if (!Yap_growtrail(2*max*CellSize, TRUE)) {
save_machine_regs();
longjmp(cint->CompilerBotch,4);
return;
}
#endif
}
/* initialise vector */
for (i=0; i < max; i++) {
*pt = i;
pt += 2;
}
#define M_EVEN 0
msort(grp->FirstClause, top, max, M_EVEN);
copy_back(grp->FirstClause, top, max);
}
/* add copy to register stack for original reg */
static int
add_regcopy(wamreg regs[MAX_REG_COPIES], int regs_count, wamreg copy)
{
if (regs_count == MAX_REG_COPIES) {
regs[0] = copy;
}
regs[regs_count] = copy;
return regs_count+1;
}
/* add copy to register stack for original reg */
static int
init_regcopy(wamreg regs[MAX_REG_COPIES], wamreg copy)
{
regs[0] = copy;
return 1;
}
/* add copy to register stack for original reg */
static int
delete_regcopy(wamreg regs[MAX_REG_COPIES], int regs_count, wamreg copy)
{
int i = 0;
while (i < regs_count) {
if (regs[i] == copy) {
/* we found it */
regs[i] = regs[MAX_REG_COPIES-1];
return regs_count-1;
}
i++;
}
/* this copy had overflowed, or it just was not there */
return regs_count;
}
/* add copy to register stack for original reg */
inline static int
regcopy_in(wamreg regs[MAX_REG_COPIES], int regs_count, wamreg copy)
{
int i = 0;
do {
if (regs[i] == copy) {
return TRUE;
}
i++;
} while (i < regs_count);
/* this copy could not be found */
return FALSE;
}
/* Restores a prolog clause, in its compiled form */
#if YAPOR
static int
has_cut(yamop *pc)
/*
* Cl points to the start of the code, IsolFlag tells if we have a single
* clause for this predicate or not
*/
{
do {
op_numbers op = Yap_op_from_opcode(pc->opc);
switch (op) {
case _Ystop:
case _Nstop:
return FALSE;
/* instructions type ld */
case _cut:
case _cut_t:
case _cut_e:
case _p_cut_by_y:
case _p_cut_by_x:
case _commit_b_y:
case _commit_b_x:
return TRUE;
case _try_me:
case _retry_me:
case _trust_me:
case _profiled_retry_me:
case _profiled_trust_me:
case _count_retry_me:
case _count_trust_me:
case _spy_or_trymark:
case _try_and_mark:
case _profiled_retry_and_mark:
case _count_retry_and_mark:
case _retry_and_mark:
case _try_clause:
case _retry:
case _trust:
#ifdef YAPOR
case _getwork:
case _getwork_seq:
case _sync:
#endif /* YAPOR */
#ifdef TABLING
case _table_load_answer:
case _table_try_answer:
case _table_try_me_single:
case _table_try_me:
case _table_retry_me:
case _table_trust_me:
case _table_answer_resolution:
case _table_completion:
#endif /* TABLING */
pc = NEXTOP(pc,ld);
break;
/* instructions type Ill */
case _enter_lu_pred:
case _stale_lu_index:
pc = pc->u.Ill.l1;
break;
case _execute:
case _dexecute:
pc = NEXTOP(pc,pp);
break;
/* instructions type l */
case _enter_profiling:
case _count_call:
case _retry_profiled:
case _count_retry:
case _trust_logical_pred:
case _jump:
case _move_back:
case _skip:
case _jump_if_var:
case _try_in:
case _try_clause2:
case _try_clause3:
case _try_clause4:
case _retry2:
case _retry3:
case _retry4:
case _p_eq:
case _p_dif:
pc = NEXTOP(pc,l);
break;
case _jump_if_nonvar:
pc = NEXTOP(pc,xll);
break;
/* instructions type EC */
case _alloc_for_logical_pred:
pc = NEXTOP(pc,EC);
break;
/* instructions type e */
case _trust_fail:
case _op_fail:
case _allocate:
case _deallocate:
case _write_void:
case _write_list:
case _write_l_list:
#if !defined(YAPOR)
case _or_last:
#endif /* !YAPOR */
case _pop:
case _index_pred:
#if THREADS
case _thread_local:
#endif
case _expand_index:
case _undef_p:
case _spy_pred:
case _p_equal:
case _p_functor:
case _p_execute_tail:
case _enter_a_profiling:
case _count_a_call:
case _index_dbref:
case _index_blob:
#ifdef YAPOR
case _getwork_first_time:
#endif /* YAPOR */
#ifdef TABLING
case _trie_do_null:
case _trie_trust_null:
case _trie_try_null:
case _trie_retry_null:
case _trie_do_var:
case _trie_trust_var:
case _trie_try_var:
case _trie_retry_var:
case _trie_do_val:
case _trie_trust_val:
case _trie_try_val:
case _trie_retry_val:
case _trie_do_atom:
case _trie_trust_atom:
case _trie_try_atom:
case _trie_retry_atom:
case _trie_do_list:
case _trie_trust_list:
case _trie_try_list:
case _trie_retry_list:
case _trie_do_struct:
case _trie_trust_struct:
case _trie_try_struct:
case _trie_retry_struct:
case _trie_do_extension:
case _trie_trust_extension:
case _trie_try_extension:
case _trie_retry_extension:
case _trie_do_float:
case _trie_trust_float:
case _trie_try_float:
case _trie_retry_float:
case _trie_do_long:
case _trie_trust_long:
case _trie_try_long:
case _trie_retry_long:
#endif /* TABLING */
pc = NEXTOP(pc,e);
break;
case _expand_clauses:
pc = NEXTOP(pc,sp);
break;
/* instructions type x */
case _save_b_x:
case _get_list:
case _put_list:
case _write_x_var:
case _write_x_val:
case _write_x_loc:
pc = NEXTOP(pc,x);
break;
/* instructions type xF */
case _p_atom_x:
case _p_atomic_x:
case _p_integer_x:
case _p_nonvar_x:
case _p_number_x:
case _p_var_x:
case _p_db_ref_x:
case _p_primitive_x:
case _p_compound_x:
case _p_float_x:
case _p_cut_by_x:
pc = NEXTOP(pc,xF);
break;
/* instructions type y */
case _save_b_y:
case _write_y_var:
case _write_y_val:
case _write_y_loc:
pc = NEXTOP(pc,y);
break;
/* instructions type yF */
case _p_atom_y:
case _p_atomic_y:
case _p_integer_y:
case _p_nonvar_y:
case _p_number_y:
case _p_var_y:
case _p_db_ref_y:
case _p_primitive_y:
case _p_compound_y:
case _p_float_y:
case _p_cut_by_y:
pc = NEXTOP(pc,yF);
break;
/* instructions type sla */
case _p_execute:
case _fcall:
case _call:
#ifdef YAPOR
case _or_last:
#endif /* YAPOR */
pc = NEXTOP(pc,sla);
break;
/* instructions type sla, but for disjunctions */
case _either:
case _or_else:
pc = NEXTOP(pc,sla);
break;
/* instructions type sla, but for functions */
case _call_cpred:
case _call_usercpred:
pc = NEXTOP(pc,sla);
break;
/* instructions type xx */
case _get_x_var:
case _get_x_val:
case _glist_valx:
case _gl_void_varx:
case _gl_void_valx:
case _put_x_var:
case _put_x_val:
pc = NEXTOP(pc,xx);
break;
case _put_xx_val:
pc = NEXTOP(pc,xxxx);
break;
/* instructions type yx */
case _get_y_var:
case _get_y_val:
case _put_y_var:
case _put_y_val:
case _put_unsafe:
pc = NEXTOP(pc,yx);
break;
/* instructions type xc */
case _get_atom:
case _put_atom:
case _get_float:
case _get_longint:
case _get_bigint:
pc = NEXTOP(pc,xc);
break;
/* instructions type cc */
case _get_2atoms:
pc = NEXTOP(pc,cc);
break;
/* instructions type ccc */
case _get_3atoms:
pc = NEXTOP(pc,ccc);
break;
/* instructions type cccc */
case _get_4atoms:
pc = NEXTOP(pc,cccc);
break;
/* instructions type ccccc */
case _get_5atoms:
pc = NEXTOP(pc,ccccc);
break;
/* instructions type cccccc */
case _get_6atoms:
pc = NEXTOP(pc,cccccc);
break;
/* instructions type xf */
case _get_struct:
case _put_struct:
pc = NEXTOP(pc,xf);
break;
/* instructions type xy */
case _glist_valy:
case _gl_void_vary:
case _gl_void_valy:
pc = NEXTOP(pc,xy);
break;
/* instructions type ox */
case _unify_x_var:
case _unify_x_var_write:
case _unify_l_x_var:
case _unify_l_x_var_write:
case _unify_x_val_write:
case _unify_x_val:
case _unify_l_x_val_write:
case _unify_l_x_val:
case _unify_x_loc_write:
case _unify_x_loc:
case _unify_l_x_loc_write:
case _unify_l_x_loc:
case _save_pair_x_write:
case _save_pair_x:
case _save_appl_x_write:
case _save_appl_x:
pc = NEXTOP(pc,ox);
break;
/* instructions type oxx */
case _unify_x_var2:
case _unify_x_var2_write:
case _unify_l_x_var2:
case _unify_l_x_var2_write:
pc = NEXTOP(pc,oxx);
break;
/* instructions type oy */
case _unify_y_var:
case _unify_y_var_write:
case _unify_l_y_var:
case _unify_l_y_var_write:
case _unify_y_val_write:
case _unify_y_val:
case _unify_l_y_val_write:
case _unify_l_y_val:
case _unify_y_loc_write:
case _unify_y_loc:
case _unify_l_y_loc_write:
case _unify_l_y_loc:
case _save_pair_y_write:
case _save_pair_y:
case _save_appl_y_write:
case _save_appl_y:
pc = NEXTOP(pc,oy);
break;
/* instructions type o */
case _unify_void_write:
case _unify_void:
case _unify_l_void_write:
case _unify_l_void:
case _unify_list_write:
case _unify_list:
case _unify_l_list_write:
case _unify_l_list:
pc = NEXTOP(pc,o);
break;
/* instructions type os */
case _unify_n_voids_write:
case _unify_n_voids:
case _unify_l_n_voids_write:
case _unify_l_n_voids:
pc = NEXTOP(pc,os);
break;
/* instructions type oc */
case _unify_atom_write:
case _unify_atom:
case _unify_l_atom_write:
case _unify_l_atom:
case _unify_float:
case _unify_l_float:
case _unify_longint:
case _unify_l_longint:
case _unify_bigint:
case _unify_l_bigint:
pc = NEXTOP(pc,oc);
break;
/* instructions type osc */
case _unify_n_atoms_write:
case _unify_n_atoms:
pc = NEXTOP(pc,osc);
break;
/* instructions type of */
case _unify_struct_write:
case _unify_struct:
case _unify_l_struc_write:
case _unify_l_struc:
pc = NEXTOP(pc,of);
break;
/* instructions type s */
case _write_n_voids:
case _pop_n:
#ifdef TABLING
case _table_new_answer:
#endif /* TABLING */
pc = NEXTOP(pc,s);
break;
/* instructions type ps */
case _write_atom:
pc = NEXTOP(pc,c);
break;
/* instructions type sc */
case _write_n_atoms:
pc = NEXTOP(pc,sc);
break;
/* instructions type f */
case _write_struct:
case _write_l_struc:
pc = NEXTOP(pc,f);
break;
/* instructions type sdl */
case _call_c_wfail:
pc = NEXTOP(pc,sdl);
break;
/* instructions type lds */
case _try_c:
case _try_userc:
pc = NEXTOP(pc,lds);
break;
case _retry_c:
case _retry_userc:
pc = NEXTOP(pc,lds);
break;
/* instructions type llll */
case _switch_on_type:
return FALSE;
break;
case _switch_list_nl:
return FALSE;
break;
case _switch_on_arg_type:
return FALSE;
break;
case _switch_on_sub_arg_type:
return FALSE;
/* instructions type lll */
/* instructions type cll */
case _if_not_then:
return FALSE;
/* instructions type sl */
case _switch_on_func:
case _switch_on_cons:
case _go_on_func:
case _go_on_cons:
case _if_func:
case _if_cons:
return FALSE;
/* instructions type xxx */
case _p_plus_vv:
case _p_minus_vv:
case _p_times_vv:
case _p_div_vv:
case _p_and_vv:
case _p_or_vv:
case _p_sll_vv:
case _p_slr_vv:
case _p_arg_vv:
case _p_func2s_vv:
case _p_func2f_xx:
pc = NEXTOP(pc,xxx);
break;
/* instructions type xxc */
case _p_plus_vc:
case _p_minus_cv:
case _p_times_vc:
case _p_div_cv:
case _p_and_vc:
case _p_or_vc:
case _p_sll_vc:
case _p_slr_vc:
case _p_func2s_vc:
pc = NEXTOP(pc,xxc);
break;
case _p_div_vc:
case _p_sll_cv:
case _p_slr_cv:
case _p_arg_cv:
pc = NEXTOP(pc,xcx);
break;
case _p_func2s_cv:
pc = NEXTOP(pc,xcx);
break;
/* instructions type xyx */
case _p_func2f_xy:
pc = NEXTOP(pc,xyx);
break;
/* instructions type yxx */
case _p_plus_y_vv:
case _p_minus_y_vv:
case _p_times_y_vv:
case _p_div_y_vv:
case _p_and_y_vv:
case _p_or_y_vv:
case _p_sll_y_vv:
case _p_slr_y_vv:
case _p_arg_y_vv:
case _p_func2s_y_vv:
case _p_func2f_yx:
pc = NEXTOP(pc,yxx);
break;
/* instructions type yyx */
case _p_func2f_yy:
pc = NEXTOP(pc,yyx);
break;
/* instructions type yxc */
case _p_plus_y_vc:
case _p_minus_y_cv:
case _p_times_y_vc:
case _p_div_y_vc:
case _p_div_y_cv:
case _p_and_y_vc:
case _p_or_y_vc:
case _p_sll_y_vc:
case _p_slr_y_vc:
case _p_func2s_y_vc:
pc = NEXTOP(pc,yxc);
break;
/* instructions type ycx */
case _p_sll_y_cv:
case _p_slr_y_cv:
case _p_arg_y_cv:
pc = NEXTOP(pc,ycx);
break;
/* instructions type ycx */
case _p_func2s_y_cv:
pc = NEXTOP(pc,ycx);
break;
/* instructions type llxx */
case _call_bfunc_xx:
pc = NEXTOP(pc,llxx);
break;
/* instructions type llxy */
case _call_bfunc_yx:
case _call_bfunc_xy:
pc = NEXTOP(pc,llxy);
break;
case _call_bfunc_yy:
pc = NEXTOP(pc,llyy);
break;
}
} while (TRUE);
}
#else
#define has_cut(pc) 0
#endif /* YAPOR */
static void
add_info(ClauseDef *clause, UInt regno)
{
wamreg myregs[MAX_REG_COPIES];
int nofregs;
yslot ycopy = 0;
yamop *cl;
nofregs = init_regcopy(myregs, Yap_regnotoreg(regno));
cl = clause->CurrentCode;
while (TRUE) {
op_numbers op = Yap_op_from_opcode(cl->opc);
switch (op) {
case _alloc_for_logical_pred:
cl = NEXTOP(cl,EC);
break;
case _cut:
case _cut_t:
case _cut_e:
clause->Tag = (CELL)NULL;
return;
case _allocate:
case _deallocate:
case _write_void:
case _write_list:
case _write_l_list:
case _enter_a_profiling:
case _count_a_call:
cl = NEXTOP(cl,e);
break;
case _commit_b_x:
clause->Tag = (CELL)NULL;
return;
case _save_b_x:
case _write_x_val:
case _write_x_loc:
case _write_x_var:
case _put_list:
if (regcopy_in(myregs, nofregs, cl->u.x.x)) {
clause->Tag = (CELL)NULL;
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,x);
break;
case _p_nonvar_x:
if (cl->u.xF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (regcopy_in(myregs, nofregs, cl->u.xF.x)) {
clause->Tag = (CELL)NULL;
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xF);
break;
case _p_number_x:
if (cl->u.xF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (regcopy_in(myregs, nofregs, cl->u.xF.x)) {
clause->Tag = (_number+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xF);
break;
case _p_atomic_x:
if (cl->u.xF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (regcopy_in(myregs, nofregs, cl->u.xF.x)) {
clause->Tag = (_atomic+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xF);
break;
case _p_integer_x:
if (cl->u.xF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (regcopy_in(myregs, nofregs, cl->u.xF.x)) {
clause->Tag = (_integer+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xF);
break;
case _p_primitive_x:
if (cl->u.xF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (regcopy_in(myregs, nofregs, cl->u.xF.x)) {
clause->Tag = (_primitive+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xF);
break;
case _p_compound_x:
if (cl->u.xF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (regcopy_in(myregs, nofregs, cl->u.xF.x)) {
clause->Tag = (_compound+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xF);
break;
case _p_var_x:
if (cl->u.xF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (regcopy_in(myregs, nofregs, cl->u.xF.x)) {
clause->Tag = (_var+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xF);
break;
case _p_db_ref_x:
if (cl->u.xF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (regcopy_in(myregs, nofregs, cl->u.xF.x)) {
clause->Tag = AbsAppl((CELL *)FunctorDBRef);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xF);
break;
case _p_float_x:
if (cl->u.xF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (regcopy_in(myregs, nofregs, cl->u.xF.x)) {
clause->Tag = AbsAppl((CELL *)FunctorDouble);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xF);
break;
case _p_atom_x:
if (cl->u.xF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (regcopy_in(myregs, nofregs, cl->u.xF.x)) {
clause->Tag = (_atom+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xF);
break;
case _get_list:
if (regcopy_in(myregs, nofregs, cl->u.x.x)) {
clause->Tag = AbsPair(NULL);
clause->u.WorkPC = NEXTOP(cl,x);
return;
}
cl = NEXTOP(cl,x);
break;
case _p_cut_by_x:
clause->Tag = (CELL)NULL;
return;
case _commit_b_y:
clause->Tag = (CELL)NULL;
return;
case _save_b_y:
case _write_y_var:
case _write_y_val:
case _write_y_loc:
if (cl->u.y.y == ycopy) {
clause->Tag = (CELL)NULL;
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,y);
break;
case _p_nonvar_y:
if (cl->u.yF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (cl->u.yF.y == ycopy) {
clause->Tag = (CELL)NULL;
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,yF);
break;
case _p_atomic_y:
if (cl->u.yF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (ycopy == cl->u.yF.y) {
clause->Tag = (_atomic+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,yF);
break;
case _p_integer_y:
if (cl->u.yF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (ycopy == cl->u.yF.y) {
clause->Tag = (_integer+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,yF);
break;
case _p_number_y:
if (cl->u.yF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (ycopy == cl->u.yF.y) {
clause->Tag = (_number+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,yF);
break;
case _p_primitive_y:
if (cl->u.yF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (ycopy == cl->u.yF.y) {
clause->Tag = (_primitive+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,yF);
break;
case _p_compound_y:
if (cl->u.yF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (ycopy == cl->u.yF.y) {
clause->Tag = (_compound+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,yF);
break;
case _p_db_ref_y:
if (cl->u.yF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (ycopy == cl->u.yF.y) {
clause->Tag = AbsAppl((CELL *)FunctorDBRef);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,yF);
break;
case _p_float_y:
if (cl->u.yF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (ycopy == cl->u.yF.y) {
clause->Tag = AbsAppl((CELL *)FunctorDouble);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,yF);
break;
case _p_atom_y:
if (cl->u.yF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (cl->u.yF.y == ycopy) {
clause->Tag = (_atom+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,yF);
break;
case _p_var_y:
if (cl->u.yF.F != FAILCODE) {
clause->Tag = (CELL)NULL;
return;
}
if (cl->u.yF.y == ycopy) {
clause->Tag = (_var+1)*sizeof(CELL);
clause->u.t_ptr = (CELL)NULL;
return;
}
cl = NEXTOP(cl,yF);
break;
case _p_cut_by_y:
clause->Tag = (CELL)NULL;
return;
case _p_execute:
case _fcall:
case _call:
#ifdef YAPOR
case _or_last:
#endif /* YAPOR */
case _either:
case _or_else:
case _call_cpred:
case _call_usercpred:
clause->Tag = (CELL)NULL;
return;
case _get_x_var:
if (regcopy_in(myregs, nofregs, cl->u.xx.xr)) {
nofregs = add_regcopy(myregs, nofregs, cl->u.xx.xl);
cl = NEXTOP(cl,xx);
break;
}
case _put_x_var:
/* if the last slot I am using, get out */
if (regcopy_in(myregs, nofregs, cl->u.xx.xl) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.xx.xl)) == 0 &&
!ycopy) {
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xx);
break;
case _get_x_val:
/* alias two registers */
if (regcopy_in(myregs, nofregs, cl->u.xx.xl)) {
nofregs = add_regcopy(myregs, nofregs, cl->u.xx.xr);
} else if (regcopy_in(myregs, nofregs, cl->u.xx.xr)) {
nofregs = add_regcopy(myregs, nofregs, cl->u.xx.xl);
}
cl = NEXTOP(cl,xx);
break;
case _put_x_val:
if (regcopy_in(myregs, nofregs, cl->u.xx.xl)) {
nofregs = add_regcopy(myregs, nofregs, cl->u.xx.xr);
} else if (regcopy_in(myregs, nofregs, cl->u.xx.xr) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.xx.xr)) == 0 &&
!ycopy) {
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xx);
break;
case _put_xx_val:
if (regcopy_in(myregs, nofregs, cl->u.xxxx.xl1)) {
nofregs = add_regcopy(myregs, nofregs, cl->u.xxxx.xr1);
} else if (regcopy_in(myregs, nofregs, cl->u.xxxx.xr1) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.xxxx.xr1)) == 0 &&
!ycopy) {
clause->Tag = (CELL)NULL;
return;
}
if (regcopy_in(myregs, nofregs, cl->u.xxxx.xl2)) {
nofregs = add_regcopy(myregs, nofregs, cl->u.xxxx.xr2);
} else if (regcopy_in(myregs, nofregs, cl->u.xxxx.xr2) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.xxxx.xr2)) == 0 &&
!ycopy) {
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xxxx);
break;
case _glist_valx:
case _gl_void_varx:
case _gl_void_valx:
if (regcopy_in(myregs, nofregs, cl->u.xx.xl)) {
clause->u.WorkPC = cl;
clause->Tag = AbsPair(NULL);
return;
}
cl = NEXTOP(cl,xx);
break;
case _get_y_var:
if (regcopy_in(myregs, nofregs, cl->u.yx.x)) {
ycopy = cl->u.yx.y;
}
case _put_y_var:
cl = NEXTOP(cl,yx);
break;
case _put_y_val:
case _put_unsafe:
if (ycopy == cl->u.yx.y) {
nofregs = add_regcopy(myregs, nofregs, cl->u.yx.x);
} else {
nofregs = delete_regcopy(myregs, nofregs, cl->u.yx.x);
}
cl = NEXTOP(cl,yx);
break;
case _get_y_val:
if (regcopy_in(myregs, nofregs, cl->u.yx.x)) {
ycopy = cl->u.yx.y;
} else if (ycopy == cl->u.yx.y) {
nofregs = add_regcopy(myregs, nofregs, cl->u.yx.x);
}
cl = NEXTOP(cl,yx);
break;
case _get_atom:
if (regcopy_in(myregs, nofregs, cl->u.xc.x)) {
clause->Tag = cl->u.xc.c;
return;
} else {
cl = NEXTOP(cl,xc);
}
break;
case _get_2atoms:
if (regcopy_in(myregs, nofregs, Yap_regnotoreg(1))) {
clause->Tag = cl->u.cc.c1;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(2))) {
clause->Tag = cl->u.cc.c2;
return;
} else {
cl = NEXTOP(cl,cc);
}
break;
case _get_3atoms:
if (regcopy_in(myregs, nofregs,Yap_regnotoreg(1) )) {
clause->Tag = cl->u.ccc.c1;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(2))) {
clause->Tag = cl->u.ccc.c2;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(3))) {
clause->Tag = cl->u.ccc.c3;
return;
} else {
cl = NEXTOP(cl,ccc);
}
break;
case _get_4atoms:
if (regcopy_in(myregs, nofregs, Yap_regnotoreg(1))) {
clause->Tag = cl->u.cccc.c1;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(2))) {
clause->Tag = cl->u.cccc.c2;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(3))) {
clause->Tag = cl->u.cccc.c3;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(4))) {
clause->Tag = cl->u.cccc.c4;
return;
} else {
cl = NEXTOP(cl,cccc);
}
break;
case _get_5atoms:
if (regcopy_in(myregs, nofregs, Yap_regnotoreg(1))) {
clause->Tag = cl->u.ccccc.c1;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(2))) {
clause->Tag = cl->u.ccccc.c2;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(3))) {
clause->Tag = cl->u.ccccc.c3;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(4))) {
clause->Tag = cl->u.ccccc.c4;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(5))) {
clause->Tag = cl->u.ccccc.c5;
return;
} else {
cl = NEXTOP(cl,ccccc);
}
break;
case _get_6atoms:
if (regcopy_in(myregs, nofregs, Yap_regnotoreg(1))) {
clause->Tag = cl->u.cccccc.c1;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(2))) {
clause->Tag = cl->u.cccccc.c2;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(3))) {
clause->Tag = cl->u.cccccc.c3;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(4))) {
clause->Tag = cl->u.cccccc.c4;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(5))) {
clause->Tag = cl->u.cccccc.c5;
return;
} else if (regcopy_in(myregs, nofregs, Yap_regnotoreg(6))) {
clause->Tag = cl->u.cccccc.c6;
return;
} else {
cl = NEXTOP(cl,cccccc);
}
break;
case _get_float:
if (regcopy_in(myregs, nofregs, cl->u.xc.x)) {
clause->u.t_ptr = cl->u.xc.c;
clause->Tag = AbsAppl((CELL *)FunctorDouble);
return;
} else {
cl = NEXTOP(cl,xc);
}
break;
case _get_longint:
if (regcopy_in(myregs, nofregs, cl->u.xc.x)) {
clause->u.t_ptr = cl->u.xc.c;
clause->Tag = AbsAppl((CELL *)FunctorLongInt);
return;
} else {
cl = NEXTOP(cl,xc);
}
break;
case _get_bigint:
if (regcopy_in(myregs, nofregs, cl->u.xc.x)) {
clause->u.t_ptr = cl->u.xc.c;
#ifdef USE_GMP
clause->Tag = AbsAppl((CELL *)FunctorBigInt);
#else
clause->Tag = AbsAppl((CELL *)FunctorLongInt);
#endif
return;
} else {
cl = NEXTOP(cl,xc);
}
break;
case _copy_idb_term:
case _unify_idb_term:
if (regno == 2) {
LogUpdClause *lcl = ClauseCodeToLogUpdClause(cl);
Term t = lcl->ClSource->Entry;
if (IsVarTerm(t)) {
clause->Tag = (CELL)NULL;
} else if (IsApplTerm(t)) {
CELL *pt = RepAppl(t);
clause->Tag = AbsAppl((CELL *)pt[0]);
clause->u.c_sreg = pt;
} else if (IsPairTerm(t)) {
CELL *pt = RepPair(t);
clause->Tag = AbsPair(NULL);
clause->u.c_sreg = pt-1;
} else {
clause->Tag = t;
}
} else {
clause->Tag = (CELL)NULL;
}
return;
case _put_atom:
if (regcopy_in(myregs, nofregs, cl->u.xc.x) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.xc.x)) == 0 &&
!ycopy) {
clause->Tag = (CELL)NULL;
return;
} else {
cl = NEXTOP(cl,xc);
}
break;
case _get_struct:
if (regcopy_in(myregs, nofregs, cl->u.xf.x)) {
clause->u.WorkPC = NEXTOP(cl,xf);
clause->Tag = AbsAppl((CELL *)cl->u.xf.f);
return;
} else {
cl = NEXTOP(cl,xf);
}
break;
case _put_struct:
if (regcopy_in(myregs, nofregs, cl->u.xf.x) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.xf.x)) == 0 &&
!ycopy) {
clause->Tag = (CELL)NULL;
return;
} else {
cl = NEXTOP(cl,xf);
}
break;
case _glist_valy:
case _gl_void_vary:
case _gl_void_valy:
if (regcopy_in(myregs, nofregs, cl->u.xy.x)) {
clause->u.WorkPC = cl;
clause->Tag = AbsPair(NULL);
return;
}
cl = NEXTOP(cl,xy);
break;
case _unify_x_var:
case _unify_x_var_write:
case _unify_l_x_var:
case _unify_l_x_var_write:
if (regcopy_in(myregs, nofregs, cl->u.ox.x) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.ox.x)) == 0 &&
!ycopy) {
/* we just initialised the argument, so nothing can happen now */
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,ox);
break;
case _unify_x_val_write:
case _unify_x_val:
case _unify_l_x_val_write:
case _unify_l_x_val:
case _unify_x_loc_write:
case _unify_x_loc:
case _unify_l_x_loc_write:
case _unify_l_x_loc:
/* we're just done with the head of a list, but there
is nothing inside.
*/
cl = NEXTOP(cl,ox);
break;
case _save_pair_x_write:
case _save_pair_x:
case _save_appl_x_write:
case _save_appl_x:
if (regcopy_in(myregs, nofregs, cl->u.ox.x) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.ox.x)) == 0 &&
!ycopy) {
/* we just initialised the argument, so nothing can happen now */
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,ox);
break;
case _unify_x_var2:
case _unify_x_var2_write:
case _unify_l_x_var2:
case _unify_l_x_var2_write:
if (regcopy_in(myregs, nofregs, cl->u.oxx.xl) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.oxx.xl)) == 0 &&
!ycopy) {
/* we just initialised the argument, so nothing can happen now */
clause->Tag = (CELL)NULL;
return;
}
if (regcopy_in(myregs, nofregs, cl->u.oxx.xr) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.oxx.xr)) == 0 &&
!ycopy) {
/* we just initialised the argument, so nothing can happen now */
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,oxx);
break;
case _unify_y_var:
case _unify_y_var_write:
case _unify_l_y_var:
case _unify_l_y_var_write:
/* we're just done with the head of a list, but there
is nothing inside.
*/
if (cl->u.oy.y == ycopy) {
ycopy = 0; /* weird stuff, let's just reset ycopy */
if (nofregs == 0) {
clause->Tag = (CELL)NULL;
return;
}
}
cl = NEXTOP(cl,oy);
break;
case _unify_y_val_write:
case _unify_y_val:
case _unify_l_y_val_write:
case _unify_l_y_val:
case _unify_y_loc_write:
case _unify_y_loc:
case _unify_l_y_loc_write:
case _unify_l_y_loc:
/* we're just done with the head of a list, but there
is nothing inside.
*/
cl = NEXTOP(cl,oy);
break;
case _save_pair_y_write:
case _save_pair_y:
case _save_appl_y_write:
case _save_appl_y:
if (cl->u.oy.y == ycopy) {
ycopy = 0; /* weird stuff, let's just reset ycopy */
if (nofregs == 0) {
clause->Tag = (CELL)NULL;
return;
}
}
cl = NEXTOP(cl,oy);
break;
case _unify_void_write:
case _unify_void:
case _unify_l_void_write:
case _unify_l_void:
/* we're just done with the head of a list, but there
is nothing inside.
*/
cl = NEXTOP(cl,o);
break;
case _unify_list_write:
case _unify_list:
case _unify_l_list_write:
case _unify_l_list:
cl = NEXTOP(cl,o);
break;
case _unify_n_voids_write:
case _unify_n_voids:
case _unify_l_n_voids_write:
case _unify_l_n_voids:
cl = NEXTOP(cl,os);
break;
case _unify_atom_write:
case _unify_atom:
case _unify_l_atom_write:
case _unify_l_atom:
cl = NEXTOP(cl,oc);
break;
case _unify_float:
case _unify_l_float:
cl = NEXTOP(cl,oc);
break;
case _unify_longint:
case _unify_l_longint:
cl = NEXTOP(cl,oc);
break;
case _unify_bigint:
case _unify_l_bigint:
cl = NEXTOP(cl,oc);
break;
case _unify_n_atoms_write:
case _unify_n_atoms:
cl = NEXTOP(cl,osc);
break;
case _unify_struct_write:
case _unify_struct:
case _unify_l_struc_write:
case _unify_l_struc:
cl = NEXTOP(cl,of);
break;
case _write_n_voids:
case _pop_n:
cl = NEXTOP(cl,s);
break;
case _write_atom:
cl = NEXTOP(cl,c);
break;
case _write_n_atoms:
cl = NEXTOP(cl,sc);
break;
case _write_struct:
case _write_l_struc:
cl = NEXTOP(cl,f);
break;
case _call_c_wfail:
case _try_c:
case _try_userc:
case _retry_c:
case _retry_userc:
#ifdef CUT_C
case _cut_c:
case _cut_userc:
#endif
case _switch_on_type:
case _switch_list_nl:
case _switch_on_arg_type:
case _switch_on_sub_arg_type:
case _if_not_then:
case _switch_on_func:
case _switch_on_cons:
case _go_on_func:
case _go_on_cons:
case _if_func:
case _if_cons:
clause->Tag = (CELL)NULL;
return;
case _p_plus_vv:
case _p_minus_vv:
case _p_times_vv:
case _p_div_vv:
case _p_and_vv:
case _p_or_vv:
case _p_sll_vv:
case _p_slr_vv:
case _p_arg_vv:
case _p_func2s_vv:
case _p_func2f_xx:
if (regcopy_in(myregs, nofregs, cl->u.xxx.x) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.xxx.x)) == 0 &&
!ycopy) {
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xxx);
break;
case _p_plus_vc:
case _p_minus_cv:
case _p_times_vc:
case _p_div_cv:
case _p_and_vc:
case _p_or_vc:
case _p_sll_vc:
case _p_slr_vc:
case _p_func2s_vc:
if (regcopy_in(myregs, nofregs, cl->u.xxc.x) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.xxc.x)) == 0 &&
!ycopy) {
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xxc);
break;
case _p_div_vc:
case _p_sll_cv:
case _p_slr_cv:
case _p_arg_cv:
case _p_func2s_cv:
if (regcopy_in(myregs, nofregs, cl->u.xcx.x) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.xcx.x)) == 0 &&
!ycopy) {
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xcx);
break;
case _p_func2f_xy:
if (regcopy_in(myregs, nofregs, cl->u.xyx.x) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.xyx.x)) == 0 &&
!ycopy) {
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xyx);
break;
case _p_plus_y_vv:
case _p_minus_y_vv:
case _p_times_y_vv:
case _p_div_y_vv:
case _p_and_y_vv:
case _p_or_y_vv:
case _p_sll_y_vv:
case _p_slr_y_vv:
case _p_arg_y_vv:
case _p_func2s_y_vv:
case _p_func2f_yx:
if (cl->u.yxx.y == ycopy) {
ycopy = 0; /* weird stuff, let's just reset ycopy */
if (nofregs == 0) {
clause->Tag = (CELL)NULL;
return;
}
}
cl = NEXTOP(cl,yxx);
break;
case _p_func2f_yy:
if (regcopy_in(myregs, nofregs, cl->u.yyx.x) &&
(nofregs = delete_regcopy(myregs, nofregs, cl->u.yyx.x)) == 0 &&
!ycopy) {
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,yyx);
break;
case _p_plus_y_vc:
case _p_minus_y_cv:
case _p_times_y_vc:
case _p_div_y_vc:
case _p_div_y_cv:
case _p_and_y_vc:
case _p_or_y_vc:
case _p_sll_y_vc:
case _p_slr_y_vc:
case _p_func2s_y_vc:
if (cl->u.yxc.y == ycopy) {
ycopy = 0; /* weird stuff, let's just reset ycopy */
if (nofregs == 0) {
clause->Tag = (CELL)NULL;
return;
}
}
cl = NEXTOP(cl,yxc);
break;
case _p_sll_y_cv:
case _p_slr_y_cv:
case _p_arg_y_cv:
case _p_func2s_y_cv:
if (cl->u.ycx.y == ycopy) {
ycopy = 0; /* weird stuff, let's just reset ycopy */
if (nofregs == 0) {
clause->Tag = (CELL)NULL;
return;
}
}
cl = NEXTOP(cl,ycx);
break;
case _call_bfunc_xx:
cl = NEXTOP(cl,llxx);
break;
case _call_bfunc_yx:
case _call_bfunc_xy:
cl = NEXTOP(cl,llxy);
break;
case _call_bfunc_yy:
cl = NEXTOP(cl,llyy);
break;
case _Ystop:
case _Nstop:
case _try_me:
case _retry_me:
case _trust_me:
case _profiled_retry_me:
case _profiled_trust_me:
case _count_retry_me:
case _count_trust_me:
case _spy_or_trymark:
case _try_and_mark:
case _profiled_retry_and_mark:
case _count_retry_and_mark:
case _retry_and_mark:
case _try_clause:
case _retry:
case _trust:
case _enter_lu_pred:
case _stale_lu_index:
#ifdef YAPOR
case _getwork:
case _getwork_seq:
case _sync:
#endif /* YAPOR */
#ifdef TABLING
case _table_try_single:
cl = NEXTOP(cl,ld);
break;
case _table_load_answer:
case _table_try_answer:
case _table_try_me:
case _table_retry_me:
case _table_trust_me:
case _table_try:
case _table_retry:
case _table_trust:
case _table_answer_resolution:
case _table_completion:
#endif /* TABLING */
case _enter_profiling:
case _count_call:
case _retry_profiled:
case _count_retry:
case _trust_logical_pred:
case _execute:
case _dexecute:
case _jump:
case _move_back:
case _skip:
case _jump_if_var:
case _try_in:
case _lock_lu:
case _unlock_lu:
case _try_clause2:
case _try_clause3:
case _try_clause4:
case _retry2:
case _retry3:
case _retry4:
clause->Tag = (CELL)NULL;
return;
case _jump_if_nonvar:
clause->Tag = (CELL)NULL;
return;
/* instructions type e */
case _trust_fail:
case _op_fail:
case _procceed:
#if !defined(YAPOR)
case _or_last:
#endif /* !YAPOR */
case _pop:
case _index_pred:
#if THREADS
case _thread_local:
#endif
case _expand_index:
case _expand_clauses:
case _undef_p:
case _spy_pred:
case _p_equal:
case _p_dif:
case _p_eq:
case _p_functor:
case _p_execute_tail:
case _index_dbref:
case _index_blob:
#ifdef YAPOR
case _getwork_first_time:
#endif /* YAPOR */
#ifdef TABLING
case _table_new_answer:
case _trie_do_null:
case _trie_trust_null:
case _trie_try_null:
case _trie_retry_null:
case _trie_do_var:
case _trie_trust_var:
case _trie_try_var:
case _trie_retry_var:
case _trie_do_val:
case _trie_trust_val:
case _trie_try_val:
case _trie_retry_val:
case _trie_do_atom:
case _trie_trust_atom:
case _trie_try_atom:
case _trie_retry_atom:
case _trie_do_list:
case _trie_trust_list:
case _trie_try_list:
case _trie_retry_list:
case _trie_do_struct:
case _trie_trust_struct:
case _trie_try_struct:
case _trie_retry_struct:
case _trie_do_extension:
case _trie_trust_extension:
case _trie_try_extension:
case _trie_retry_extension:
case _trie_do_float:
case _trie_trust_float:
case _trie_try_float:
case _trie_retry_float:
case _trie_do_long:
case _trie_trust_long:
case _trie_try_long:
case _trie_retry_long:
#endif /* TABLING */
#ifdef BEAM
case _run_eam:
#endif
clause->Tag = (CELL)NULL;
return;
}
}
}
static void
add_head_info(ClauseDef *clause, UInt regno)
{
wamreg iarg = Yap_regnotoreg(regno);
yamop *cl = clause->CurrentCode;
while (TRUE) {
op_numbers op = Yap_op_from_opcode(cl->opc);
switch (op) {
case _get_list:
if (cl->u.x.x == iarg) {
clause->Tag = AbsPair(NULL);
clause->u.WorkPC = NEXTOP(cl,x);
return;
}
cl = NEXTOP(cl,x);
break;
case _get_x_var:
if (cl->u.xx.xl == iarg) {
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xx);
break;
case _get_x_val:
if (cl->u.xx.xl == iarg ||
cl->u.xx.xr == iarg) {
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xx);
break;
case _glist_valx:
case _gl_void_varx:
case _gl_void_valx:
if (cl->u.xx.xl == iarg) {
clause->u.WorkPC = cl;
clause->Tag = AbsPair(NULL);
return;
}
if (cl->u.xx.xr == iarg) {
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,xx);
break;
case _get_y_val:
case _get_y_var:
if (cl->u.xx.xr == iarg) {
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,yx);
break;
case _get_atom:
if (cl->u.xc.x == iarg) {
clause->Tag = cl->u.xc.c;
return;
} else {
cl = NEXTOP(cl,xc);
}
break;
case _get_2atoms:
if (Yap_regnotoreg(1) == iarg) {
clause->Tag = cl->u.cc.c1;
return;
} else if (Yap_regnotoreg(2) == iarg) {
clause->Tag = cl->u.cc.c2;
return;
} else {
cl = NEXTOP(cl,cc);
}
break;
case _get_3atoms:
if (Yap_regnotoreg(1) == iarg) {
clause->Tag = cl->u.ccc.c1;
return;
} else if (Yap_regnotoreg(2) == iarg) {
clause->Tag = cl->u.ccc.c2;
return;
} else if (Yap_regnotoreg(3) == iarg) {
clause->Tag = cl->u.ccc.c3;
return;
} else {
cl = NEXTOP(cl,ccc);
}
break;
case _get_4atoms:
if (Yap_regnotoreg(1) == iarg) {
clause->Tag = cl->u.cccc.c1;
return;
} else if (Yap_regnotoreg(2) == iarg) {
clause->Tag = cl->u.cccc.c2;
return;
} else if (Yap_regnotoreg(3) == iarg) {
clause->Tag = cl->u.cccc.c3;
return;
} else if (Yap_regnotoreg(4) == iarg) {
clause->Tag = cl->u.cccc.c4;
return;
} else {
cl = NEXTOP(cl,cccc);
}
break;
case _get_5atoms:
if (Yap_regnotoreg(1) == iarg) {
clause->Tag = cl->u.ccccc.c1;
return;
} else if (Yap_regnotoreg(2) == iarg) {
clause->Tag = cl->u.ccccc.c2;
return;
} else if (Yap_regnotoreg(3) == iarg) {
clause->Tag = cl->u.ccccc.c3;
return;
} else if (Yap_regnotoreg(4) == iarg) {
clause->Tag = cl->u.ccccc.c4;
return;
} else if (Yap_regnotoreg(5) == iarg) {
clause->Tag = cl->u.ccccc.c5;
return;
} else {
cl = NEXTOP(cl,ccccc);
}
break;
case _get_6atoms:
if (Yap_regnotoreg(1) == iarg) {
clause->Tag = cl->u.cccccc.c1;
return;
} else if (Yap_regnotoreg(2) == iarg) {
clause->Tag = cl->u.cccccc.c2;
return;
} else if (Yap_regnotoreg(3) == iarg) {
clause->Tag = cl->u.cccccc.c3;
return;
} else if (Yap_regnotoreg(4) == iarg) {
clause->Tag = cl->u.cccccc.c4;
return;
} else if (Yap_regnotoreg(5) == iarg) {
clause->Tag = cl->u.cccccc.c5;
return;
} else if (Yap_regnotoreg(6) == iarg) {
clause->Tag = cl->u.cccccc.c6;
return;
} else {
cl = NEXTOP(cl,cccccc);
}
break;
case _get_float:
if (cl->u.xc.x == iarg) {
clause->u.t_ptr = cl->u.xc.c;
clause->Tag = AbsAppl((CELL *)FunctorDouble);
return;
} else {
cl = NEXTOP(cl,xc);
}
break;
case _get_longint:
if (cl->u.xc.x == iarg) {
clause->u.t_ptr = cl->u.xc.c;
clause->Tag = AbsAppl((CELL *)FunctorLongInt);
return;
} else {
cl = NEXTOP(cl,xc);
}
break;
case _get_bigint:
if (cl->u.xc.x == iarg) {
clause->u.t_ptr = cl->u.xc.c;
#ifdef USE_GMP
clause->Tag = AbsAppl((CELL *)FunctorBigInt);
#else
clause->Tag = AbsAppl((CELL *)FunctorLongInt);
#endif
return;
} else {
cl = NEXTOP(cl,xc);
}
break;
case _get_struct:
if (cl->u.xf.x == iarg) {
clause->u.WorkPC = NEXTOP(cl,xf);
clause->Tag = AbsAppl((CELL *)cl->u.xf.f);
return;
} else {
cl = NEXTOP(cl,xf);
}
break;
case _glist_valy:
case _gl_void_vary:
case _gl_void_valy:
if (cl->u.xy.x == iarg) {
clause->u.WorkPC = cl;
clause->Tag = AbsPair(NULL);
return;
}
cl = NEXTOP(cl,xy);
break;
case _unify_x_var:
case _unify_x_var_write:
case _unify_l_x_var:
case _unify_l_x_var_write:
case _unify_x_val_write:
case _unify_x_val:
case _unify_l_x_val_write:
case _unify_l_x_val:
case _unify_x_loc_write:
case _unify_x_loc:
case _unify_l_x_loc_write:
case _unify_l_x_loc:
case _save_pair_x_write:
case _save_pair_x:
case _save_appl_x_write:
case _save_appl_x:
if (cl->u.ox.x == iarg) {
/* we just initialised the argument, so nothing can happen now */
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,ox);
break;
case _unify_x_var2:
case _unify_x_var2_write:
case _unify_l_x_var2:
case _unify_l_x_var2_write:
if (cl->u.oxx.xl == iarg ||
cl->u.oxx.xr == iarg) {
/* we just initialised the argument, so nothing can happen now */
clause->Tag = (CELL)NULL;
return;
}
cl = NEXTOP(cl,oxx);
break;
case _unify_y_var:
case _unify_y_var_write:
case _unify_l_y_var:
case _unify_l_y_var_write:
case _unify_y_val_write:
case _unify_y_val:
case _unify_l_y_val_write:
case _unify_l_y_val:
case _unify_y_loc_write:
case _unify_y_loc:
case _unify_l_y_loc_write:
case _unify_l_y_loc:
case _save_pair_y_write:
case _save_pair_y:
case _save_appl_y_write:
case _save_appl_y:
/* we're just done with the head of a list, but there
is nothing inside.
*/
cl = NEXTOP(cl,oy);
break;
case _unify_void_write:
case _unify_void:
case _unify_l_void_write:
case _unify_l_void:
/* we're just done with the head of a list, but there
is nothing inside.
*/
cl = NEXTOP(cl,o);
break;
case _unify_list_write:
case _unify_list:
case _unify_l_list_write:
case _unify_l_list:
cl = NEXTOP(cl,o);
break;
case _unify_n_voids_write:
case _unify_n_voids:
case _unify_l_n_voids_write:
case _unify_l_n_voids:
cl = NEXTOP(cl,os);
break;
case _unify_atom_write:
case _unify_atom:
case _unify_l_atom_write:
case _unify_l_atom:
cl = NEXTOP(cl,oc);
break;
case _unify_float:
case _unify_l_float:
cl = NEXTOP(cl,oc);
break;
case _unify_longint:
case _unify_l_longint:
cl = NEXTOP(cl,oc);
break;
case _unify_bigint:
case _unify_l_bigint:
cl = NEXTOP(cl,oc);
break;
case _unify_n_atoms_write:
case _unify_n_atoms:
cl = NEXTOP(cl,osc);
break;
case _unify_struct_write:
case _unify_struct:
case _unify_l_struc_write:
case _unify_l_struc:
cl = NEXTOP(cl,of);
break;
case _unify_idb_term:
case _copy_idb_term:
if (regno == 2) {
LogUpdClause *lcl = ClauseCodeToLogUpdClause(cl);
Term t = lcl->ClSource->Entry;
if (IsVarTerm(t)) {
clause->Tag = (CELL)NULL;
} else if (IsApplTerm(t)) {
CELL *pt = RepAppl(t);
clause->Tag = AbsAppl((CELL *)pt[0]);
if (IsExtensionFunctor(FunctorOfTerm(t))) {
clause->u.t_ptr = t;
} else {
clause->u.c_sreg = pt;
}
} else if (IsPairTerm(t)) {
CELL *pt = RepPair(t);
clause->Tag = AbsPair(NULL);
clause->u.c_sreg = pt-1;
} else {
clause->Tag = t;
}
} else {
clause->Tag = (CELL)NULL;
}
return;
default:
clause->Tag = (CELL)NULL;
return;
}
}
}
static void
move_next(ClauseDef *clause, UInt regno)
{
yamop *cl = clause->CurrentCode;
wamreg wreg = Yap_regnotoreg(regno);
op_numbers op = Yap_op_from_opcode(cl->opc);
switch (op) {
case _p_db_ref_x:
case _p_float_x:
if (wreg == cl->u.x.x) {
clause->CurrentCode = NEXTOP(cl,x);
}
return;
case _get_list:
if (wreg == cl->u.x.x) {
clause->CurrentCode = NEXTOP(cl,x);
}
return;
case _glist_valx:
case _gl_void_vary:
case _gl_void_valy:
case _gl_void_varx:
case _gl_void_valx:
case _glist_valy:
return;
case _get_atom:
if (wreg == cl->u.xc.x) {
clause->CurrentCode = NEXTOP(cl,xc);
}
return;
case _get_2atoms:
return;
case _get_3atoms:
return;
case _get_4atoms:
return;
case _get_5atoms:
return;
case _get_6atoms:
return;
/*
matching is not guaranteed:
case _get_float:
case _get_longint:
case _get_bigint:
*/
case _get_struct:
if (wreg == cl->u.xf.x) {
clause->CurrentCode = NEXTOP(cl,xf);
}
default:
clause->CurrentCode = clause->Code;
return;
}
}
static void
add_arg_info(ClauseDef *clause, PredEntry *ap, UInt argno)
{
yamop *cl;
if (ap->ModuleOfPred == IDB_MODULE) {
cl = clause->Code;
} else {
cl = clause->u.WorkPC;
}
while (TRUE) {
op_numbers op = Yap_op_from_opcode(cl->opc);
switch (op) {
case _glist_valx:
if (argno == 1) {
clause->Tag = (CELL)NULL;
return;
}
argno--;
cl = NEXTOP(cl,xx);
break;
case _gl_void_vary:
case _gl_void_valy:
case _gl_void_varx:
case _gl_void_valx:
clause->Tag = (CELL)NULL;
return;
case _glist_valy:
if (argno == 1) {
clause->Tag = (CELL)NULL;
return;
}
argno--;
cl = NEXTOP(cl,xy);
break;
case _unify_l_x_var:
case _unify_l_x_val:
case _unify_l_x_loc:
case _unify_x_var:
case _unify_x_val:
case _unify_x_loc:
if (argno == 1) {
clause->Tag = (CELL)NULL;
return;
}
argno--;
case _unify_l_x_var_write:
case _unify_l_x_val_write:
case _unify_l_x_loc_write:
case _unify_x_var_write:
case _unify_x_val_write:
case _unify_x_loc_write:
cl = NEXTOP(cl,ox);
break;
case _save_pair_x_write:
case _save_pair_x:
case _save_appl_x_write:
case _save_appl_x:
cl = NEXTOP(cl,ox);
break;
case _unify_l_x_var2:
case _unify_x_var2:
if (argno == 1 || argno == 2) {
clause->Tag = (CELL)NULL;
return;
}
argno -= 2;
case _unify_l_x_var2_write:
case _unify_x_var2_write:
cl = NEXTOP(cl,oxx);
break;
case _unify_y_var:
case _unify_y_val:
case _unify_y_loc:
case _unify_l_y_var:
case _unify_l_y_val:
case _unify_l_y_loc:
/* we're just done with the head of a list, but there
is nothing inside.
*/
if (argno == 1) {
clause->Tag = (CELL)NULL;
return;
}
argno--;
case _unify_y_var_write:
case _unify_y_val_write:
case _unify_y_loc_write:
case _unify_l_y_var_write:
case _unify_l_y_val_write:
case _unify_l_y_loc_write:
cl = NEXTOP(cl,oy);
break;
case _save_pair_y_write:
case _save_pair_y:
case _save_appl_y_write:
case _save_appl_y:
cl = NEXTOP(cl,oy);
break;
case _unify_l_void:
case _unify_void:
if (argno == 1) {
clause->Tag = (CELL)NULL;
return;
}
argno--;
case _unify_l_void_write:
case _unify_void_write:
cl = NEXTOP(cl,o);
break;
case _unify_list:
case _unify_l_list:
if (argno == 1) {
clause->Tag = AbsPair(NULL);
clause->u.WorkPC = NEXTOP(cl,o);
return;
}
argno += 1; /* 2-1: have two extra arguments to skip */
case _unify_list_write:
case _unify_l_list_write:
cl = NEXTOP(cl,o);
break;
case _unify_n_voids:
case _unify_l_n_voids:
if (argno <= cl->u.os.s) {
clause->Tag = (CELL)NULL;
return;
}
argno -= cl->u.os.s;
case _unify_n_voids_write:
case _unify_l_n_voids_write:
cl = NEXTOP(cl,os);
break;
case _unify_atom:
case _unify_l_atom:
if (argno == 1) {
clause->Tag = cl->u.oc.c;
return;
}
argno--;
case _unify_atom_write:
case _unify_l_atom_write:
cl = NEXTOP(cl,oc);
break;
case _unify_float:
case _unify_l_float:
if (argno == 1) {
clause->Tag = AbsAppl((CELL *)FunctorDouble);
clause->u.t_ptr = cl->u.oc.c;
return;
}
cl = NEXTOP(cl,oc);
argno--;
break;
case _unify_longint:
case _unify_l_longint:
if (argno == 1) {
clause->Tag = AbsAppl((CELL *)FunctorLongInt);
clause->u.t_ptr = cl->u.oc.c;
return;
}
argno--;
cl = NEXTOP(cl,oc);
break;
case _unify_bigint:
case _unify_l_bigint:
if (argno == 1) {
#ifdef USE_GMP
clause->Tag = AbsAppl((CELL *)FunctorBigInt);
#else
clause->Tag = AbsAppl((CELL *)FunctorLongInt);
#endif
clause->u.t_ptr = cl->u.oc.c;
return;
}
argno--;
break;
case _unify_n_atoms:
if (argno <= cl->u.osc.s) {
clause->Tag = cl->u.osc.c;
return;
}
argno -= cl->u.osc.s;
case _unify_n_atoms_write:
cl = NEXTOP(cl,osc);
break;
case _unify_struct:
case _unify_l_struc:
if (argno == 1) {
clause->Tag = AbsAppl((CELL *)cl->u.of.f);
clause->u.WorkPC = NEXTOP(cl,of);
return;
}
argno--;
case _unify_l_struc_write:
case _unify_struct_write:
cl = NEXTOP(cl,of);
break;
case _pop:
cl = NEXTOP(cl,e);
break;
case _pop_n:
cl = NEXTOP(cl,s);
break;
case _unify_idb_term:
case _copy_idb_term:
{
Term t = clause->u.c_sreg[argno];
if (IsVarTerm(t)) {
clause->Tag = (CELL)NULL;
} else if (IsApplTerm(t)) {
CELL *pt = RepAppl(t);
clause->Tag = AbsAppl((CELL *)pt[0]);
if (IsExtensionFunctor(FunctorOfTerm(t))) {
clause->u.t_ptr = t;
} else {
clause->u.c_sreg = pt;
}
} else if (IsPairTerm(t)) {
CELL *pt = RepPair(t);
clause->Tag = AbsPair(NULL);
clause->u.c_sreg = pt-1;
} else {
clause->Tag = t;
}
}
return;
default:
return;
}
}
}
static void
skip_to_arg(ClauseDef *clause, PredEntry *ap, UInt argno, int at_point)
{
yamop *cl;
int done = FALSE;
if (ap->ModuleOfPred == IDB_MODULE) {
return;
} else {
cl = clause->CurrentCode;
}
if (!at_point) {
clause->CurrentCode = clause->Code;
return;
}
while (!done) {
op_numbers op = Yap_op_from_opcode(cl->opc);
switch (op) {
case _unify_void:
if (argno == 1) {
clause->CurrentCode = clause->Code;
return;
} else {
argno--;
}
case _unify_void_write:
cl = NEXTOP(cl,o);
break;
case _unify_list:
case _unify_l_list:
case _unify_atom:
case _unify_l_atom:
/*
unification is not guaranteed
case _unify_longint:
case _unify_l_longint:
case _unify_bigint:
case _unify_l_bigint:
case _unify_l_float:
*/
case _unify_struct:
case _unify_l_struc:
if (cl == clause->u.WorkPC) {
clause->CurrentCode = cl;
} else {
clause->CurrentCode = clause->Code;
}
return;
case _unify_list_write:
case _unify_l_list_write:
cl = NEXTOP(cl,o);
break;
case _unify_n_voids:
case _unify_l_n_voids:
if (argno <= cl->u.os.s) {
clause->CurrentCode = clause->Code;
return;
} else {
argno -= cl->u.os.s;
}
case _unify_n_voids_write:
case _unify_l_n_voids_write:
cl = NEXTOP(cl,os);
break;
case _unify_atom_write:
case _unify_l_atom_write:
cl = NEXTOP(cl,oc);
break;
case _unify_l_struc_write:
case _unify_struct_write:
cl = NEXTOP(cl,of);
break;
case _pop:
cl = NEXTOP(cl,e);
break;
case _pop_n:
cl = NEXTOP(cl,s);
break;
default:
clause->CurrentCode = clause->Code;
return;
}
}
}
static int
valid_instructions(yamop *end, yamop *cl)
{
while (end > cl) {
op_numbers op = Yap_op_from_opcode(cl->opc);
switch (op) {
case _p_db_ref_x:
case _p_float_x:
case _get_list:
cl = NEXTOP(cl,x);
break;
case _get_atom:
cl = NEXTOP(cl,xc);
break;
case _get_2atoms:
cl = NEXTOP(cl,cc);
break;
case _get_3atoms:
cl = NEXTOP(cl,ccc);
break;
case _get_4atoms:
cl = NEXTOP(cl,cccc);
break;
case _get_5atoms:
cl = NEXTOP(cl,ccccc);
break;
case _get_6atoms:
cl = NEXTOP(cl,cccccc);
break;
case _get_struct:
cl = NEXTOP(cl,xf);
break;
case _unify_void:
case _unify_void_write:
case _unify_list:
case _unify_l_list:
case _unify_list_write:
case _unify_l_list_write:
cl = NEXTOP(cl,o);
break;
case _unify_atom:
case _unify_l_atom:
case _unify_atom_write:
case _unify_l_atom_write:
cl = NEXTOP(cl,oc);
break;
case _unify_struct:
case _unify_struct_write:
case _unify_l_struc:
case _unify_l_struc_write:
cl = NEXTOP(cl,of);
break;
case _unify_n_voids:
case _unify_l_n_voids:
case _unify_n_voids_write:
case _unify_l_n_voids_write:
cl = NEXTOP(cl,os);
break;
case _pop:
cl = NEXTOP(cl,e);
break;
case _pop_n:
cl = NEXTOP(cl,s);
break;
default:
return FALSE;
}
}
return TRUE;
}
static UInt
groups_in(ClauseDef *min, ClauseDef *max, GroupDef *grp)
{
UInt groups = 0;
while(min <= max) {
grp->FirstClause = min;
grp->AtomClauses = 0;
grp->PairClauses = 0;
grp->StructClauses = 0;
grp->TestClauses = 0;
if (min->Tag == (_var+1)*sizeof(CELL)) {
min++;
continue;
}
/* only do this for the first clauses in a group */
if (IsVarTerm(min->Tag)) {
ClauseDef *clp = min+1;
grp->VarClauses = 1;
do {
if (clp > max ||
!IsVarTerm(clp->Tag)) {
grp->LastClause = (min = clp)-1;
break;
}
if (clp->Tag != (_var+1)*sizeof(CELL))
grp->VarClauses++;
clp++;
} while (TRUE);
} else {
grp->VarClauses = 0;
do {
restart_loop:
if (IsAtomTerm(min->Tag) || IsIntTerm(min->Tag)) {
grp->AtomClauses++;
} else if (IsPairTerm(min->Tag)) {
grp->PairClauses++;
} else if (IsApplTerm(min->Tag)) {
grp->StructClauses++;
} else {
grp->TestClauses++;
}
min++;
} while (min <= max &&
(!IsVarTerm(min->Tag)));
if (min <= max && min->Tag == (_var+1)*sizeof(CELL)) {
min++;
if (min < max)
goto restart_loop;
}
grp->LastClause = min-1;
}
groups++;
grp++;
}
return groups;
}
static UInt
new_label(void)
{
UInt lbl = labelno;
labelno += 2;
return lbl;
}
static void
emit_trust(ClauseDef *cl, struct intermediates *cint, UInt nxtlbl, int clauses)
{
PredEntry *ap = cint->CurrentPred;
yamop *clcode = cl->Code;
if (ap->PredFlags & TabledPredFlag)
clcode = NEXTOP(clcode, ld);
if (ap->PredFlags & ProfiledPredFlag) {
Yap_emit(retry_profiled_op, Unsigned(ap), Zero, cint);
}
if (ap->PredFlags & CountPredFlag) {
Yap_emit(count_retry_op, Unsigned(ap), Zero, cint);
}
if (clauses == 0) {
Yap_emit(trust_op, (CELL)clcode, has_cut(cl->CurrentCode) , cint);
} else {
Yap_emit(retry_op, (CELL)clcode, (clauses << 1) | has_cut(cl->CurrentCode) , cint);
Yap_emit(jumpi_op, nxtlbl, Zero, cint);
}
}
static void
emit_retry(ClauseDef *cl, struct intermediates *cint, int clauses)
{
PredEntry *ap = cint->CurrentPred;
yamop *clcode = cl->Code;
if (ap->PredFlags & TabledPredFlag)
clcode = NEXTOP(clcode, ld);
if (ap->PredFlags & ProfiledPredFlag) {
Yap_emit(retry_profiled_op, Unsigned(ap), Zero, cint);
}
if (ap->PredFlags & CountPredFlag) {
Yap_emit(count_retry_op, Unsigned(ap), Zero, cint);
}
Yap_emit(retry_op, (CELL)clcode, (clauses << 1) | has_cut(cl->CurrentCode), cint);
}
static compiler_vm_op
emit_optry(int var_group, int first, int clauses, int clleft, PredEntry *ap)
{
/* var group */
if (var_group || clauses == 0) {
if (first) {
return try_op;
} else if (clleft+clauses) {
return retry_op;
} else {
return trust_op;
}
} else if (clleft == 0) {
#ifdef TABLING
if (ap->PredFlags & TabledPredFlag && !first) {
/* we never actually get to remove the last choice-point in this case */
return retry_op;
} else
#endif /* TABLING */
{
/* last group */
return try_op;
}
} else {
/* nonvar group */
return try_in_op;
}
}
static void
emit_try(ClauseDef *cl, struct intermediates *cint, int var_group, int first, int clauses, int clleft, UInt nxtlbl)
{
PredEntry *ap = cint->CurrentPred;
yamop *clcode = cl->CurrentCode;
compiler_vm_op comp_op;
if (ap->PredFlags & TabledPredFlag) {
clcode = NEXTOP(cl->Code, ld);
}
comp_op = emit_optry(var_group, first, clauses, clleft, cint->CurrentPred);
Yap_emit(comp_op, (CELL)clcode, ((clauses+clleft) << 1) | has_cut(cl->CurrentCode), cint);
}
static TypeSwitch *
emit_type_switch(compiler_vm_op op, struct intermediates *cint)
{
return (TypeSwitch *)Yap_emit_extra_size(op, 0, sizeof(TypeSwitch), cint);
}
static yamop *
emit_switch_space(UInt n, UInt item_size, struct intermediates *cint)
{
PredEntry *ap = cint->CurrentPred;
if (ap->PredFlags & LogUpdatePredFlag) {
UInt sz = sizeof(LogUpdIndex)+n*item_size;
LogUpdIndex *cl = (LogUpdIndex *)Yap_AllocCodeSpace(sz);
if (cl == NULL) {
/* grow stack */
save_machine_regs();
longjmp(cint->CompilerBotch,2);
}
cl->ClFlags = SwitchTableMask|LogUpdMask;
cl->ClSize = sz;
cl->ClPred = cint->CurrentPred;
/* insert into code chain */
#ifdef LOW_PROF
if (ProfilerOn &&
Yap_OffLineProfiler) {
Yap_inform_profiler_of_clause(cl->ClCode, (yamop*)((CODEADDR)cl+sz), ap, 1);
}
#endif /* LOW_PROF */
return cl->ClCode;
} else {
UInt sz = sizeof(StaticIndex)+n*item_size;
StaticIndex *cl = (StaticIndex *)Yap_AllocCodeSpace(sz);
if (cl == NULL) {
/* grow stack */
save_machine_regs();
longjmp(cint->CompilerBotch,2);
}
cl->ClFlags = SwitchTableMask;
cl->ClSize = sz;
cl->ClPred = cint->CurrentPred;
#ifdef LOW_PROF
if (ProfilerOn &&
Yap_OffLineProfiler) {
Yap_inform_profiler_of_clause(cl->ClCode, (yamop*)((CODEADDR)cl+sz), ap, 1);
}
#endif /* LOW_PROF */
return cl->ClCode;
/* insert into code chain */
}
}
static AtomSwiEntry *
emit_cswitch(int n, UInt fail_l, struct intermediates *cint)
{
compiler_vm_op op;
AtomSwiEntry *target;
if (n > MIN_HASH_ENTRIES) {
int cases = MIN_HASH_ENTRIES, i;
n += 1+n/4;
while (cases < n) cases *= 2;
n = cases;
op = switch_c_op;
target = (AtomSwiEntry *)emit_switch_space(n, sizeof(AtomSwiEntry), cint);
for (i=0; i<n; i++) {
target[i].Tag = Zero;
target[i].Label = fail_l;
}
Yap_emit(op, Unsigned(n), (CELL)target, cint);
} else {
UInt i;
op = if_c_op;
target = (AtomSwiEntry *)emit_switch_space(n+1, sizeof(AtomSwiEntry), cint);
for (i=0; i<n; i++) {
target[i].Label = fail_l;
}
target[n].Tag = Zero;
target[n].Label = fail_l;
Yap_emit(op, Unsigned(n), (CELL)target, cint);
}
return target;
}
static AtomSwiEntry *
lookup_c_hash(Term t, yamop *tab, COUNT entries)
{
AtomSwiEntry *cebase = (AtomSwiEntry *)tab;
int hash, d;
AtomSwiEntry *centry;
hash = (t >> HASH_SHIFT) & (entries-1);
centry = cebase + hash;
d = (entries-1) & (t|1);
while (centry->Tag != t) {
if (centry->Tag == 0L)
return centry;
hash = (hash + d) & (entries-1);
centry = cebase + hash;
}
return centry;
}
static AtomSwiEntry *
fetch_centry(AtomSwiEntry *cebase, Term wt, int i, int n)
{
if (n > MIN_HASH_ENTRIES) {
int cases = MIN_HASH_ENTRIES;
n += 1+n/4;
while (cases < n) cases *= 2;
return lookup_c_hash(wt, (yamop *)cebase, cases);
} else {
return cebase + i;
}
}
static FuncSwiEntry *
emit_fswitch(int n, UInt fail_l, struct intermediates *cint)
{
compiler_vm_op op;
FuncSwiEntry *target;
if (n > MIN_HASH_ENTRIES) {
int cases = MIN_HASH_ENTRIES, i;
n += 1+n/4;
while (cases < n) cases *= 2;
n = cases;
op = switch_f_op;
target = (FuncSwiEntry *)emit_switch_space(n, sizeof(FuncSwiEntry), cint);
for (i=0; i<n; i++) {
target[i].Tag = NULL;
target[i].Label = fail_l;
}
Yap_emit(op, Unsigned(n), (CELL)target, cint);
} else {
UInt i;
op = if_f_op;
target = (FuncSwiEntry *)emit_switch_space(n+1, sizeof(FuncSwiEntry), cint);
for (i=0; i<n; i++) {
target[i].Label = fail_l;
}
target[n].Tag = NULL;
target[n].Label = fail_l;
Yap_emit(op, Unsigned(n), (CELL)target, cint);
}
return target;
}
static FuncSwiEntry *
lookup_f_hash(Functor f, yamop *tab, COUNT entries)
{
FuncSwiEntry *febase = (FuncSwiEntry *)tab;
int hash, d;
FuncSwiEntry *fentry;
Term wt = (Term)f;
hash = (wt >> HASH_SHIFT) & (entries-1);
fentry = febase + hash;
d = (entries-1) & (wt|1);
while (fentry->Tag != f) {
if (fentry->Tag == NULL)
return fentry;
hash = (hash + d) & (entries-1);
fentry = febase + hash;
}
return fentry;
}
static FuncSwiEntry *
fetch_fentry(FuncSwiEntry *febase, Functor ft, int i, int n)
{
if (n > MIN_HASH_ENTRIES) {
int cases = MIN_HASH_ENTRIES;
n += 1+n/4;
while (cases < n) cases *= 2;
return lookup_f_hash(ft, (yamop *)febase, cases);
} else {
return febase + i;
}
}
/* we assume there is at least one clause, that is, c0 < cf */
static UInt
do_var_clauses(ClauseDef *c0, ClauseDef *cf, int var_group, struct intermediates *cint, int first, int clleft, UInt nxtlbl, UInt argno0) {
UInt labl;
UInt labl_dyn0 = 0, labl_dynf = 0;
labl = new_label();
Yap_emit(label_op, labl, Zero, cint);
/*
add expand_node if var_group == TRUE (jump on var) ||
var_group == FALSE (leaf node)
*/
if (first &&
cint->CurrentPred->PredFlags & LogUpdatePredFlag) {
UInt ncls;
labl_dyn0 = new_label();
if (clleft)
labl_dynf = labl_dyn0;
else
labl_dynf = new_label();
if (clleft == 0) /* trust*/
ncls = (cf-c0)+1;
else
ncls = 0;
Yap_emit_3ops(enter_lu_op, labl_dyn0, labl_dynf, ncls, cint);
/* get some placeholders */
Yap_emit(jump_op, labl_dyn0, Zero, cint);
Yap_emit(jump_op, labl_dyn0, Zero, cint);
Yap_emit(jump_op, labl_dyn0, Zero, cint);
Yap_emit(jump_op, labl_dyn0, Zero, cint);
Yap_emit(label_op, labl_dyn0, Zero, cint);
}
if (c0 == cf) {
emit_try(c0, cint, var_group, first, 0, clleft, nxtlbl);
} else {
if (c0 < cf) {
emit_try(c0, cint, var_group, first, cf-c0, clleft, nxtlbl);
}
c0++;
while (c0 < cf) {
emit_retry(c0, cint, clleft+(cf-c0));
c0++;
}
if (c0 == cf) {
emit_trust(c0, cint, nxtlbl, clleft);
if (!clleft &&
cint->CurrentPred->PredFlags & LogUpdatePredFlag) {
Yap_emit(label_op, labl_dynf, Zero, cint);
/* get some placeholders */
Yap_emit(jump_op, labl_dynf, Zero, cint);
Yap_emit(jump_op, labl_dynf, Zero, cint);
Yap_emit(jump_op, labl_dynf, Zero, cint);
Yap_emit(jump_op, labl_dynf, Zero, cint);
}
}
}
return labl;
}
static UInt
do_var_group(GroupDef *grp, struct intermediates *cint, int var_group, int first, int clleft, UInt nxtlbl, UInt argno0) {
return do_var_clauses(grp->FirstClause, grp->LastClause, var_group, cint, first, clleft, nxtlbl, argno0);
}
/* count the number of different constants */
static UInt
count_consts(GroupDef *grp)
{
Term current = MkAtomTerm(AtomFoundVar);
UInt i = 0;
ClauseDef *cl = grp->FirstClause;
while (IsAtomTerm(cl->Tag) || IsIntTerm(cl->Tag)) {
if (current != cl->Tag) {
i++;
current = cl->Tag;
}
if (cl == grp->LastClause) {
return i;
}
cl++;
}
return i;
}
static UInt
count_blobs(GroupDef *grp)
{
Term current = MkAtomTerm(AtomFoundVar);
UInt i = 0;
ClauseDef *cl = grp->FirstClause;
while (TRUE) {
if (current != cl->Tag) {
i++;
current = cl->Tag;
}
if (cl == grp->LastClause) {
return i;
}
cl++;
}
return i;
}
/* count the number of different constants */
static UInt
count_funcs(GroupDef *grp)
{
Term current = MkAtomTerm(AtomFoundVar);
UInt i = 0;
ClauseDef *cl = grp->FirstClause;
while (IsApplTerm(cl->Tag)) {
if (current != cl->Tag) {
i++;
current = cl->Tag;
}
if (cl == grp->LastClause) {
return i;
}
cl++;
}
return i;
}
static UInt
emit_single_switch_case(ClauseDef *min, struct intermediates *cint, int first, int clleft, UInt nxtlbl)
{
#ifdef TABLING
if (cint->CurrentPred->PredFlags & TabledPredFlag) {
/* with tabling we don't clean trust at the very end of computation.
*/
if (clleft == 0 && !first) {
UInt lbl = new_label();
Yap_emit(label_op, lbl, Zero, cint);
/* vsc: should check if this condition is sufficient */
emit_trust(min, cint, nxtlbl, clleft);
return lbl;
} else if (clleft) {
/*
if we still have clauses left, means we already created a CP,
so I should avoid creating again
*/
return (UInt)NEXTOP(min->CurrentCode,ld);
}
}
#endif /* TABLING */
return (UInt)(min->CurrentCode);
}
static UInt
suspend_indexing(ClauseDef *min, ClauseDef *max, PredEntry *ap, struct intermediates *cint)
{
UInt tcls = ap->cs.p_code.NOfClauses;
UInt cls = (max-min)+1;
if (cint->expand_block &&
cint->expand_block != (yamop *)(&(ap->cs.p_code.ExpandCode)) &&
cint->expand_block->u.sp.s2 < 2*(max-min)) {
cint->expand_block->u.sp.s3++;
return (UInt)(cint->expand_block);
}
if (cls < tcls/8) {
yamop *ncode;
yamop **st;
UInt tels;
UInt sz;
if (ap->PredFlags & LogUpdatePredFlag) {
/* give it some slack */
tels = cls + 4;
} else {
tels = cls;
}
sz = (UInt)NEXTOP((yamop *)NULL,sp)+tels*sizeof(yamop *), sz;
#if DEBUG
Yap_expand_clauses_sz += sz;
#endif
if ((ncode = (yamop *)Yap_AllocCodeSpace(sz)) == NULL) {
save_machine_regs();
longjmp(cint->CompilerBotch, 2);
}
#ifdef LOW_PROF
if (ProfilerOn &&
Yap_OffLineProfiler) {
Yap_inform_profiler_of_clause(ncode, NEXTOP(ncode,sp), ap, 1);
}
#endif /* LOW_PROF */
/* create an expand_block */
ncode->opc = Yap_opcode(_expand_clauses);
ncode->u.sp.p = ap;
ncode->u.sp.s1 = tels;
ncode->u.sp.s2 = cls;
ncode->u.sp.s3 = 1;
st = (yamop **)NEXTOP(ncode,sp);
while (min <= max) {
*st++ = min->Code;
min++;
}
while (cls < tels) {
*st++ = NULL;
cls++;
}
LOCK(ExpandClausesListLock);
ncode->u.sp.snext = ExpandClausesFirst;
ncode->u.sp.sprev = NULL;
if (ExpandClausesFirst)
ExpandClausesFirst->u.sp.sprev = ncode;
ExpandClausesFirst = ncode;
if (ExpandClausesLast == NULL)
ExpandClausesLast = ncode;
UNLOCK(ExpandClausesListLock);
return (UInt)ncode;
}
return (UInt)&(ap->cs.p_code.ExpandCode);
}
static void
recover_ecls_block(yamop *ipc)
{
ipc->u.sp.s3--;
if (!ipc->u.sp.s3) {
LOCK(ExpandClausesListLock);
if (ExpandClausesFirst == ipc)
ExpandClausesFirst = ipc->u.sp.snext;
if (ExpandClausesLast == ipc) {
ExpandClausesLast = ipc->u.sp.sprev;
}
if (ipc->u.sp.sprev) {
ipc->u.sp.sprev->u.sp.snext = ipc->u.sp.snext;
}
if (ipc->u.sp.snext) {
ipc->u.sp.snext->u.sp.sprev = ipc->u.sp.sprev;
}
UNLOCK(ExpandClausesListLock);
#if DEBUG
Yap_expand_clauses_sz -= (UInt)(NEXTOP((yamop *)NULL,sp))+ipc->u.sp.s1*sizeof(yamop *);
#endif
/* no dangling pointers for gprof */
Yap_InformOfRemoval((CODEADDR)ipc);
Yap_FreeCodeSpace((char *)ipc);
}
}
static UInt
do_var_entries(GroupDef *grp, Term t, struct intermediates *cint, UInt argno, int first, int clleft, UInt nxtlbl){
PredEntry *ap = cint->CurrentPred;
if (!IsVarTerm(t) || t != 0L) {
return suspend_indexing(grp->FirstClause, grp->LastClause, ap, cint);
}
return do_var_group(grp, cint, FALSE, first, clleft, nxtlbl, ap->ArityOfPE+1);
}
static UInt
do_consts(GroupDef *grp, Term t, struct intermediates *cint, int compound_term, CELL *sreg, UInt arity, int last_arg, UInt argno, int first, UInt nxtlbl, int clleft, CELL *top)
{
UInt n;
ClauseDef *min = grp->FirstClause;
UInt i;
UInt lbl;
/* generate a switch */
AtomSwiEntry *cs;
PredEntry *ap = cint->CurrentPred;
if (!IsAtomTerm(min->Tag) && !IsIntTerm(min->Tag)) {
/* no clauses, just skip */
return nxtlbl;
}
n = count_consts(grp);
lbl = new_label();
Yap_emit(label_op, lbl, Zero, cint);
cs = emit_cswitch(n, (UInt)FAILCODE, cint);
for (i = 0; i < n; i++) {
AtomSwiEntry *ics;
ClauseDef *max = min;
ics = fetch_centry(cs, min->Tag, i, n);
ics->Tag = min->Tag;
while ((max+1)->Tag == min->Tag &&
max != grp->LastClause) max++;
if (min != max) {
if (sreg != NULL) {
if (ap->PredFlags & LogUpdatePredFlag && max > min)
ics->Label = suspend_indexing(min, max, ap, cint);
else
ics->Label = do_compound_index(min, max, sreg, cint, compound_term, arity, argno, nxtlbl, first, last_arg, clleft, top, TRUE);
} else if (ap->PredFlags & LogUpdatePredFlag) {
ics->Label = suspend_indexing(min, max, cint->CurrentPred, cint);
} else {
ics->Label = do_index(min, max, cint, argno+1, nxtlbl, first, clleft, top);
}
} else {
ics->Label = do_index(min, max, cint, argno+1, nxtlbl, first, clleft, top);
}
grp->FirstClause = min = max+1;
}
return lbl;
}
static void
do_blobs(GroupDef *grp, Term t, struct intermediates *cint, UInt argno, int first, UInt nxtlbl, int clleft, CELL *top)
{
UInt n;
ClauseDef *min = grp->FirstClause;
UInt i;
/* generate a switch */
AtomSwiEntry *cs;
PredEntry *ap = cint->CurrentPred;
n = count_blobs(grp);
cs = emit_cswitch(n, nxtlbl, cint);
for (i = 0; i < n; i++) {
AtomSwiEntry *ics;
ClauseDef *max = min;
ics = fetch_centry(cs, min->Tag, i, n);
ics->Tag = min->Tag;
while ((max+1)->Tag == min->Tag &&
max != grp->LastClause) max++;
if (min != max &&
(ap->PredFlags & LogUpdatePredFlag)) {
ics->Label = suspend_indexing(min, max, ap, cint);
} else {
ics->Label = do_index(min, max, cint, argno+1, nxtlbl, first, clleft, top);
}
grp->FirstClause = min = max+1;
}
}
static UInt
do_funcs(GroupDef *grp, Term t, struct intermediates *cint, UInt argno, int first, int last_arg, UInt nxtlbl, int clleft, CELL *top)
{
UInt n = count_funcs(grp);
ClauseDef *min = grp->FirstClause;
UInt i;
FuncSwiEntry *fs;
UInt lbl;
if (min > grp->LastClause || n == 0) {
/* no clauses, just skip */
return nxtlbl;
}
lbl = new_label();
Yap_emit(label_op, lbl, Zero, cint);
/* generate a switch */
fs = emit_fswitch(n, (UInt)FAILCODE, cint);
for (i = 0; i < n ; i++) {
Functor f = (Functor)RepAppl(min->Tag);
FuncSwiEntry *ifs;
ClauseDef *max = min;
ifs = fetch_fentry(fs, f, i, n);
ifs->Tag = f;
while ((max+1)->Tag == min->Tag &&
max != grp->LastClause) max++;
/* delay non-trivial indexing
if (min != max &&
!IsExtensionFunctor(f)) {
ifs->Label = suspend_indexing(min, max, ap, cint);
} else
*/
if (IsExtensionFunctor(f)) {
if (f == FunctorDBRef)
ifs->Label = do_dbref_index(min, max, t, cint, argno, nxtlbl, first, clleft, top);
else
ifs->Label = do_blob_index(min, max, t, cint, argno, nxtlbl, first, clleft, top);
} else {
CELL *sreg;
if (!IsVarTerm(t) && IsApplTerm(t) && FunctorOfTerm(t) == f) {
sreg = RepAppl(t)+1;
} else {
sreg = NULL;
}
ifs->Label = do_compound_index(min, max, sreg, cint, 0, ArityOfFunctor(f), argno, nxtlbl, first, last_arg, clleft, top, TRUE);
}
grp->FirstClause = min = max+1;
}
return lbl;
}
static UInt
do_pair(GroupDef *grp, Term t, struct intermediates *cint, UInt argno, int first, int last_arg, UInt nxtlbl, int clleft, CELL *top)
{
ClauseDef *min = grp->FirstClause;
ClauseDef *max = grp->FirstClause;
while (IsPairTerm(max->Tag) && max != grp->LastClause) {
max++;
}
if (!IsPairTerm(max->Tag)) {
max--;
}
if (min > grp->LastClause) {
/* no clauses, just skip */
return nxtlbl;
}
grp->FirstClause = max+1;
if (min == max) {
/* single clause, no need to do indexing, but we do know it is a list */
return (UInt)(min->CurrentCode);
}
if (min != max && !IsPairTerm(t)) {
return suspend_indexing(min, max, cint->CurrentPred, cint);
}
return do_compound_index(min, max, (IsPairTerm(t) ? RepPair(t) : NULL), cint, 0, 2, argno, nxtlbl, first, last_arg, clleft, top, TRUE);
}
static void
group_prologue(int compound_term, UInt argno, int first, struct intermediates *cint)
{
if (compound_term) {
Yap_emit(cache_sub_arg_op, compound_term-1, compound_term-1, cint);
} else {
if (!first || argno != 1) {
Yap_emit(cache_arg_op, argno, argno, cint);
}
}
}
/* make sure that we can handle failure correctly */
static void
emit_protection_choicepoint(int first, int clleft, UInt nxtlbl, struct intermediates *cint)
{
if (first) {
if (clleft) {
if (cint->CurrentPred->PredFlags & LogUpdatePredFlag) {
UInt labl = new_label();
Yap_emit_3ops(enter_lu_op, labl, labl, 0, cint);
Yap_emit(label_op, labl, Zero, cint);
}
Yap_emit(tryme_op, nxtlbl, (clleft << 1), cint);
}
} else {
/* !first */
if (clleft) {
Yap_emit(retryme_op, nxtlbl, (clleft << 1), cint);
#ifdef TABLING
} else if ((cint->CurrentPred->PredFlags & TabledPredFlag)) {
/*
we cannot get rid of the choice-point for tabled predicates, all
kinds of hell would follow, so we just keep it around: not nice,
but should work.
*/
Yap_emit(retryme_op, (CELL)TRUSTFAILCODE, 0, cint);
#endif /* TABLING */
} else {
Yap_emit(trustme_op, 0, 0, cint);
}
}
}
static ClauseDef *
cls_move(ClauseDef *min, PredEntry *ap, ClauseDef *max, int compound_term, UInt argno, int last_arg)
{
ClauseDef *cl=min;
cl = min;
if (compound_term) {
while (cl <= max) {
skip_to_arg(cl, ap, compound_term, last_arg );
cl++;
}
} else {
while (cl <= max) {
if (cl->Tag == (_var+1)*sizeof(CELL)) {
ClauseDef *cli = cl;
while (cli < max) {
clcpy(cli,cli+1);
cli++;
}
max--;
} else {
move_next(cl, argno);
}
cl++;
}
}
return max;
}
static void
purge_pvar(GroupDef *group) {
ClauseDef *max = group->LastClause;
ClauseDef *cl = group->FirstClause;
while (cl <= max) {
if (cl->Tag == (_var+1)*sizeof(CELL)) {
ClauseDef *cli = cl;
while (cli < max) {
clcpy(cli,cli+1);
cli++;
}
group->VarClauses--;
max--;
}
cl++;
}
group->LastClause = max;
}
static UInt *
do_nonvar_group(GroupDef *grp, Term t, UInt compound_term, CELL *sreg, UInt arity, UInt labl, struct intermediates *cint, UInt argno, int first, int last_arg, UInt nxtlbl, int clleft, CELL *top) {
TypeSwitch *type_sw;
PredEntry *ap = cint->CurrentPred;
/* move cl pointer */
if (grp->AtomClauses + grp->PairClauses + grp->StructClauses > 1) {
Yap_emit(label_op, labl, Zero, cint);
if (argno == 1 && !compound_term) {
emit_protection_choicepoint(first, clleft, nxtlbl, cint);
}
group_prologue(compound_term, argno, first, cint);
if (grp->LastClause < grp->FirstClause) { /* only tests */
return NULL;
}
type_sw = emit_type_switch(switch_on_type_op, cint);
/* have these first so that we will have something initialised here */
type_sw->ConstEntry =
type_sw->FuncEntry =
type_sw->PairEntry =
type_sw->VarEntry =
nxtlbl;
type_sw->VarEntry = do_var_entries(grp, t, cint, argno, first, clleft, nxtlbl);
grp->LastClause = cls_move(grp->FirstClause, ap, grp->LastClause, compound_term, argno, last_arg);
sort_group(grp,top,cint);
while (grp->FirstClause <= grp->LastClause) {
if (IsAtomOrIntTerm(grp->FirstClause->Tag)) {
type_sw->ConstEntry = do_consts(grp, t, cint, compound_term, sreg, arity, last_arg, argno, first, nxtlbl, clleft, top);
} else if (IsApplTerm(grp->FirstClause->Tag)) {
type_sw->FuncEntry = do_funcs(grp, t, cint, argno, first, last_arg, nxtlbl, clleft, top);
} else {
type_sw->PairEntry = do_pair(grp, t, cint, argno, first, last_arg, nxtlbl, clleft, top);
}
}
return &(type_sw->VarEntry);
} else {
Yap_emit(label_op,labl,Zero, cint);
do_var_group(grp, cint, TRUE, first, clleft, nxtlbl, ap->ArityOfPE+1);
return NULL;
}
}
static UInt
do_optims(GroupDef *group, int ngroups, UInt fail_l, ClauseDef *min, struct intermediates *cint)
{
if (ngroups==2 && group[0].FirstClause == group[0].LastClause &&
group[0].AtomClauses == 1 && group[1].VarClauses == 1) {
CELL *sp;
UInt labl;
labl = new_label();
sp = Yap_emit_extra_size(if_not_op, Zero, 4*CellSize, cint);
sp[0] = (CELL)(group[0].FirstClause->Tag);
sp[1] = (CELL)(group[1].FirstClause->Code);
sp[2] = do_var_clauses(group[0].FirstClause, group[1].LastClause, FALSE, cint, TRUE, 0, (CELL)FAILCODE, cint->CurrentPred->ArityOfPE+1);
sp[3] = do_var_clauses(min, group[1].LastClause, FALSE, cint, TRUE, 0, (CELL)FAILCODE, cint->CurrentPred->ArityOfPE+1);
return labl;
}
return fail_l;
}
static int
cls_info(ClauseDef *min, ClauseDef *max, UInt argno)
{
ClauseDef *cl=min;
int found_pvar = FALSE;
while (cl <= max) {
add_info(cl, argno);
if (cl->Tag == (_var+1)*sizeof(CELL)) {
found_pvar = TRUE;
}
/* if (IsVarTerm(cl->Tag)) cl->Tag = (CELL)NULL; */
cl++;
}
return found_pvar;
}
static int
cls_head_info(ClauseDef *min, ClauseDef *max, UInt argno)
{
ClauseDef *cl=min;
while (cl <= max) {
add_head_info(cl, argno);
/* if (IsVarTerm(cl->Tag)) cl->Tag = (CELL)NULL; */
cl++;
}
return FALSE;
}
static UInt
do_index(ClauseDef *min, ClauseDef* max, struct intermediates *cint, UInt argno, UInt fail_l, int first, int clleft, CELL *top)
{
UInt ngroups, found_pvar = FALSE;
UInt i = 0;
GroupDef *group = (GroupDef *)top;
UInt labl, labl0, lablx;
Term t;
/* remember how we entered here */
UInt argno0 = argno;
PredEntry *ap = cint->CurrentPred;
yamop *eblk = cint->expand_block;
if (min == max) {
/* base case, just commit to the current code */
return emit_single_switch_case(min, cint, first, clleft, fail_l);
}
if ((argno > 1 && yap_flags[INDEXING_MODE_FLAG] == INDEX_MODE_SINGLE) ||
yap_flags[INDEXING_MODE_FLAG] == INDEX_MODE_OFF ||
ap->ArityOfPE < argno) {
return do_var_clauses(min, max, FALSE, cint, first, clleft, fail_l, ap->ArityOfPE+1);
}
t = Deref(XREGS[argno]);
if (ap->PredFlags & LogUpdatePredFlag) {
found_pvar = cls_head_info(min, max, argno);
} else {
found_pvar = cls_info(min, max, argno);
}
ngroups = groups_in(min, max, group);
if (IsVarTerm(t)) {
lablx = new_label();
Yap_emit(label_op, lablx, Zero, cint);
while (IsVarTerm(t)) {
if (ngroups > 1 || !group->VarClauses) {
UInt susp_lab = suspend_indexing(min, max, ap, cint);
if (!cint->expand_block) {
cint->expand_block = (yamop *)susp_lab;
}
Yap_emit(jump_nv_op, susp_lab, argno, cint);
}
if (argno == ap->ArityOfPE ||
yap_flags[INDEXING_MODE_FLAG] == INDEX_MODE_SINGLE) {
do_var_clauses(min, max, FALSE, cint, first, clleft, fail_l, argno0);
cint->expand_block = eblk;
return lablx;
}
argno++;
t = Deref(XREGS[argno]);
if (ap->PredFlags & LogUpdatePredFlag) {
found_pvar = cls_head_info(min, max, argno);
} else {
found_pvar = cls_info(min, max, argno);
}
ngroups = groups_in(min, max, group);
}
labl0 = labl = new_label();
} else {
lablx = labl0 = labl = new_label();
}
cint->expand_block = eblk;
top = (CELL *)(group+ngroups);
if (argno > 1) {
/* don't try being smart for other arguments than the first */
if (ngroups > 1 || group->VarClauses != 0 || found_pvar) {
if (ap->ArityOfPE == argno) {
return do_var_clauses(min, max, FALSE, cint, first, clleft, fail_l, ap->ArityOfPE+1);
} else {
return do_index(min, max, cint, argno+1, fail_l, first, clleft, top);
}
} else {
ClauseDef *cl = min;
/*
need to reset the code pointer, otherwise I could be in
the middle of a compound term.
*/
while (cl <= max) {
cl->CurrentCode = cl->Code;
cl++;
}
}
} else {
UInt special_options;
if ((ap->PredFlags & LogUpdatePredFlag) && ngroups > 1) {
/* make sure we only expand at a single point */
if (group[0].VarClauses && ngroups > 3) {
int ncls = group[ngroups-1].LastClause-group[2].FirstClause;
group[2].VarClauses += ncls;
group[2].LastClause = group[ngroups-1].LastClause;
ngroups = 3;
} else if (!group[0].VarClauses && ngroups > 2) {
int ncls = group[ngroups-1].LastClause-group[1].FirstClause;
group[1].VarClauses += ncls;
group[1].LastClause = group[ngroups-1].LastClause;
ngroups = 2;
}
} else if ((special_options = do_optims(group, ngroups, fail_l, min, cint)) != fail_l) {
return special_options;
}
if (ngroups == 1 && group->VarClauses && !found_pvar) {
return do_index(min, max, cint, argno+1, fail_l, first, clleft, top);
} else if (found_pvar) {
Yap_emit(label_op, labl0, Zero, cint);
labl = new_label();
Yap_emit(jump_v_op, suspend_indexing(min, max, ap, cint), Zero, cint);
}
}
for (i=0; i < ngroups; i++) {
UInt nextlbl;
int left_clauses = clleft+(max-group->LastClause);
/* a group may end up not having clauses*/
if (i < ngroups-1) {
nextlbl = new_label();
} else {
nextlbl = fail_l;
}
if (found_pvar && argno == 1) {
purge_pvar(group);
}
if (group->FirstClause==group->LastClause && first && left_clauses == 0) {
Yap_emit(jumpi_op, (CELL)(group->FirstClause->Code), Zero, cint);
} else {
if (group->VarClauses) {
Yap_emit(label_op,labl,Zero, cint);
do_var_group(group, cint, argno == 1, first, left_clauses, nextlbl, ap->ArityOfPE+1);
} else {
do_nonvar_group(group, t, 0, NULL, 0, labl, cint, argno, first, TRUE, nextlbl, left_clauses, top);
}
}
first = FALSE;
group++;
labl = nextlbl;
}
return lablx;
}
static ClauseDef *
copy_clauses(ClauseDef *max0, ClauseDef *min0, CELL *top, struct intermediates *cint)
{
UInt sz = ((max0+1)-min0)*sizeof(ClauseDef);
if ((char *)top + sz >= Yap_TrailTop-4096) {
Yap_Error_Size = sz;
/* grow stack */
save_machine_regs();
longjmp(cint->CompilerBotch,4);
}
memcpy((void *)top, (void *)min0, sz);
return (ClauseDef *)top;
}
/* execute an index inside a structure */
static UInt
do_compound_index(ClauseDef *min0, ClauseDef* max0, Term* sreg, struct intermediates *cint, UInt i, UInt arity, UInt argno, UInt fail_l, int first, int last_arg, int clleft, CELL *top, int done_work)
{
UInt ret_lab = 0, *newlabp;
CELL *top0 = top;
ClauseDef *min, *max;
PredEntry *ap = cint->CurrentPred;
int found_index = FALSE, lu_pred = ap->PredFlags & LogUpdatePredFlag;
newlabp = & ret_lab;
if (min0 == max0) {
/* base case, just commit to the current code */
return emit_single_switch_case(min0, cint, first, clleft, fail_l);
}
if (yap_flags[INDEXING_MODE_FLAG] == INDEX_MODE_SINGLE) {
*newlabp =
do_var_clauses(min0, max0, FALSE, cint, first, clleft, fail_l, ap->ArityOfPE+1);
return ret_lab;
}
if (sreg == NULL) {
return suspend_indexing(min0, max0, ap, cint);
}
while (i < arity && !found_index) {
ClauseDef *cl;
GroupDef *group;
UInt ngroups;
int isvt = IsVarTerm(Deref(sreg[i]));
min = copy_clauses(max0, min0, top, cint);
max = min+(max0-min0);
top = (CELL *)(max+1);
cl = min;
/* search for a subargument */
while (cl <= max) {
add_arg_info(cl, ap, i+1);
cl++;
}
group = (GroupDef *)top;
ngroups = groups_in(min, max, group);
if (ngroups == 1 && group->VarClauses == 0) {
/* ok, we are doing a sub-argument */
/* process groups */
*newlabp = new_label();
top = (CELL *)(group+1);
newlabp = do_nonvar_group(group, (sreg == NULL ? 0L : Deref(sreg[i])), i+1, (isvt ? NULL : sreg), arity, *newlabp, cint, argno, argno == 1, (last_arg && i+1 == arity), fail_l, clleft, top);
if (newlabp == NULL) {
found_index = TRUE;
top = top0;
break;
}
if (sreg == NULL || !isvt) {
found_index = TRUE;
} else {
done_work |= TRUE;
}
}
top = top0;
i++;
}
if (!found_index) {
if (!lu_pred || !done_work)
*newlabp = do_index(min0, max0, cint, argno+1, fail_l, first, clleft, top);
else
*newlabp = suspend_indexing(min0, max0, ap, cint);
}
return ret_lab;
}
static UInt
do_dbref_index(ClauseDef *min, ClauseDef* max, Term t, struct intermediates *cint, UInt argno, UInt fail_l, int first, int clleft, CELL *top)
{
UInt ngroups;
GroupDef *group;
ClauseDef *cl = min;
group = (GroupDef *)top;
cl = min;
while (cl <= max) {
cl->Tag = cl->u.t_ptr;
cl++;
}
ngroups = groups_in(min, max, group);
if (ngroups > 1 || group->VarClauses) {
return do_index(min, max, cint, argno+1, fail_l, first, clleft, top);
} else {
int labl = new_label();
Yap_emit(label_op, labl, Zero, cint);
Yap_emit(index_dbref_op, Zero, Zero, cint);
sort_group(group,(CELL *)(group+1),cint);
do_blobs(group, t, cint, argno, first, fail_l, clleft, (CELL *)group+1);
return labl;
}
}
static UInt
do_blob_index(ClauseDef *min, ClauseDef* max, Term t, struct intermediates *cint, UInt argno, UInt fail_l, int first, int clleft, CELL *top)
{
UInt ngroups;
GroupDef *group;
ClauseDef *cl = min;
group = (GroupDef *)top;
cl = min;
while (cl <= max) {
if (cl->u.t_ptr == (CELL)NULL) { /* check whether it is a builtin */
cl->Tag = Zero;
} else {
cl->Tag = MkIntTerm(RepAppl(cl->u.t_ptr)[1]);
}
cl++;
}
ngroups = groups_in(min, max, group);
if (ngroups > 1 || group->VarClauses) {
return do_index(min, max, cint, argno+1, fail_l, first, clleft, top);
} else {
int labl = new_label();
Yap_emit(label_op, labl, Zero, cint);
Yap_emit(index_blob_op, Zero, Zero, cint);
sort_group(group,(CELL *)(group+1),cint);
do_blobs(group, t, cint, argno, first, fail_l, clleft, (CELL *)group+1);
return labl;
}
}
static void
init_clauses(ClauseDef *cl, PredEntry *ap)
{
if (ap->PredFlags & MegaClausePredFlag) {
MegaClause *mcl = ClauseCodeToMegaClause(ap->cs.p_code.FirstClause);
yamop *end = (yamop *)((char *)mcl->ClCode+mcl->ClSize);
yamop *cd = mcl->ClCode;
while (cd < end) {
cl->Code = cl->CurrentCode = cd;
cd = (yamop *)((char *)cd+mcl->ClItemSize);
cl++;
}
} else {
StaticClause *scl;
scl = ClauseCodeToStaticClause(ap->cs.p_code.FirstClause);
do {
cl->Code = cl->CurrentCode = scl->ClCode;
cl++;
if (scl->ClCode == ap->cs.p_code.LastClause)
return;
scl = scl->ClNext;
} while (TRUE);
}
}
static void
init_log_upd_clauses(ClauseDef *cl, PredEntry *ap)
{
LogUpdClause *lcl = ClauseCodeToLogUpdClause(ap->cs.p_code.FirstClause);
do {
cl->Code = cl->CurrentCode = lcl->ClCode;
cl++;
lcl = lcl->ClNext;
} while (lcl != NULL);
}
static UInt
compile_index(struct intermediates *cint)
{
PredEntry *ap = cint->CurrentPred;
int NClauses = ap->cs.p_code.NOfClauses;
ClauseDef *cls = (ClauseDef *)H;
CELL *top = (CELL *) TR;
/* only global variable I use directly */
labelno = 1;
Yap_Error_Size = 0;
/* reserve double the space for compiler */
if (cls+2*NClauses > (ClauseDef *)(ASP-4096)) {
/* tell how much space we need */
Yap_Error_Size += NClauses*sizeof(ClauseDef);
/* grow stack */
save_machine_regs();
longjmp(cint->CompilerBotch,3);
}
cint->freep = (char *)(cls+NClauses);
if (ap->PredFlags & LogUpdatePredFlag) {
/* throw away a label */
new_label();
init_log_upd_clauses(cls,ap);
} else {
/* prepare basic data structures */
init_clauses(cls,ap);
}
return do_index(cls, cls+(NClauses-1), cint, 1, (UInt)FAILCODE, TRUE, 0, top);
}
yamop *
Yap_PredIsIndexable(PredEntry *ap, UInt NSlots)
{
yamop *indx_out;
int setjres;
struct intermediates cint;
cint.CurrentPred = ap;
Yap_Error_Size = 0;
if ((setjres = setjmp(cint.CompilerBotch)) == 3) {
restore_machine_regs();
recover_from_failed_susp_on_cls(&cint, 0);
Yap_gcl(Yap_Error_Size, ap->ArityOfPE+NSlots, ENV, CP);
} else if (setjres == 2) {
restore_machine_regs();
Yap_Error_Size = recover_from_failed_susp_on_cls(&cint, Yap_Error_Size);
if (!Yap_growheap(FALSE, Yap_Error_Size, NULL)) {
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, Yap_ErrorMessage);
return FAILCODE;
}
} else if (setjres == 4) {
restore_machine_regs();
recover_from_failed_susp_on_cls(&cint, 0);
if (!Yap_growtrail(Yap_Error_Size, FALSE)) {
Yap_Error(OUT_OF_TRAIL_ERROR, TermNil, Yap_ErrorMessage);
return FAILCODE;
}
} else if (setjres != 0) {
restore_machine_regs();
recover_from_failed_susp_on_cls(&cint, 0);
if (!Yap_growheap(FALSE, Yap_Error_Size, NULL)) {
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, Yap_ErrorMessage);
return FAILCODE;
}
}
restart_index:
Yap_BuildMegaClause(ap);
cint.CodeStart = cint.BlobsStart = cint.cpc = cint.icpc = NULL;
cint.expand_block = NULL;
Yap_ErrorMessage = NULL;
if (compile_index(&cint) == (UInt)FAILCODE) {
return FAILCODE;
}
#ifdef DEBUG
if (Yap_Option['i' - 'a' + 1]) {
Yap_ShowCode(&cint);
}
#endif
/* globals for assembler */
IPredArity = ap->ArityOfPE;
if (cint.CodeStart) {
if ((indx_out = Yap_assemble(ASSEMBLING_INDEX, TermNil, ap, FALSE, &cint)) == NULL) {
if (!Yap_growheap(FALSE, Yap_Error_Size, NULL)) {
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, Yap_ErrorMessage);
return NULL;
}
goto restart_index;
}
} else {
return NULL;
}
if (ap->PredFlags & LogUpdatePredFlag) {
LogUpdIndex *cl = ClauseCodeToLogUpdIndex(indx_out);
cl->ClFlags |= SwitchRootMask;
}
return(indx_out);
}
static istack_entry *
reset_stack(istack_entry *sp0)
{
sp0->pos = 0;
return sp0;
}
static istack_entry *
push_stack(istack_entry *sp, Int arg, Term Tag, Term extra, struct intermediates *cint)
{
if (sp+1 > (istack_entry *)Yap_TrailTop) {
save_machine_regs();
longjmp(cint->CompilerBotch,4);
}
sp->pos = arg;
sp->val = Tag;
sp->extra = extra;
sp++;
sp->pos = 0;
return sp;
}
static istack_entry *
install_clause(ClauseDef *cls, PredEntry *ap, istack_entry *stack)
{
int last_arg = TRUE;
istack_entry *sp = stack;
last_arg = TRUE;
while (sp->pos) {
if ((Int)(sp->pos) > 0) {
add_info(cls, sp->pos);
} else if (sp->pos) {
UInt argno = -sp->pos;
add_arg_info(cls, ap, argno);
}
/* if we are not talking about a variable */
if (cls->Tag != sp->val) {
if (sp->val == 0L) {
sp++;
}
break;
} else {
if (IsApplTerm(cls->Tag)) {
Functor f = (Functor)RepAppl(cls->Tag);
if (IsExtensionFunctor(f)) {
if (f == FunctorDBRef) {
if (cls->u.t_ptr != sp->extra) break;
} else {
Term t = MkIntTerm(RepAppl(sp->extra)[1]),
t1 = MkIntTerm(RepAppl(cls->u.t_ptr)[1]);
if (t != t1) break;
}
}
}
if ((Int)(sp->pos) > 0) {
move_next(cls, sp->pos);
} else if (sp->pos) {
UInt argno = -sp->pos;
skip_to_arg(cls, ap, argno, FALSE);
if (ArityOfFunctor((Functor)RepAppl(sp[-1].val))
!= argno+1) {
last_arg = FALSE;
}
}
}
sp++;
}
return sp;
}
static ClauseDef *
install_clauses(ClauseDef *cls, PredEntry *ap, istack_entry *stack, yamop *beg, yamop *end)
{
istack_entry *sp = stack;
if (ap->PredFlags & MegaClausePredFlag) {
MegaClause *mcl = ClauseCodeToMegaClause(beg);
yamop *end = (yamop *)((char *)mcl->ClCode+mcl->ClSize);
yamop *cd = mcl->ClCode;
if (stack[0].pos == 0) {
while (TRUE) {
cls->Code = cls->CurrentCode = cd;
cls->Tag = 0;
cls++;
cd = (yamop *)((char *)cd+mcl->ClItemSize);
if (cd == end) {
return cls-1;
}
}
}
while (TRUE) {
cls->Code = cls->CurrentCode = cd;
sp = install_clause(cls, ap, stack);
/* we reached a matching clause */
if (!sp->pos && (sp[-1].val == 0L || cls->Tag == sp[-1].val)) {
cls++;
}
cd = (yamop *)((char *)cd+mcl->ClItemSize);
if (cd == end) {
return cls-1;
}
}
} else {
StaticClause *cl = ClauseCodeToStaticClause(beg);
if (stack[0].pos == 0) {
while (TRUE) {
cls->Code = cls->CurrentCode = cl->ClCode;
cls->Tag = 0;
cls++;
if (cl->ClCode == end) {
return cls-1;
}
cl = cl->ClNext;
}
}
while (TRUE) {
cls->Code = cls->CurrentCode = cl->ClCode;
sp = install_clause(cls, ap, stack);
/* we reached a matching clause */
if (!sp->pos && (sp[-1].val == 0L || cls->Tag == sp[-1].val)) {
cls++;
}
if (cl->ClCode == end || cl->ClCode == NULL) {
return cls-1;
}
cl = cl->ClNext;
}
}
}
static ClauseDef *
install_clauseseq(ClauseDef *cls, PredEntry *ap, istack_entry *stack, yamop **beg, yamop **end)
{
istack_entry *sp = stack;
if (stack[0].pos == 0) {
while (TRUE) {
if (*beg) {
cls->Code = cls->CurrentCode = *beg;
cls->Tag = 0;
cls++;
}
beg++;
if (beg == end) {
return cls-1;
}
}
}
while (TRUE) {
if (*beg) {
cls->Code = cls->CurrentCode = *beg;
sp = install_clause(cls, ap, stack);
/* we reached a matching clause */
if (!sp->pos && (sp[-1].val == 0L || cls->Tag == sp[-1].val)) {
cls++;
}
}
beg++;
if (beg == end) {
return cls-1;
}
}
}
static void
reinstall_clauses(ClauseDef *cls, ClauseDef *end, PredEntry *ap, istack_entry *stack)
{
do {
cls->CurrentCode = cls->Code;
install_clause(cls, ap, stack);
} while (cls++ != end);
}
static istack_entry *
install_log_upd_clause(ClauseDef *cls, PredEntry *ap, istack_entry *stack)
{
int last_arg = TRUE;
istack_entry *sp = stack;
last_arg = TRUE;
while (sp->pos) {
if ((Int)(sp->pos) > 0) {
add_head_info(cls, sp->pos);
} else if (sp->pos) {
UInt argno = -sp->pos;
add_arg_info(cls, ap, argno);
}
/* if we are not talking about a variable */
if (cls->Tag != sp->val) {
if (sp->val == 0L) {
sp++;
}
break;
} else {
if (IsApplTerm(cls->Tag)) {
Functor f = (Functor)RepAppl(cls->Tag);
if (IsExtensionFunctor(f)) {
if (f == FunctorDBRef) {
if (cls->u.t_ptr != sp->extra) break;
} else {
Term t = MkIntTerm(RepAppl(sp->extra)[1]),
t1 = MkIntTerm(RepAppl(cls->u.t_ptr)[1]);
if (t != t1) break;
}
}
}
if ((Int)(sp->pos) > 0) {
move_next(cls, sp->pos);
} else if (sp->pos) {
UInt argno = -sp->pos;
skip_to_arg(cls, ap, argno, FALSE);
if (ArityOfFunctor((Functor)RepAppl(sp[-1].val))
!= argno+1) {
last_arg = FALSE;
}
}
}
sp++;
}
return sp;
}
static ClauseDef *
install_log_upd_clauses(ClauseDef *cls, PredEntry *ap, istack_entry *stack, yamop *beg, yamop *end)
{
istack_entry *sp = stack;
if (stack[0].pos == 0) {
while (TRUE) {
cls->Code = cls->CurrentCode = beg;
cls->Tag = 0;
cls++;
if (beg == end || beg == NULL) {
return cls-1;
}
beg = ClauseCodeToLogUpdClause(beg)->ClNext->ClCode;
}
}
while (TRUE) {
cls->Code = cls->CurrentCode = beg;
sp = install_log_upd_clause(cls, ap, stack);
/* we reached a matching clause */
if (!sp->pos && (sp[-1].val == 0L || cls->Tag == sp[-1].val)) {
cls++;
}
if (beg == end || beg == NULL) {
return cls-1;
}
beg = ClauseCodeToLogUpdClause(beg)->ClNext->ClCode;
}
}
static ClauseDef *
install_log_upd_clauseseq(ClauseDef *cls, PredEntry *ap, istack_entry *stack, yamop **beg, yamop **end)
{
istack_entry *sp = stack;
if (stack[0].pos == 0) {
while (TRUE) {
if (beg) {
cls->Code = cls->CurrentCode = *beg;
cls->Tag = 0;
cls++;
}
beg++;
if (beg == end) {
return cls-1;
}
}
}
while (TRUE) {
if (*beg) {
cls->Code = cls->CurrentCode = *beg;
sp = install_log_upd_clause(cls, ap, stack);
/* we reached a matching clause */
if (!sp->pos && (sp[-1].val == 0L || cls->Tag == sp[-1].val)) {
cls++;
}
}
beg++;
if (beg == end) {
return cls-1;
}
}
}
static void
reinstall_log_upd_clauses(ClauseDef *cls, ClauseDef *end, PredEntry *ap, istack_entry *stack)
{
do {
cls->CurrentCode = cls->Code;
install_log_upd_clause(cls, ap, stack);
} while (cls++ != end);
}
#if PRECOMPUTE_REGADDRESS
#define arg_from_x(I) (((CELL *)(I))-XREGS)
#else
#define arg_from_x(I) (I)
#endif /* ALIGN_LONGS */
static AtomSwiEntry *
lookup_c(Term t, yamop *tab, COUNT entries)
{
AtomSwiEntry *cebase = (AtomSwiEntry *)tab;
while (cebase->Tag != t) {
entries--;
cebase++;
if (entries == 0)
return cebase;
}
return cebase;
}
static FuncSwiEntry *
lookup_f(Functor f, yamop *tab, COUNT entries)
{
FuncSwiEntry *febase = (FuncSwiEntry *)tab;
while (febase->Tag != f) {
entries--;
febase++;
if (entries == 0)
return febase;
}
return febase;
}
static COUNT
count_clauses_left(yamop *cl, PredEntry *ap)
{
if (ap->PredFlags & LogUpdatePredFlag) {
LogUpdClause *c = ClauseCodeToLogUpdClause(cl);
COUNT i = 0;
while (c != NULL) {
i++;
c = c->ClNext;
}
return i;
} else if (ap->PredFlags & MegaClausePredFlag) {
MegaClause *mcl = ClauseCodeToMegaClause(ap->cs.p_code.FirstClause);
UInt ncls = mcl->ClSize/mcl->ClItemSize;
return (ncls-1)-((char *)cl-(char *)mcl->ClCode)/mcl->ClItemSize;
} else {
yamop *last = ap->cs.p_code.LastClause;
StaticClause *c;
COUNT i = 1;
c = ClauseCodeToStaticClause(cl);
while (c->ClCode != last) {
i++;
c = c->ClNext;
}
return i;
}
}
static yamop **
expand_index(struct intermediates *cint) {
/* first clause */
PredEntry *ap = cint->CurrentPred;
yamop *first, *last = NULL, *alt = NULL;
istack_entry *stack, *sp;
ClauseDef *cls = (ClauseDef *)H, *max;
int NClauses;
/* last clause to experiment with */
yamop *ipc;
/* labp should point at the beginning of the sequence */
yamop **labp = NULL, **olabp = NULL;
Term t = TermNil, *s_reg = NULL;
int is_last_arg = TRUE;
int argno = 1;
int isfirstcl = TRUE;
/* this is will be used as a new PC */
CELL *top = (CELL *) TR;
UInt arity = 0;
UInt lab, fail_l, clleft, i = 0;
int is_lu = ap->PredFlags & LogUpdatePredFlag;
yamop *eblk = NULL;
ipc = ap->cs.p_code.TrueCodeOfPred;
first = ap->cs.p_code.FirstClause;
NClauses = ap->cs.p_code.NOfClauses;
sp = stack = (istack_entry *)top;
labelno = 1;
stack[0].pos = 0;
/* try to refine the interval using the indexing code */
while (ipc != NULL) {
op_numbers op;
op = Yap_op_from_opcode(ipc->opc);
switch(op) {
case _try_clause:
case _retry:
/* this clause had no indexing */
if (ap->PredFlags & LogUpdatePredFlag) {
first = ClauseCodeToLogUpdClause(ipc->u.ld.d)->ClNext->ClCode;
} else if (ap->PredFlags & MegaClausePredFlag) {
MegaClause *mcl = ClauseCodeToMegaClause(ap->cs.p_code.FirstClause);
first = (yamop *)((char *)ipc->u.ld.d)+mcl->ClItemSize;
} else {
first = ClauseCodeToStaticClause(ipc->u.ld.d)->ClNext->ClCode;
}
isfirstcl = FALSE;
ipc = NEXTOP(ipc,ld);
break;
#if TABLING
case _table_try:
case _table_retry:
/* this clause had no indexing */
first = ClauseCodeToStaticClause(PREVOP(ipc->u.ld.d,ld))->ClNext->ClCode;
isfirstcl = FALSE;
ipc = NEXTOP(ipc,ld);
break;
#endif /* TABLING */
case _try_clause2:
case _try_clause3:
case _try_clause4:
case _retry2:
case _retry3:
case _retry4:
case _try_in:
if (ap->PredFlags & LogUpdatePredFlag) {
first = ClauseCodeToLogUpdClause(ipc->u.l.l)->ClNext->ClCode;
} else if (ap->PredFlags & MegaClausePredFlag) {
MegaClause *mcl = ClauseCodeToMegaClause(ap->cs.p_code.FirstClause);
first = (yamop *)((char *)ipc->u.ld.d)+mcl->ClItemSize;
} else {
first = ClauseCodeToStaticClause(ipc->u.l.l)->ClNext->ClCode;
}
isfirstcl = FALSE;
ipc = NEXTOP(ipc,l);
break;
case _retry_me:
#ifdef TABLING
case _table_retry_me:
#endif
isfirstcl = FALSE;
case _try_me:
#ifdef TABLING
case _table_try_me:
#endif
/* ok, we found the start for an indexing block,
but we don't if we are going to operate here or not */
/* if we are to commit here, alt will tell us where */
alt = ipc->u.ld.d;
ipc = NEXTOP(ipc,ld);
/* start of a group, reset stack */
sp = stack;
stack[0].pos = 0;
break;
case _profiled_trust_me:
case _trust_me:
case _count_trust_me:
#ifdef TABLING
case _table_trust_me:
#endif /* TABLING */
/* we will commit to this group for sure */
ipc = NEXTOP(ipc,ld);
alt = NULL;
/* start of a group, reset stack */
sp = stack;
stack[0].pos = 0;
break;
case _trust:
/* we should never be here */
Yap_Error(INTERNAL_COMPILER_ERROR, TermNil, "found trust in expand_index");
labp = NULL;
ipc = NULL;
break;
case _stale_lu_index:
case _enter_lu_pred:
/* no useful info */
ipc = ipc->u.Ill.l1;
break;
case _trust_logical_pred:
/* no useful info */
ipc = NEXTOP(ipc,l);
break;
case _retry_profiled:
case _count_retry:
/* no useful info */
ipc = NEXTOP(ipc,l);
break;
case _jump:
/* just skip for now, but should worry about memory management */
olabp = NULL;
ipc = ipc->u.l.l;
break;
case _lock_lu:
case _procceed:
ipc = NEXTOP(ipc,p);
break;
case _unlock_lu:
ipc = NEXTOP(ipc,e);
break;
case _jump_if_var:
if (IsVarTerm(Deref(ARG1))) {
olabp = NULL;
labp = &(ipc->u.l.l);
ipc = ipc->u.l.l;
} else {
ipc = NEXTOP(ipc,l);
}
break;
case _jump_if_nonvar:
argno = arg_from_x(ipc->u.xll.x);
t = Deref(XREGS[argno]);
i = 0;
/* expand_index expects to find the new argument */
if (!IsVarTerm(t)) {
argno--;
olabp = NULL;
labp = &(ipc->u.xll.l1);
ipc = ipc->u.xll.l1;
} else {
ipc = NEXTOP(ipc,xll);
}
break;
/* instructions type EC */
/* instructions type e */
case _index_dbref:
t = AbsAppl(s_reg-1);
sp[-1].extra = t;
s_reg = NULL;
ipc = NEXTOP(ipc,e);
break;
case _index_blob:
t = MkIntTerm(s_reg[0]);
sp[-1].extra = AbsAppl(s_reg-1);
s_reg = NULL;
ipc = NEXTOP(ipc,e);
break;
/* instructions type e */
case _switch_on_type:
t = Deref(ARG1);
argno = 1;
i = 0;
if (IsVarTerm(t)) {
olabp = NULL;
labp = &(ipc->u.llll.l4);
ipc = ipc->u.llll.l4;
} else if (IsPairTerm(t)) {
sp = push_stack(sp, 1, AbsPair(NULL), TermNil, cint);
s_reg = RepPair(t);
olabp = NULL;
labp = &(ipc->u.llll.l1);
ipc = ipc->u.llll.l1;
} else if (IsApplTerm(t)) {
sp = push_stack(sp, 1, AbsAppl((CELL *)FunctorOfTerm(t)), TermNil, cint);
ipc = ipc->u.llll.l3;
} else {
sp = push_stack(sp, argno, t, TermNil, cint);
ipc = ipc->u.llll.l2;
}
break;
case _switch_list_nl:
t = Deref(ARG1);
argno = 1;
i = 0;
if (IsVarTerm(t)) {
olabp = NULL;
labp = &(ipc->u.ollll.l4);
ipc = ipc->u.ollll.l4;
} else if (IsPairTerm(t)) {
olabp = NULL;
s_reg = RepPair(t);
labp = &(ipc->u.ollll.l1);
sp = push_stack(sp, 1, AbsPair(NULL), TermNil, cint);
ipc = ipc->u.ollll.l1;
} else if (t == TermNil) {
sp = push_stack(sp, 1, t, TermNil, cint);
ipc = ipc->u.ollll.l2;
} else {
Term tn;
if (IsApplTerm(t)) {
tn = AbsAppl((CELL *)FunctorOfTerm(t));
} else {
tn = t;
}
sp = push_stack(sp, argno, tn, TermNil, cint);
ipc = ipc->u.ollll.l3;
}
break;
case _switch_on_arg_type:
argno = arg_from_x(ipc->u.xllll.x);
i = 0;
t = Deref(XREGS[argno]);
if (IsVarTerm(t)) {
olabp = NULL;
labp = &(ipc->u.xllll.l4);
ipc = ipc->u.xllll.l4;
} else if (IsPairTerm(t)) {
s_reg = RepPair(t);
olabp = NULL;
sp = push_stack(sp, argno, AbsPair(NULL), TermNil, cint);
labp = &(ipc->u.xllll.l1);
ipc = ipc->u.xllll.l1;
} else if (IsApplTerm(t)) {
sp = push_stack(sp, argno, AbsAppl((CELL *)FunctorOfTerm(t)), TermNil, cint);
ipc = ipc->u.xllll.l3;
} else {
sp = push_stack(sp, argno, t, TermNil, cint);
ipc = ipc->u.xllll.l2;
}
break;
case _switch_on_sub_arg_type:
i = ipc->u.sllll.s;
t = Deref(s_reg[i]);
if (i != arity-1) is_last_arg = FALSE;
t = Deref(s_reg[i]);
if (IsVarTerm(t)) {
olabp = NULL;
labp = &(ipc->u.sllll.l4);
ipc = ipc->u.sllll.l4;
i++;
} else if (IsPairTerm(t)) {
s_reg = RepPair(t);
sp = push_stack(sp, -i-1, AbsPair(NULL), TermNil, cint);
olabp = NULL;
labp = &(ipc->u.sllll.l1);
ipc = ipc->u.sllll.l1;
i = 0;
} else if (IsApplTerm(t)) {
sp = push_stack(sp, -i-1, AbsAppl((CELL *)FunctorOfTerm(t)), TermNil, cint);
ipc = ipc->u.sllll.l3;
i = 0;
} else {
/* We don't push stack here, instead we go over to next argument
sp = push_stack(sp, -i-1, t, cint);
*/
sp = push_stack(sp, -i-1, t, TermNil, cint);
ipc = ipc->u.sllll.l2;
i++;
}
break;
case _if_not_then:
labp = NULL;
ipc = NULL;
break;
/* instructions type ollll */
case _switch_on_func:
case _if_func:
case _go_on_func:
{
FuncSwiEntry *fe;
yamop *newpc;
Functor f;
s_reg = RepAppl(t);
f = (Functor)(*s_reg++);
if (op == _switch_on_func) {
fe = lookup_f_hash(f,ipc->u.sssl.l,ipc->u.sssl.s);
} else {
fe = lookup_f(f,ipc->u.sssl.l,ipc->u.sssl.s);
}
newpc = (yamop *)(fe->Label);
olabp = &(ipc->u.sssl.l);
labp = (yamop **)(&(fe->Label));
if (newpc == (yamop *)&(ap->cs.p_code.ExpandCode)) {
/* we found it */
ipc = NULL;
} else {
ipc = newpc;
}
}
break;
case _switch_on_cons:
case _if_cons:
case _go_on_cons:
{
AtomSwiEntry *ae;
if (op == _switch_on_cons) {
ae = lookup_c_hash(t,ipc->u.sssl.l,ipc->u.sssl.s);
} else {
ae = lookup_c(t,ipc->u.sssl.l,ipc->u.sssl.s);
}
olabp = &(ipc->u.sssl.l);
labp = (yamop **)(&(ae->Label));
if (ae->Label == (CELL)&(ap->cs.p_code.ExpandCode)) {
/* we found it */
ipc = NULL;
} else {
ipc = (yamop *)(ae->Label);
}
}
break;
case _expand_index:
case _expand_clauses:
if (alt != NULL && ap->PredFlags & LogUpdatePredFlag) {
op_numbers fop = Yap_op_from_opcode(alt->opc);
if (fop == _enter_lu_pred)
alt = alt->u.Ill.l1;
if (fop == _trust_logical_pred)
alt = NEXTOP(alt,l);
}
ipc = NULL;
break;
case _op_fail:
ipc = alt;
alt = NULL;
break;
default:
if (alt == NULL) {
Yap_Error(INTERNAL_COMPILER_ERROR,t,"unexpected instruction %d at expand_index ", op);
labp = NULL;
ipc = NULL;
} else {
/* backtrack */
first = alt->u.ld.d;
ipc = alt;
alt = NULL;
}
}
}
/* if there was an overflow while generating the code, make sure
S is still correct */
if (is_lu) {
if (olabp)
cint->current_cl.lui = ClauseCodeToLogUpdIndex(*olabp);
else
cint->current_cl.lui = NULL;
} else {
if (olabp)
cint->current_cl.si = ClauseCodeToStaticIndex(*olabp);
else
cint->current_cl.si = NULL;
}
if (s_reg != NULL)
S = s_reg;
#ifdef TABLING
/* handle tabling hack that insertes a failcode,
this really corresponds to not having any more clauses */
if (alt == TRUSTFAILCODE)
alt = NULL;
#endif
if (alt == NULL) {
/* oops, we are at last clause */
fail_l = (UInt)FAILCODE;
clleft = 0;
last = ap->cs.p_code.LastClause;
} else {
if (ap->PredFlags & LogUpdatePredFlag) {
op_numbers op = Yap_op_from_opcode(alt->opc);
if (op == _trust_logical_pred) {
last = NEXTOP(alt,l)->u.ld.d;
} else if (op >= _retry2 && op <= _retry4) {
last = alt->u.l.l;
} else {
last = alt->u.ld.d;
}
} else {
op_numbers op = Yap_op_from_opcode(alt->opc);
if (op == _retry || op == _trust) {
last = alt->u.ld.d;
#ifdef TABLING
} else if (op == _table_retry || op == _table_trust) {
last = PREVOP(alt->u.ld.d,ld);
#endif /* TABLING */
} else if (op >= _retry2 && op <= _retry4) {
last = alt->u.l.l;
}
}
fail_l = (UInt)alt;
clleft = count_clauses_left(last,ap);
}
if (Yap_op_from_opcode((*labp)->opc) == _expand_clauses) {
/* ok, we know how many clauses */
yamop *ipc = *labp;
/* check all slots, not just the ones with values */
COUNT nclauses = ipc->u.sp.s1;
yamop **clp = (yamop **)NEXTOP(ipc,sp);
eblk = cint->expand_block = ipc;
if (cls+2*nclauses > (ClauseDef *)(ASP-4096)) {
/* tell how much space we need (worst case) */
Yap_Error_Size += 2*NClauses*sizeof(ClauseDef);
/* grow stack */
save_machine_regs();
longjmp(cint->CompilerBotch,3);
}
if (ap->PredFlags & LogUpdatePredFlag) {
max = install_log_upd_clauseseq(cls, ap, stack, clp, clp+nclauses);
} else {
max = install_clauseseq(cls, ap, stack, clp, clp+nclauses);
}
} else {
cint->expand_block = NULL;
if (cls+2*NClauses > (ClauseDef *)(ASP-4096)) {
/* tell how much space we need (worst case) */
Yap_Error_Size += 2*NClauses*sizeof(ClauseDef);
save_machine_regs();
longjmp(cint->CompilerBotch,3);
}
if (ap->PredFlags & LogUpdatePredFlag) {
max = install_log_upd_clauses(cls, ap, stack, first, last);
} else {
max = install_clauses(cls, ap, stack, first, last);
}
#if DEBUG_EXPAND
if (ap->PredFlags & LogUpdatePredFlag) {
fprintf(stderr,"vsc +");
} else {
fprintf(stderr,"vsc ");
}
fprintf(stderr," : expanding %d out of %d\n", (max-cls)+1,NClauses);
#endif
}
/* don't count last clause if you don't have to */
if (alt && max->Code == last) max--;
if (max < cls && labp != NULL) {
*labp = FAILCODE;
return labp;
}
cint->freep = (char *)(max+1);
cint->CodeStart = cint->BlobsStart = cint->cpc = cint->icpc = NULL;
if (!IsVarTerm(sp[-1].val) && sp > stack) {
if (IsAtomOrIntTerm(sp[-1].val)) {
if (s_reg == NULL) { /* we have not yet looked into terms */
lab = do_index(cls, max, cint, argno+1, fail_l, isfirstcl, clleft, top);
} else {
UInt arity = 0;
if (ap->PredFlags & LogUpdatePredFlag) {
reinstall_log_upd_clauses(cls, max, ap, stack);
} else {
reinstall_clauses(cls, max, ap, stack);
}
sp--;
while (sp > stack) {
Term t = sp[-1].val;
if (IsApplTerm(t)) {
Functor f = (Functor)RepAppl(t);
if (!IsExtensionFunctor(f)) {
arity = ArityOfFunctor(f);
break;
} else {
sp--;
}
} else if (IsPairTerm(t)) {
arity = 2;
break;
} else {
sp--;
}
}
lab = do_compound_index(cls, max, s_reg, cint, i, arity, argno, fail_l, isfirstcl, is_last_arg, clleft, top, FALSE);
}
} else if (IsPairTerm(sp[-1].val) && sp > stack) {
lab = do_compound_index(cls, max, s_reg, cint, i, 2, argno, fail_l, isfirstcl, is_last_arg, clleft, top, FALSE);
} else {
Functor f = (Functor)RepAppl(sp[-1].val);
/* we are continuing within a compound term */
if (IsExtensionFunctor(f)) {
lab = do_index(cls, max, cint, argno+1, fail_l, isfirstcl, clleft, top);
} else {
lab = do_compound_index(cls, max, s_reg, cint, i, ArityOfFunctor(f), argno, fail_l, isfirstcl, is_last_arg, clleft, top, FALSE);
}
}
} else {
if (argno == ap->ArityOfPE) {
lab =
do_var_clauses(cls, max, FALSE, cint, isfirstcl, clleft, fail_l, ap->ArityOfPE+1);
} else {
lab = do_index(cls, max, cint, argno+1, fail_l, isfirstcl, clleft, top);
}
}
if (labp && !(lab & 1))
*labp = (yamop *)lab; /* in case we have a single clause */
return labp;
}
static yamop *
ExpandIndex(PredEntry *ap, int ExtraArgs) {
yamop *indx_out, *expand_clauses;
yamop **labp;
int cb;
struct intermediates cint;
if ((cb = setjmp(cint.CompilerBotch)) == 3) {
restore_machine_regs();
/* grow stack */
recover_from_failed_susp_on_cls(&cint, 0);
Yap_gcl(Yap_Error_Size, ap->ArityOfPE+ExtraArgs, ENV, CP);
} else if (cb == 2) {
restore_machine_regs();
Yap_Error_Size = recover_from_failed_susp_on_cls(&cint, Yap_Error_Size);
if (!Yap_growheap(FALSE, Yap_Error_Size, NULL)) {
save_machine_regs();
if (ap->PredFlags & LogUpdatePredFlag) {
Yap_kill_iblock((ClauseUnion *)ClauseCodeToLogUpdIndex(ap->cs.p_code.TrueCodeOfPred),NULL, ap);
} else {
StaticIndex *cl;
cl = ClauseCodeToStaticIndex(ap->cs.p_code.TrueCodeOfPred);
Yap_kill_iblock((ClauseUnion *)ClauseCodeToStaticIndex(ap->cs.p_code.TrueCodeOfPred),NULL, ap);
}
ap->OpcodeOfPred = INDEX_OPCODE;
ap->CodeOfPred = ap->cs.p_code.TrueCodeOfPred = (yamop *)(&(ap->OpcodeOfPred));
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, Yap_ErrorMessage);
return FAILCODE;
}
} else if (cb == 4) {
restore_machine_regs();
if (!Yap_growtrail(Yap_Error_Size, FALSE)) {
save_machine_regs();
if (ap->PredFlags & LogUpdatePredFlag) {
Yap_kill_iblock((ClauseUnion *)ClauseCodeToLogUpdIndex(ap->cs.p_code.TrueCodeOfPred),NULL, ap);
} else {
StaticIndex *cl;
cl = ClauseCodeToStaticIndex(ap->cs.p_code.TrueCodeOfPred);
Yap_kill_iblock((ClauseUnion *)cl, NULL, ap);
}
return FAILCODE;
}
}
restart_index:
cint.CodeStart = cint.cpc = cint.BlobsStart = cint.icpc = NIL;
cint.CurrentPred = ap;
Yap_ErrorMessage = NULL;
Yap_Error_Size = 0;
if (P->opc == Yap_opcode(_expand_clauses)) {
expand_clauses = P;
} else {
expand_clauses = NULL;
}
#ifdef DEBUG
if (Yap_Option['i' - 'a' + 1]) {
Term tmod = ap->ModuleOfPred;
if (!tmod) tmod = TermProlog;
Yap_DebugPutc(Yap_c_error_stream,'>');
Yap_DebugPutc(Yap_c_error_stream,'\t');
Yap_plwrite(tmod, Yap_DebugPutc, 0);
Yap_DebugPutc(Yap_c_error_stream,':');
if (ap->ModuleOfPred == IDB_MODULE) {
Term t = Deref(ARG1);
if (IsAtomTerm(t)) {
Yap_plwrite(t, Yap_DebugPutc, 0);
} else if (IsIntegerTerm(t)) {
Yap_plwrite(t, Yap_DebugPutc, 0);
} else {
Functor f = FunctorOfTerm(t);
Atom At = NameOfFunctor(f);
Yap_plwrite(MkAtomTerm(At), Yap_DebugPutc, 0);
Yap_DebugPutc(Yap_c_error_stream,'/');
Yap_plwrite(MkIntTerm(ArityOfFunctor(f)), Yap_DebugPutc, 0);
}
} else {
if (ap->ArityOfPE == 0) {
Atom At = (Atom)ap->FunctorOfPred;
Yap_plwrite(MkAtomTerm(At), Yap_DebugPutc, 0);
} else {
Functor f = ap->FunctorOfPred;
Atom At = NameOfFunctor(f);
Yap_plwrite(MkAtomTerm(At), Yap_DebugPutc, 0);
Yap_DebugPutc(Yap_c_error_stream,'/');
Yap_plwrite(MkIntTerm(ArityOfFunctor(f)), Yap_DebugPutc, 0);
}
}
Yap_DebugPutc(Yap_c_error_stream,'\n');
}
#endif
if ((labp = expand_index(&cint)) == NULL) {
return FAILCODE;
}
if (*labp == FAILCODE) {
return FAILCODE;
}
#ifdef DEBUG
if (Yap_Option['i' - 'a' + 1]) {
Yap_ShowCode(&cint);
}
#endif
/* globals for assembler */
IPredArity = ap->ArityOfPE;
if (cint.CodeStart) {
if ((indx_out = Yap_assemble(ASSEMBLING_EINDEX, TermNil, ap, FALSE, &cint)) == NULL) {
if (!Yap_growheap(FALSE, Yap_Error_Size, NULL)) {
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, Yap_ErrorMessage);
return FAILCODE;
}
goto restart_index;
}
} else {
/* single case */
return *labp;
}
if (indx_out == NULL) {
return FAILCODE;
}
*labp = indx_out;
if (ap->PredFlags & LogUpdatePredFlag) {
/* add to head of current code children */
LogUpdIndex *ic = cint.current_cl.lui,
*nic = ClauseCodeToLogUpdIndex(indx_out);
if (ic == NULL)
ic = (LogUpdIndex *)Yap_find_owner_index((yamop *)labp, ap);
/* insert myself in the indexing code chain */
nic->SiblingIndex = ic->ChildIndex;
nic->PrevSiblingIndex = NULL;
if (ic->ChildIndex) {
ic->ChildIndex->PrevSiblingIndex = nic;
}
nic->ParentIndex = ic;
nic->ClFlags &= ~SwitchRootMask;
ic->ChildIndex = nic;
ic->ClRefCount++;
} else {
/* add to head of current code children */
StaticIndex *ic = cint.current_cl.si,
*nic = ClauseCodeToStaticIndex(indx_out);
if (ic == NULL)
ic = (StaticIndex *)Yap_find_owner_index((yamop *)labp, ap);
/* insert myself in the indexing code chain */
nic->SiblingIndex = ic->ChildIndex;
ic->ChildIndex = nic;
}
if (expand_clauses) {
P = indx_out;
recover_ecls_block(expand_clauses);
}
return indx_out;
}
yamop *
Yap_ExpandIndex(PredEntry *ap, UInt nargs) {
return ExpandIndex(ap, nargs);
}
static path_stack_entry *
push_path(path_stack_entry *sp, yamop **pipc, ClauseDef *clp, struct intermediates *cint)
{
if (sp+1 > (path_stack_entry *)Yap_TrailTop) {
save_machine_regs();
longjmp(cint->CompilerBotch,4);
}
sp->flag = pc_entry;
sp->u.pce.pi_pc = pipc;
sp->u.pce.code = clp->Code;
sp->u.pce.current_code = clp->CurrentCode;
sp->u.pce.work_pc = clp->u.WorkPC;
sp->u.pce.tag = clp->Tag;
return sp+1;
}
static path_stack_entry *
fetch_new_block(path_stack_entry *sp, yamop **pipc, PredEntry *ap)
{
/* add current position */
sp->flag = block_entry;
sp->u.cle.entry_code = pipc;
if (ap->PredFlags & LogUpdatePredFlag) {
sp->u.cle.block = (ClauseUnion *)ClauseCodeToLogUpdIndex(*pipc);
} else {
sp->u.cle.block = (ClauseUnion *)ClauseCodeToStaticIndex(*pipc);
}
return sp+1;
}
static path_stack_entry *
init_block_stack(path_stack_entry *sp, yamop *ipc, PredEntry *ap)
{
/* add current position */
sp->flag = block_entry;
sp->u.cle.entry_code = NULL;
if (ap->PredFlags & LogUpdatePredFlag) {
sp->u.cle.block = (ClauseUnion *)ClauseCodeToLogUpdIndex(ipc);
} else {
sp->u.cle.block = (ClauseUnion *)ClauseCodeToStaticIndex(ipc);
}
return sp+1;
}
static path_stack_entry *
cross_block(path_stack_entry *sp, yamop **pipc, PredEntry *ap)
{
yamop *ipc = *pipc;
path_stack_entry *tsp = sp;
ClauseUnion *block;
do {
UInt bsize;
while ((--tsp)->flag != block_entry);
block = tsp->u.cle.block;
if (block->lui.ClFlags & LogUpdMask)
bsize = block->lui.ClSize;
else
bsize = block->si.ClSize;
if (ipc > (yamop *)block &&
ipc <= (yamop *)((CODEADDR)block + bsize)) {
path_stack_entry *nsp = tsp+1;
for (;tsp<sp;tsp++) {
if (tsp->flag == pc_entry) {
if (nsp != tsp) {
nsp->flag = pc_entry;
nsp->u.pce.pi_pc = tsp->u.pce.pi_pc;
nsp->u.pce.code = tsp->u.pce.code;
nsp->u.pce.current_code = tsp->u.pce.current_code;
nsp->u.pce.work_pc = tsp->u.pce.work_pc;
nsp->u.pce.tag = tsp->u.pce.tag;
}
nsp++;
}
}
return nsp;
}
} while (tsp->u.cle.entry_code != NULL);
/* moved to a new block */
return fetch_new_block(sp, pipc, ap);
}
static yamop *
pop_path(path_stack_entry **spp, ClauseDef *clp, PredEntry *ap)
{
path_stack_entry *sp = *spp;
yamop *nipc;
while ((--sp)->flag != pc_entry);
*spp = sp;
clp->Code = sp->u.pce.code;
clp->CurrentCode = sp->u.pce.current_code;
clp->u.WorkPC = sp->u.pce.work_pc;
clp->Tag = sp->u.pce.tag;
if (sp->u.pce.pi_pc == NULL) {
*spp = sp;
return NULL;
}
nipc = *(sp->u.pce.pi_pc);
*spp = cross_block(sp, sp->u.pce.pi_pc, ap);
return nipc;
}
static int
table_fe_overflow(yamop *pc, Functor f)
{
if (pc->u.sssl.s <= MIN_HASH_ENTRIES) {
/* we cannot expand otherwise */
COUNT i;
FuncSwiEntry *csw = (FuncSwiEntry *)pc->u.sssl.l;
for (i=0; i < pc->u.sssl.s; i++,csw++) {
if (csw->Tag == f) return FALSE;
}
return TRUE;
} else {
COUNT free = pc->u.sssl.s-pc->u.sssl.e;
return (!free || pc->u.sssl.s/free > 4);
}
}
static int
table_ae_overflow(yamop *pc, Term at)
{
if (pc->u.sssl.s <= MIN_HASH_ENTRIES) {
/* check if we are already there */
COUNT i;
AtomSwiEntry *csw = (AtomSwiEntry *)pc->u.sssl.l;
for (i=0; i < pc->u.sssl.s; i++,csw++) {
if (csw->Tag == at) return FALSE;
}
return TRUE;
} else {
COUNT free = pc->u.sssl.s-pc->u.sssl.e;
return (!free || pc->u.sssl.s/free > 4);
}
}
static void
replace_index_block(ClauseUnion *parent_block, yamop *cod, yamop *ncod, PredEntry *ap)
{
if (ap->PredFlags & LogUpdatePredFlag) {
LogUpdIndex
*cl = ClauseCodeToLogUpdIndex(cod),
*ncl = ClauseCodeToLogUpdIndex(ncod),
*c = parent_block->lui.ChildIndex;
ncl->SiblingIndex = cl->SiblingIndex;
ncl->PrevSiblingIndex = cl->PrevSiblingIndex;
ncl->ClRefCount = cl->ClRefCount;
ncl->ChildIndex = cl->ChildIndex;
ncl->ParentIndex = cl->ParentIndex;
ncl->ClPred = cl->ClPred;
INIT_LOCK(ncl->ClLock);
if (c == cl) {
parent_block->lui.ChildIndex = ncl;
} else {
cl->PrevSiblingIndex->SiblingIndex = ncl;
}
if (cl->SiblingIndex) {
cl->SiblingIndex->PrevSiblingIndex = ncl;
}
c = cl->ChildIndex;
while (c != NULL) {
c->ParentIndex = ncl;
c = c->SiblingIndex;
}
Yap_InformOfRemoval((CODEADDR)cl);
Yap_FreeCodeSpace((char *)cl);
} else {
StaticIndex
*cl = ClauseCodeToStaticIndex(cod),
*ncl = ClauseCodeToStaticIndex(ncod),
*c = parent_block->si.ChildIndex;
ncl->SiblingIndex = cl->SiblingIndex;
ncl->ClPred = cl->ClPred;
if (c == cl) {
parent_block->si.ChildIndex = ncl;
} else {
while (c->SiblingIndex != cl) {
c = c->SiblingIndex;
}
c->SiblingIndex = ncl;
}
Yap_InformOfRemoval((CODEADDR)cl);
Yap_FreeCodeSpace((char *)cl);
}
}
static AtomSwiEntry *
expand_ctable(yamop *pc, ClauseUnion *blk, struct intermediates *cint, Term at)
{
PredEntry *ap = cint->CurrentPred;
int n = pc->u.sssl.s, i, i0 = n;
UInt fail_l = Zero;
AtomSwiEntry *old_ae = (AtomSwiEntry *)(pc->u.sssl.l), *target;
if (n > MIN_HASH_ENTRIES) {
AtomSwiEntry *tmp = old_ae;
int i;
n = 1;
for (i = 0; i < pc->u.sssl.s; i++,tmp++) {
if (tmp->Tag != Zero) n++;
else fail_l = tmp->Label;
}
} else {
fail_l = old_ae[n].Label;
n++;
}
if (n > MIN_HASH_ENTRIES) {
int cases = MIN_HASH_ENTRIES, i, n0;
n0 = n+1+n/4;
while (cases < n0) cases *= 2;
if (cases == pc->u.sssl.s) {
return fetch_centry(old_ae, at, n-1, n);
}
/* initialise */
target = (AtomSwiEntry *)emit_switch_space(cases, sizeof(AtomSwiEntry), cint);
pc->opc = Yap_opcode(_switch_on_cons);
pc->u.sssl.s = cases;
for (i=0; i<cases; i++) {
target[i].Tag = Zero;
target[i].Label = fail_l;
}
} else {
pc->opc = Yap_opcode(_if_cons);
pc->u.sssl.s = n;
target = (AtomSwiEntry *)emit_switch_space(n+1, sizeof(AtomSwiEntry), cint);
target[n].Tag = Zero;
target[n].Label = fail_l;
}
for (i = 0; i < i0; i++,old_ae++) {
Term tag = old_ae->Tag;
if (tag != Zero) {
AtomSwiEntry *ics = fetch_centry(target, tag, i, n);
ics->Tag = tag;
ics->Label = old_ae->Label;
}
}
/* support for threads */
if (blk)
replace_index_block(blk, pc->u.sssl.l, (yamop *)target, ap);
pc->u.sssl.l = (yamop *)target;
return fetch_centry(target, at, n-1, n);
}
static FuncSwiEntry *
expand_ftable(yamop *pc, ClauseUnion *blk, struct intermediates *cint, Functor f)
{
PredEntry *ap = cint->CurrentPred;
int n = pc->u.sssl.s, i, i0 = n;
UInt fail_l = Zero;
FuncSwiEntry *old_fe = (FuncSwiEntry *)(pc->u.sssl.l), *target;
if (n > MIN_HASH_ENTRIES) {
FuncSwiEntry *tmp = old_fe;
int i;
n = 1;
for (i = 0; i < pc->u.sssl.s; i++,tmp++) {
if (tmp->Tag != Zero) n++;
else fail_l = tmp->Label;
}
} else {
fail_l = old_fe[n].Label;
n++;
}
if (n > MIN_HASH_ENTRIES) {
int cases = MIN_HASH_ENTRIES, i, n0;
n0 = n+1+n/4;
while (cases < n0) cases *= 2;
if (cases == pc->u.sssl.s) {
return fetch_fentry(old_fe, f, n-1, n);
}
pc->opc = Yap_opcode(_switch_on_func);
pc->u.sssl.s = cases;
pc->u.sssl.e = n;
pc->u.sssl.w = 0;
/* initialise */
target = (FuncSwiEntry *)emit_switch_space(cases, sizeof(FuncSwiEntry), cint);
for (i=0; i<cases; i++) {
target[i].Tag = NULL;
target[i].Label = fail_l;
}
} else {
pc->opc = Yap_opcode(_if_func);
pc->u.sssl.s = n;
pc->u.sssl.e = n;
pc->u.sssl.w = 0;
target = (FuncSwiEntry *)emit_switch_space(n+1, sizeof(FuncSwiEntry), cint);
target[n].Tag = Zero;
target[n].Label = fail_l;
}
for (i = 0; i < i0; i++,old_fe++) {
Functor f = old_fe->Tag;
if (f != NULL) {
FuncSwiEntry *ifs = fetch_fentry(target, f, i, n);
ifs->Tag = old_fe->Tag;
ifs->Label = old_fe->Label;
}
}
replace_index_block(blk, pc->u.sssl.l, (yamop *)target, ap);
pc->u.sssl.l = (yamop *)target;
return fetch_fentry(target, f, n-1, n);
}
static ClauseUnion *
current_block(path_stack_entry *sp)
{
while ((--sp)->flag != block_entry);
return sp->u.cle.block;
}
static path_stack_entry *
kill_block(path_stack_entry *sp, PredEntry *ap)
{
while ((--sp)->flag != block_entry);
if (sp->u.cle.entry_code == NULL) {
Yap_kill_iblock(sp->u.cle.block, NULL, ap);
} else {
path_stack_entry *nsp = sp;
while ((--nsp)->flag != block_entry);
Yap_kill_iblock(sp->u.cle.block, nsp->u.cle.block, ap);
*sp->u.cle.entry_code = (yamop *)&(ap->cs.p_code.ExpandCode);
}
return sp;
}
static path_stack_entry *
kill_clause(yamop *ipc, yamop *bg, yamop *lt, path_stack_entry *sp0, PredEntry *ap)
{
LogUpdIndex *blk;
yamop *start;
op_numbers op0;
path_stack_entry *sp = sp0;
while ((--sp)->flag != block_entry);
blk = (LogUpdIndex *)(sp->u.cle.block);
start = blk->ClCode;
op0 = Yap_op_from_opcode(start->opc);
while (op0 == _jump_if_nonvar) {
start = NEXTOP(start, xll);
op0 = Yap_op_from_opcode(start->opc);
}
if ((op0 != _enter_lu_pred && op0 != _stale_lu_index)
|| !start->u.Ill.s /* weird block */) {
return kill_block(sp+1, ap);
} else {
/* decrease number of clauses */
start->u.Ill.s--;
if (start->u.Ill.s == 1) {
yamop *codep = start->u.Ill.l1;
/* search for the one clause that has been left */
while (TRUE) {
op_numbers op = Yap_op_from_opcode(codep->opc);
switch (op) {
case _trust:
case _retry:
case _try_clause:
/* kill block and replace by this single clause */
if (codep->u.ld.d != FAILCODE) {
path_stack_entry *nsp;
LogUpdClause *tgl = ClauseCodeToLogUpdClause(codep->u.ld.d);
if (tgl->ClFlags & ErasedMask ||
IN_BETWEEN(bg, codep->u.ld.d, lt)) {
codep = NEXTOP(codep,ld);
break;
}
nsp = sp;
while ((--nsp)->flag != block_entry);
*sp->u.cle.entry_code = codep->u.ld.d;
Yap_kill_iblock(sp->u.cle.block, nsp->u.cle.block, ap);
return sp;
} else {
codep = NEXTOP(codep,ld);
}
break;
case _retry2:
case _retry3:
case _retry4:
case _try_clause2:
case _try_clause3:
case _try_clause4:
/* kill block and replace by this single clause */
if (codep->u.l.l != FAILCODE) {
path_stack_entry *nsp;
LogUpdClause *tgl = ClauseCodeToLogUpdClause(codep->u.l.l);
if (tgl->ClFlags & ErasedMask ||
IN_BETWEEN(bg, codep->u.l.l, lt)) {
codep = NEXTOP(codep,l);
break;
}
nsp = sp;
while ((--nsp)->flag != block_entry);
*sp->u.cle.entry_code = codep->u.l.l;
Yap_kill_iblock(sp->u.cle.block, nsp->u.cle.block, ap);
return sp;
} else {
codep = NEXTOP(codep,l);
}
break;
case _trust_logical_pred:
codep = NEXTOP(codep, l);
break;
case _retry_profiled:
case _count_call:
codep = NEXTOP(codep, p);
break;
default:
Yap_Error(INTERNAL_ERROR, TermNil, "Invalid Opcode %d", op);
return sp;
}
}
}
/* just mark the clause as dead and the code as unreachable, but
don't do anything else
*/
if (ap->ArityOfPE >= 2 &&
ap->ArityOfPE <=4) {
if (IN_BETWEEN(bg, start->u.Ill.l1->u.l.l, lt)) {
start->u.Ill.l1->u.l.l = FAILCODE;
}
} else {
if (IN_BETWEEN(bg, start->u.Ill.l1->u.ld.d, lt)) {
start->u.Ill.l1->u.ld.d = FAILCODE;
}
}
start->opc = Yap_opcode(_stale_lu_index);
return sp0;
}
}
static yamop *
copy_ld(yamop *codep, yamop *ocodep, PredEntry *ap, yamop *code, int has_cut)
{
codep->u.ld.s = ap->ArityOfPE;
codep->u.ld.p = ap;
codep->u.ld.d = code;
#ifdef YAPOR
/* FIX ME */
codep->u.ld.or_arg = ocodep->u.ld.or_arg;
#endif /* YAPOR */
#ifdef TABLING
codep->u.ld.te = ocodep->u.ld.te;
#endif /* TABLING */
return NEXTOP(codep, ld);
}
static yamop *
gen_lui_retry(yamop *codep, yamop *ocodep, int profiled, int count_call, yamop *cl, PredEntry *ap)
{
if (profiled) {
codep->opc = Yap_opcode(_retry_profiled);
codep->u.p.p = ap;
codep = NEXTOP(codep,p);
}
if (count_call) {
codep->opc = Yap_opcode(_count_retry);
codep->u.p.p = ap;
codep = NEXTOP(codep,p);
}
if (ap->ArityOfPE >= 2 &&
ap->ArityOfPE <= 4) {
codep->opc = Yap_opcode(_retry2+(ap->ArityOfPE-2));
codep->u.l.l = cl;
return NEXTOP(codep, l);
} else {
codep->opc = Yap_opcode(_retry);
return copy_ld(codep, ocodep, ap, cl, FALSE);
}
}
static yamop *
gen_lui_trust(yamop *codep, yamop *ocodep, int profiled, int count_call, PredEntry *ap, yamop *code, int has_cut, LogUpdIndex *blk)
{
if (profiled) {
codep->opc = Yap_opcode(_retry_profiled);
codep->u.p.p = ap;
codep = NEXTOP(codep,p);
}
if (count_call) {
codep->opc = Yap_opcode(_count_call);
codep->u.p.p = ap;
codep = NEXTOP(codep,p);
}
codep->opc = Yap_opcode(_trust_logical_pred);
codep->u.l.l = (yamop *)blk;
codep = NEXTOP(codep,l);
codep->opc = Yap_opcode(_trust);
return copy_ld(codep, ocodep, ap, code, has_cut);
}
static void
clean_ref_to_clause(LogUpdClause *tgl, op_numbers op, int compact_mode)
{
if (op == _try_clause ||
op == _try_clause2||
op == _try_clause3||
op == _try_clause4||
!compact_mode)
return;
LOCK(tgl->ClLock);
tgl->ClRefCount--;
if ((tgl->ClFlags & ErasedMask) &&
!(tgl->ClRefCount) &&
!(tgl->ClFlags & InUseMask)) {
/* last ref to the clause */
UNLOCK(tgl->ClLock);
Yap_ErLogUpdCl(tgl);
} else {
UNLOCK(tgl->ClLock);
}
}
static yamop *
cp_lu_trychain(yamop *codep, yamop *ocodep, yamop *ostart, int flag, PredEntry *ap, yamop *code, int has_cut, LogUpdIndex *nblk, UInt ncls, UInt i)
{
int count_reds = ap->PredFlags & CountPredFlag;
int profiled = ap->PredFlags & ProfiledPredFlag;
int compact_mode = (codep == ocodep);
while (ocodep != NULL &&
ocodep < ostart->u.Ill.l2) {
op_numbers op = Yap_op_from_opcode(ocodep->opc);
switch (op) {
case _try_clause2:
case _try_clause3:
case _try_clause4:
if (ocodep->u.l.l == FAILCODE) {
ocodep = NEXTOP(ocodep, l);
break;
}
case _retry2:
case _retry3:
case _retry4:
{
/* set up a try_clause2 */
LogUpdClause *tgl = ClauseCodeToLogUpdClause(ocodep->u.l.l);
if (tgl->ClFlags & ErasedMask) {
clean_ref_to_clause(tgl, op, compact_mode);
ocodep = NEXTOP(ocodep, l);
break;
} else if (i == 0) {
if (compact_mode &&
op != _try_clause2 +(ap->ArityOfPE-2)) {
tgl->ClRefCount--;
}
codep->opc = Yap_opcode(_try_clause2+(ap->ArityOfPE-2));
codep->u.l.l = ocodep->u.l.l;
codep = NEXTOP(codep,l);
} else if (i == ncls-1) {
if (!compact_mode) {
tgl->ClRefCount++;
} else {
Yap_cleanup_dangling_indices(NEXTOP(ocodep,l),ostart->u.Ill.l1,ostart->u.Ill.l2,(yamop *)&(ap->cs.p_code.ExpandCode));
}
codep = gen_lui_trust(codep, ocodep, profiled, count_reds, ap, ocodep->u.l.l, TRUE, nblk);
ocodep = NULL;
break;
} else {
if (op == _try_clause2+(ap->ArityOfPE-2) || !compact_mode) {
tgl->ClRefCount++;
}
codep = gen_lui_retry(codep, ocodep, profiled, count_reds, ocodep->u.l.l, ap);
}
}
i++;
ocodep = NEXTOP(ocodep, l);
break;
case _try_clause:
if (ocodep->u.ld.d == FAILCODE) {
ocodep = NEXTOP(ocodep, ld);
break;
}
case _retry:
case _trust:
{
/* set up a try_clause */
LogUpdClause *tgl = ClauseCodeToLogUpdClause(ocodep->u.ld.d);
if (tgl->ClFlags & ErasedMask) {
clean_ref_to_clause(tgl, op, compact_mode);
ocodep = NEXTOP(ocodep, ld);
break;
} else if (i == 0) {
if (compact_mode &&
op != _try_clause) {
tgl->ClRefCount--;
}
if (ap->ArityOfPE >= 2 &&
ap->ArityOfPE <= 4) {
codep->opc = Yap_opcode(_try_clause2+(ap->ArityOfPE-2));
codep->u.l.l = ocodep->u.ld.d;
codep = NEXTOP(codep, l);
} else {
codep->opc = Yap_opcode(_try_clause);
codep = copy_ld(codep, ocodep, ap, ocodep->u.ld.d, FALSE);
}
} else if (i == ncls-1) {
if (!compact_mode) {
tgl->ClRefCount++;
} else {
Yap_cleanup_dangling_indices(NEXTOP(ocodep,ld),ostart->u.Ill.l1,ostart->u.Ill.l2,(yamop *)&(ap->cs.p_code.ExpandCode));
}
codep = gen_lui_trust(codep, ocodep, profiled, count_reds, ap, ocodep->u.ld.d, TRUE, nblk);
ocodep = NULL;
break;
} else {
if (op == _try_clause || !compact_mode) {
tgl->ClRefCount++;
}
codep = gen_lui_retry(codep, ocodep, profiled, count_reds, ocodep->u.ld.d, ap);
}
}
i++;
ocodep = NEXTOP(ocodep, ld);
break;
case _trust_logical_pred:
ocodep = NEXTOP(ocodep, l);
break;
case _retry_profiled:
case _count_call:
ocodep = NEXTOP(ocodep, p);
break;
default:
Yap_Error(INTERNAL_ERROR, TermNil, "Invalid Opcode");
}
}
if (flag == RECORDZ) {
codep = gen_lui_trust(codep, ocodep, profiled, count_reds, ap, code, has_cut, nblk);
}
codep->opc = Yap_opcode(_Ystop);
/* this must be updated if we are copying to different place */
codep->u.l.l = nblk->ClCode;
return codep;
}
static yamop *
replace_lu_block(LogUpdIndex *blk, int flag, PredEntry *ap, yamop *code, int has_cut)
{
yamop *begin = blk->ClCode, *codep, *start, *ocodep;
yamop *nbegin;
UInt ncls, xcls, jnvs = 0;
UInt sz, i;
LogUpdIndex *ncl, *pcl;
int count_reds = ap->PredFlags & CountPredFlag;
int profiled = ap->PredFlags & ProfiledPredFlag;
op_numbers op = Yap_op_from_opcode(begin->opc);
while (op == _jump_if_nonvar) {
jnvs++;
begin = NEXTOP(begin, xll);
op = Yap_op_from_opcode(begin->opc);
}
/* add half the current space plus 1, and also the extra clause */
if (flag == RECORDA || flag == RECORDZ) {
/* we are still introducing a clause */
ncls = ++(begin->u.Ill.s);
xcls = ncls+ncls/2+2;
} else {
ncls = begin->u.Ill.s;
xcls = ncls;
}
if (ap->ArityOfPE == 2) {
sz = sizeof(LogUpdIndex)+
(xcls-1)*((UInt)NEXTOP((yamop *)NULL,l))+
((UInt)NEXTOP((yamop *)NULL,ld))+
jnvs*((UInt)NEXTOP((yamop *)NULL,xll))+
(UInt)NEXTOP((yamop *)NULL,Ill)+
(UInt)NEXTOP((yamop *)NULL,p)+
(UInt)NEXTOP((yamop *)NULL,l);
} else {
sz = sizeof(LogUpdIndex)+
xcls*((UInt)NEXTOP((yamop *)NULL,ld))+
jnvs*((UInt)NEXTOP((yamop *)NULL,xll))+
(UInt)NEXTOP((yamop *)NULL,Ill)+
(UInt)NEXTOP((yamop *)NULL,p)+
(UInt)NEXTOP((yamop *)NULL,l);
}
if (count_reds) sz += xcls*((UInt)NEXTOP((yamop *)NULL,p));
if (profiled) sz += xcls*((UInt)NEXTOP((yamop *)NULL,p));
ncl = (LogUpdIndex *)Yap_AllocCodeSpace(sz);
if (ncl == NULL) {
Yap_Error_Size = sz;
Yap_ErrorMessage = "while at indexing code";
return NULL;
}
#ifdef LOW_PROF
if (ProfilerOn &&
Yap_OffLineProfiler) {
Yap_inform_profiler_of_clause(ncl->ClCode, (yamop *)(ncl+sz), ap, 1);
}
#endif /* LOW_PROF */
ncl->ClFlags = LogUpdMask|IndexedPredFlag|IndexMask;
if (blk->ClFlags & SwitchRootMask) {
ncl->ClFlags |= SwitchRootMask;
}
ncl->ClPred = blk->ClPred;
ncl->ParentIndex = blk->ParentIndex;
ncl->ClRefCount = 0;
{
LogUpdIndex *idx = ncl->ChildIndex = blk->ChildIndex;
while (idx) {
LogUpdIndex *nidx;
LOCK(idx->ClLock);
blk->ClRefCount--;
ncl->ClRefCount++;
idx->ParentIndex = ncl;
nidx = idx->SiblingIndex;
UNLOCK(idx->ClLock);
idx = nidx;
}
}
blk->ChildIndex = NULL;
ncl->ClSize = sz;
INIT_LOCK(ncl->ClLock);
nbegin = ncl->ClCode;
begin = blk->ClCode;
while (jnvs--) {
nbegin->opc = begin->opc;
nbegin->u.xll.x = begin->u.xll.x;
nbegin->u.xll.l1 = begin->u.xll.l1;
nbegin->u.xll.l2 = NEXTOP(nbegin,xll);
if (nbegin->u.xll.l1->opc == Yap_opcode(_expand_clauses)) {
if (!(blk->ClFlags & ErasedMask)) {
/* we haven't done erase yet */
nbegin->u.xll.l1->u.sp.s3++;
}
}
begin = NEXTOP(begin, xll);
nbegin = NEXTOP(nbegin, xll);
}
codep = start = nbegin;
/* ok, we've allocated and set up things, now let's finish */
codep->opc = Yap_opcode(_enter_lu_pred);
codep->u.Ill.s = begin->u.Ill.s;
codep->u.Ill.I = ncl;
#if defined(YAPOR) || defined(THREADS)
codep->u.Ill.p = ap;
#endif
codep = NEXTOP(codep,Ill);
ocodep = begin->u.Ill.l1;
if (flag == RECORDA) {
int j;
for (j=0; j < ncls/2; j++) {
if (ap->ArityOfPE == 2) {
codep = NEXTOP(codep, l);
} else {
codep = NEXTOP(codep, ld);
}
if (profiled) codep = NEXTOP(codep, p);
if (count_reds) codep = NEXTOP(codep, p);
}
start->u.Ill.l1 = codep;
i = 1;
if (ap->ArityOfPE >= 2 &&
ap->ArityOfPE <= 4) {
codep->opc = Yap_opcode(_try_clause2+(ap->ArityOfPE-2));
codep->u.l.l = code;
codep = NEXTOP(codep,l);
} else {
codep->opc = Yap_opcode(_try_clause);
codep = copy_ld(codep, ocodep, ap, code, has_cut);
}
} else if (flag == RECORDZ) {
LogUpdClause *tgl = ClauseCodeToLogUpdClause(code);
tgl->ClRefCount++;
start->u.Ill.l1 = codep;
i = 0;
} else {
start->u.Ill.l1 = codep;
i = 0;
}
codep = cp_lu_trychain(codep, ocodep, begin, flag, ap, code, has_cut, ncl, ncls, i);
/* the copying has been done */
start->u.Ill.l2 = codep;
/* make sure we have access to the clause */
codep->u.l.l = start;
/* insert ourselves into chain */
if (blk->ClFlags & SwitchRootMask) {
Yap_kill_iblock((ClauseUnion *)blk, NULL, ap);
} else {
pcl = blk->ParentIndex;
ncl->SiblingIndex = pcl->ChildIndex;
ncl->ClPred = pcl->ClPred;
ncl->ParentIndex = pcl;
ncl->PrevSiblingIndex = NULL;
if (pcl->ChildIndex) {
pcl->ChildIndex->PrevSiblingIndex = ncl;
}
pcl->ChildIndex = ncl;
/* we have a new pointer to our clause */
pcl->ClRefCount++;
if (!(blk->ClFlags & ErasedMask)) {
Yap_kill_iblock((ClauseUnion *)blk, (ClauseUnion *)pcl, ap);
}
}
return ncl->ClCode;
}
static yamop *
clean_up_index(LogUpdIndex *blk, yamop **jlbl, PredEntry *ap)
{
yamop *codep = blk->ClCode;
if (
#if defined(THREADS) || defined(YAPOR)
blk->ClRefCount
#else
blk->ClFlags & InUseMask
#endif
) {
yamop *new;
if ((new = replace_lu_block(blk, REFRESH, ap, NULL, FALSE)) == NULL) {
/* will be null, if we are in the middle of the current block */
return NULL;
}
if (jlbl)
*jlbl = new;
return new;
} else {
/* work on the current block */
op_numbers op = Yap_op_from_opcode(codep->opc);
UInt ncls;
while (op == _jump_if_nonvar) {
codep = NEXTOP(codep, xll);
op = Yap_op_from_opcode(codep->opc);
}
ncls = codep->u.Ill.s;
codep->opc = Yap_opcode(_enter_lu_pred);
codep->u.Ill.l2 = cp_lu_trychain(codep->u.Ill.l1, codep->u.Ill.l1, codep, REFRESH, ap, NULL, FALSE, blk, ncls, 0);
return codep;
}
}
static int is_trust(OPCODE opc) {
return opc == Yap_opcode(_trust);
}
static yamop *
insertz_in_lu_block(LogUpdIndex *blk, PredEntry *ap, yamop *code)
{
op_numbers op = Yap_op_from_opcode(blk->ClCode->opc);
yamop *end, *last, *where, *next;
UInt bsize;
yamop *begin = blk->ClCode;
/* make sure this is something I can work with */
while (op == _jump_if_nonvar) {
begin = NEXTOP(begin, xll);
op = Yap_op_from_opcode(begin->opc);
}
/* block should start with an enter_lu_pred and end with a trust,
otherwise I just don't understand what is going on */
if ((op != _enter_lu_pred && op != _stale_lu_index) ||
! is_trust(PREVOP(begin->u.xll.l2,ld)->opc)) {
Yap_kill_iblock((ClauseUnion *)blk, (ClauseUnion *)blk->ParentIndex, ap);
return (yamop *)&(ap->cs.p_code.ExpandCode);
}
/* ok, we are in a sequence of try-retry-trust instructions, or something
similar */
bsize = blk->ClSize -(CELL)NEXTOP((yamop*)NULL,l);
end = (yamop *)((CODEADDR)blk+bsize);
where = last = begin->u.Ill.l2;
next = NEXTOP(where, ld);
if (ap->PredFlags & CountPredFlag) {
next = NEXTOP(where,p); /* trust logical followed by trust */
}
if (ap->PredFlags & ProfiledPredFlag) {
next = NEXTOP(where,p); /* trust logical followed by trust */
}
last = PREVOP(last, ld);
/* follow profiling and counting instructions */
if (ap->PredFlags & ProfiledPredFlag) {
next = NEXTOP(next, p);
}
if (ap->PredFlags & CountPredFlag) {
next = NEXTOP(next, p);
}
if (next <= end) {
/* we got space to put something in */
LogUpdClause *tgl = ClauseCodeToLogUpdClause(code);
if (begin->opc != Yap_opcode(_stale_lu_index)) {
if (
#if defined(THREADS) || defined(YAPOR)
blk->ClRefCount
#else
blk->ClFlags & InUseMask
#endif
) {
begin->opc = Yap_opcode(_stale_lu_index);
} else {
/* we need to rebuild the code */
/* first, shift the last retry down, getting rid of the trust logical pred */
yamop *nlast = PREVOP(last, l);
if (ap->ArityOfPE >= 2 &&
ap->ArityOfPE <= 4) {
yamop *cl = last->u.ld.d;
nlast->opc = Yap_opcode(_retry2+(ap->ArityOfPE-2));
nlast->u.l.l = cl;
where = NEXTOP(nlast,l);
} else {
memmove((void *)nlast, (void *)last, (CELL)NEXTOP((yamop *)NULL,ld));
nlast->opc = Yap_opcode(_retry);
where = NEXTOP(nlast,ld);
}
if (ap->PredFlags & ProfiledPredFlag) {
where->opc = Yap_opcode(_retry_profiled);
where->u.p.p = ap;
where = NEXTOP(where, p);
}
if (ap->PredFlags & CountPredFlag) {
where->opc = Yap_opcode(_count_retry);
where->u.p.p = ap;
where = NEXTOP(where, p);
}
where->opc = Yap_opcode(_trust_logical_pred);
where->u.l.l = (yamop *)blk;
where = NEXTOP(where, l);
}
}
where->opc = Yap_opcode(_trust);
where->u.ld.s = ap->ArityOfPE;
where->u.ld.p = ap;
where->u.ld.d = code;
#ifdef YAPOR
/* FIX ME */
where->u.ld.or_arg = last->u.ld.or_arg;
#endif /* YAPOR */
#ifdef TABLING
where->u.ld.te = last->u.ld.te;
#endif /* TABLING */
where = NEXTOP(where,ld);
begin->u.Ill.l2 = where;
where->opc = Yap_opcode(_Ystop);
where->u.l.l = blk->ClCode;
begin->u.Ill.s++;
tgl->ClRefCount++;
return blk->ClCode;
} else {
return replace_lu_block(blk, RECORDZ, ap, code, has_cut(code));
}
}
static yamop *
inserta_in_lu_block(LogUpdIndex *blk, PredEntry *ap, yamop *code)
{
op_numbers op = Yap_op_from_opcode(blk->ClCode->opc);
yamop *start, *next, *here;
yamop *begin = blk->ClCode;
/* make sure this is something I can work with */
while (op == _jump_if_nonvar) {
begin = NEXTOP(begin, xll);
op = Yap_op_from_opcode(begin->opc);
}
if ((op != _enter_lu_pred && op != _stale_lu_index) ||
! is_trust(PREVOP(begin->u.xll.l2,ld)->opc)) {
Yap_kill_iblock((ClauseUnion *)blk, (ClauseUnion *)blk->ParentIndex, ap);
return (yamop *)&(ap->cs.p_code.ExpandCode);
}
/* ok, we are in a sequence of try-retry-trust instructions, or something
similar */
here = next = begin->u.Ill.l1;
if (here->opc == Yap_opcode(_try_clause) && here->u.ld.d == FAILCODE) {
begin->u.Ill.s++;
here->u.ld.d = code;
return blk->ClCode;
}
if (here->opc == Yap_opcode(_try_clause2+(ap->ArityOfPE-2))
&& here->u.l.l == FAILCODE) {
begin->u.Ill.s++;
here->u.l.l = code;
return blk->ClCode;
}
start = NEXTOP(begin,Ill);
if (ap->ArityOfPE >= 2 &&
ap->ArityOfPE <= 4)
here = PREVOP(here, l);
else
here = PREVOP(here, ld);
/* follow profiling and counting instructions */
if (ap->PredFlags & ProfiledPredFlag) {
here = PREVOP(here, p);
}
if (ap->PredFlags & CountPredFlag) {
here = PREVOP(here, p);
}
if (here >= start) {
/* we got space to put something in */
if (ap->ArityOfPE >= 2 &&
ap->ArityOfPE <= 4) {
LogUpdClause *tgl = ClauseCodeToLogUpdClause(next->u.l.l);
next->opc = Yap_opcode(_retry2+(ap->ArityOfPE-2));
tgl->ClRefCount++;
begin->u.Ill.l1 = here;
begin->u.Ill.s++;
here->opc = Yap_opcode(_try_clause2+(ap->ArityOfPE-2));
here->u.l.l = code;
here = NEXTOP(here,l);
} else {
LogUpdClause *tgl = ClauseCodeToLogUpdClause(next->u.ld.d);
next->opc = Yap_opcode(_retry);
tgl->ClRefCount++;
begin->u.Ill.l1 = here;
begin->u.Ill.s++;
here->opc = Yap_opcode(_try_clause);
here->u.ld.s = next->u.ld.s;
here->u.ld.p = ap;
here->u.ld.d = code;
#ifdef YAPOR
/* FIX ME */
here->u.ld.or_arg = next->u.ld.or_arg;
#endif /* YAPOR */
#ifdef TABLING
here->u.ld.te = next->u.ld.te;
#endif /* TABLING */
here = NEXTOP(here,ld);
}
if (ap->PredFlags & ProfiledPredFlag) {
here->opc = Yap_opcode(_retry_profiled);
here->u.p.p = ap;
here = NEXTOP(here, p);
}
if (ap->PredFlags & CountPredFlag) {
here->opc = Yap_opcode(_count_retry);
here->u.p.p = ap;
here = NEXTOP(here, p);
}
return blk->ClCode;
} else {
return replace_lu_block(blk, RECORDA, ap, code, has_cut(code));
}
}
static path_stack_entry *
expanda_block(path_stack_entry *sp, PredEntry *ap, ClauseDef *cls, int group1, yamop *alt, struct intermediates *cint)
{
while ((--sp)->flag != block_entry);
if (sp->u.cle.entry_code == NULL) {
Yap_kill_iblock(sp->u.cle.block, NULL, ap);
} else if (ap->PredFlags & LogUpdatePredFlag &&
group1 && alt == NULL) {
yamop *new_code =
inserta_in_lu_block((LogUpdIndex *)sp->u.cle.block, ap, cls->Code);
if (new_code == NULL) {
recover_from_failed_susp_on_cls(cint, 0);
save_machine_regs();
longjmp(cint->CompilerBotch,2);
}
*sp->u.cle.entry_code = new_code;
} else {
path_stack_entry *nsp = sp;
while ((--nsp)->flag != block_entry);
Yap_kill_iblock(sp->u.cle.block, nsp->u.cle.block, ap);
*sp->u.cle.entry_code = (yamop *)&(ap->cs.p_code.ExpandCode);
}
return sp;
}
static path_stack_entry *
expandz_block(path_stack_entry *sp, PredEntry *ap, ClauseDef *cls, int group1, yamop *alt, struct intermediates *cint)
{
while ((--sp)->flag != block_entry);
if (sp->u.cle.entry_code == NULL) {
Yap_kill_iblock(sp->u.cle.block, NULL, ap);
} else if (ap->PredFlags & LogUpdatePredFlag &&
group1 && alt == NULL) {
yamop *new_code =
insertz_in_lu_block((LogUpdIndex *)sp->u.cle.block, ap, cls->Code);
if (new_code == NULL) {
recover_from_failed_susp_on_cls(cint, 0);
save_machine_regs();
longjmp(cint->CompilerBotch,2);
}
*sp->u.cle.entry_code =
new_code;
} else {
path_stack_entry *nsp = sp;
while ((--nsp)->flag != block_entry);
Yap_kill_iblock(sp->u.cle.block, nsp->u.cle.block, ap);
*sp->u.cle.entry_code = (yamop *)&(ap->cs.p_code.ExpandCode);
}
return sp;
}
static LogUpdClause *
lu_clause(yamop *ipc)
{
LogUpdClause *c;
CELL *p = (CELL *)ipc;
if (ipc == FAILCODE)
return NULL;
while ((c = ClauseCodeToLogUpdClause(p))->Id != FunctorDBRef ||
!(c->ClFlags & LogUpdMask) ||
(c->ClFlags & (IndexMask|DynamicMask|SwitchTableMask|SwitchRootMask))) {
p--;
}
return c;
}
static StaticClause *
static_clause(yamop *ipc, PredEntry *ap)
{
StaticClause *c;
CELL *p = (CELL *)ipc;
if (ipc == FAILCODE)
return NULL;
if (ap->PredFlags & MegaClausePredFlag)
return (StaticClause *)ipc;
while ((c = ClauseCodeToStaticClause(p))) {
UInt fls = c->ClFlags & ~HasBlobsMask;
if (fls == StaticMask) {
if (ap->PredFlags & SourcePredFlag) {
if ((char *)c->usc.ClSource < (char *)c+c->ClSize &&
valid_instructions(ipc, c->ClCode))
return c;
} else {
if (c->usc.ClPred == ap &&
valid_instructions(ipc, c->ClCode))
return c;
}
} else if (fls == (StaticMask|FactMask)) {
if (c->usc.ClPred == ap &&
valid_instructions(ipc,c->ClCode))
return c;
}
p--;
}
return NULL;
}
static StaticClause *
simple_static_clause(yamop *ipc)
{
if (ipc == FAILCODE)
return NULL;
return ClauseCodeToStaticClause(ipc);
}
/* this code should be called when we jumped to clauses */
static path_stack_entry *
kill_unsafe_block(path_stack_entry *sp, op_numbers op, PredEntry *ap, int first, int remove, ClauseDef *cls)
{
yamop *ipc;
while ((--sp)->flag != block_entry);
if (sp->u.cle.entry_code == NULL)
return sp;
ipc = *sp->u.cle.entry_code;
if (Yap_op_from_opcode(ipc->opc) == op) {
/* the new block was the current clause */
ClauseDef cld[2];
if (remove) {
*sp->u.cle.entry_code = FAILCODE;
return sp;
}
if (ap->PredFlags & LogUpdatePredFlag) {
struct intermediates intrs;
LogUpdClause *lc = lu_clause(ipc);
if (first) {
cld[0].Code = cls[0].Code;
cld[1].Code = lc->ClCode;
} else {
cld[0].Code = lc->ClCode;
cld[1].Code = cls[0].Code;
}
intrs.expand_block = NULL;
*sp->u.cle.entry_code = (yamop *)suspend_indexing(cld, cld+1, ap, &intrs);
} else {
/* static predicate, shouldn't do much, just suspend the code here */
*sp->u.cle.entry_code = (yamop *)&(ap->cs.p_code.ExpandCode);
return sp;
}
return sp;
}
/* we didn't have protection, should kill now */
return kill_block(sp+1, ap);
}
static int
compacta_expand_clauses(yamop *ipc)
{
/* expand clauses so that you have a hole at the beginning */
/* we know that there is at least one element here */
yamop **start = (yamop **)(NEXTOP(ipc,sp));
yamop **ptr, **end;
ptr = end = start+ipc->u.sp.s1;
while (ptr > start) {
yamop *next = *--ptr;
if (next) *--end = next;
}
if (ptr != end) {
while (end > start) {
*--end = NULL;
}
return TRUE;
}
return FALSE;
}
static int
compactz_expand_clauses(yamop *ipc)
{
/* expand clauses so that you have a hole at the beginning */
/* we know that there is at least one element here */
yamop **start = (yamop **)(NEXTOP(ipc,sp));
yamop **ptr, **end;
end = start+ipc->u.sp.s1;
ptr = start;
while (ptr < end) {
yamop *next = *ptr++;
if (next) *start++ = next;
}
/* reset empty slots at end */
if (start != end) {
while (start < end) {
*start++ = NULL;
}
return TRUE;
}
return FALSE;
}
/* this code should be called when we jumped to clauses */
static yamop *
add_to_expand_clauses(path_stack_entry **spp, yamop *ipc, ClauseDef *cls, PredEntry *ap, int first)
{
path_stack_entry *sp = *spp;
yamop **clar;
if (first) {
do {
clar = (yamop **)NEXTOP(ipc,sp);
if (*clar == NULL || clar[0] == cls->Code) {
while (*clar == NULL) clar++;
if (clar[0] != cls->Code) {
clar[-1] = cls->Code;
ipc->u.sp.s2++;
}
return pop_path(spp, cls, ap);
}
} while (compacta_expand_clauses(ipc));
} else {
do {
clar = (yamop **)NEXTOP(ipc,sp) + ipc->u.sp.s1;
if (clar[-1] == NULL || clar[-1] == cls->Code) {
while (*--clar == NULL);
if (clar[0] != cls->Code) {
clar[1] = cls->Code;
ipc->u.sp.s2++;
}
return pop_path(spp, cls, ap);
}
} while (compactz_expand_clauses(ipc));
}
while ((--sp)->flag != block_entry);
if (sp->u.cle.entry_code) {
*sp->u.cle.entry_code = (yamop *)&(ap->cs.p_code.ExpandCode);
}
recover_ecls_block(ipc);
return pop_path(spp, cls, ap);
}
/* this code should be called when we jumped to clauses */
static void
nullify_expand_clause(yamop *ipc, path_stack_entry *sp, ClauseDef *cls)
{
yamop **st = (yamop **)NEXTOP(ipc,sp);
yamop **max = st+ipc->u.sp.s1;
/* make sure we get rid of the reference */
while (st < max) {
if (*st && *st == cls->Code) {
*st = NULL;
ipc->u.sp.s2--;
break;
}
st++;
}
/* if the block has a single element */
if (ipc->u.sp.s2 == 1) {
yamop **st = (yamop **)NEXTOP(ipc,sp);
while ((--sp)->flag != block_entry);
while (TRUE) {
if (*st && *st != cls->Code) {
*sp->u.cle.entry_code = *st;
recover_ecls_block(ipc);
return;
}
st++;
}
}
}
static void
add_to_index(struct intermediates *cint, int first, path_stack_entry *sp, ClauseDef *cls) {
/* last clause to experiment with */
PredEntry *ap = cint->CurrentPred;
yamop *ipc = ap->cs.p_code.TrueCodeOfPred;
int group1 = TRUE;
yamop *alt = NULL;
UInt current_arity = 0;
int last_arg = TRUE;
sp = init_block_stack(sp, ipc, ap);
/* try to refine the interval using the indexing code */
while (ipc != NULL) {
op_numbers op = Yap_op_from_opcode(ipc->opc);
switch(op) {
case _try_clause:
/* I cannot expand a predicate that starts on a variable,
have to expand the index.
*/
if (first) {
sp = expanda_block(sp, ap, cls, group1, alt, cint);
ipc = pop_path(&sp, cls, ap);
} else {
/* just go to next instruction */
ipc = NEXTOP(ipc,ld);
}
break;
case _try_clause2:
case _try_clause3:
case _try_clause4:
/* I cannot expand a predicate that starts on a variable,
have to expand the index.
*/
if (first) {
sp = expanda_block(sp, ap, cls, group1, alt, cint);
ipc = pop_path(&sp, cls, ap);
} else {
/* just go to next instruction */
ipc = NEXTOP(ipc,l);
}
break;
case _stale_lu_index:
case _enter_lu_pred:
if (first) {
sp = expanda_block(sp, ap, cls, group1, alt, cint);
} else {
sp = expandz_block(sp, ap, cls, group1, alt, cint);
}
ipc = pop_path(&sp, cls, ap);
break;
case _retry:
/* this clause had no indexing */
ipc = NEXTOP(ipc,ld);
break;
case _retry2:
case _retry3:
case _retry4:
/* this clause had no indexing */
ipc = NEXTOP(ipc,l);
break;
/* instructions type l */
case _retry_me:
/* should never be reached both for asserta */
group1 = FALSE;
ipc = ipc->u.ld.d;
break;
case _try_me:
if (first) {
ipc = NEXTOP(ipc,ld);
alt = ipc->u.ld.d;
} else {
ipc = ipc->u.ld.d;
group1 = FALSE;
}
break;
case _retry_profiled:
case _count_retry:
ipc = NEXTOP(ipc, ld);
break;
case _profiled_trust_me:
case _trust_me:
case _count_trust_me:
group1 = FALSE;
ipc = NEXTOP(ipc, ld);
break;
case _trust_logical_pred:
ipc = NEXTOP(ipc, l);
break;
case _trust:
sp = expandz_block(sp, ap, cls, group1, alt, cint);
ipc = pop_path(&sp, cls, ap);
break;
case _jump:
sp = cross_block(sp, &ipc->u.l.l, ap);
/* just skip for now, but should worry about memory management */
ipc = ipc->u.l.l;
break;
case _jump_if_var:
sp = push_path(sp, &(ipc->u.l.l), cls, cint);
ipc = NEXTOP(ipc,l);
break;
case _jump_if_nonvar:
sp = push_path(sp, &(ipc->u.xll.l2), cls, cint);
sp = cross_block(sp, &ipc->u.xll.l1, ap);
ipc = ipc->u.xll.l1;
break;
/* instructions type EC */
case _try_in:
/* we are done */
if (first) {
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
} else {
ipc = NEXTOP(ipc,l);
}
break;
/* instructions type e */
case _switch_on_type:
sp = push_path(sp, &(ipc->u.llll.l4), cls, cint);
if (ap->PredFlags & LogUpdatePredFlag) {
add_head_info(cls, 1);
} else {
add_info(cls, 1);
}
if (IsPairTerm(cls->Tag)) {
yamop *nipc = ipc->u.llll.l1;
current_arity = 2;
move_next(cls, 1);
if (nipc == FAILCODE) {
/* jump straight to clause */
ipc->u.llll.l1 = cls->CurrentCode;
ipc = pop_path(&sp, cls, ap);
} else {
/* go on */
sp = cross_block(sp, &ipc->u.llll.l1, ap);
ipc = nipc;
}
} else if (IsAtomOrIntTerm(cls->Tag)) {
yamop *nipc = ipc->u.llll.l2;
move_next(cls, 1);
if (nipc == FAILCODE) {
/* need to expand the block */
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
} else {
/* I do not have to worry about crossing a block here */
ipc = nipc;
}
} else if (IsApplTerm(cls->Tag)) {
yamop *nipc = ipc->u.llll.l3;
if (nipc == FAILCODE) {
/* need to expand the block */
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
} else {
/* I do not have to worry about crossing a block here */
ipc = nipc;
}
} else {
/* we can't separate into four groups,
need to restart.
*/
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
}
break;
case _switch_list_nl:
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
break;
case _switch_on_arg_type:
sp = push_path(sp, &(ipc->u.xllll.l4), cls, cint);
if (ap->PredFlags & LogUpdatePredFlag) {
add_head_info(cls, Yap_regtoregno(ipc->u.xllll.x));
} else {
add_info(cls, Yap_regtoregno(ipc->u.xllll.x));
}
if (IsPairTerm(cls->Tag)) {
yamop *nipc = ipc->u.xllll.l1;
current_arity = 2;
move_next(cls, Yap_regtoregno(ipc->u.xllll.x));
if (nipc == FAILCODE) {
/* jump straight to clause */
ipc->u.xllll.l1 = cls->CurrentCode;
ipc = pop_path(&sp, cls, ap);
} else {
/* go on */
sp = cross_block(sp, &ipc->u.xllll.l1, ap);
ipc = nipc;
}
} else if (IsAtomOrIntTerm(cls->Tag)) {
yamop *nipc = ipc->u.xllll.l2;
move_next(cls, Yap_regtoregno(ipc->u.xllll.x));
if (nipc == FAILCODE) {
/* need to expand the block */
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
} else {
/* I do not have to worry about crossing a block here */
ipc = nipc;
}
} else if (IsApplTerm(cls->Tag)) {
yamop *nipc = ipc->u.xllll.l3;
move_next(cls, Yap_regtoregno(ipc->u.xllll.x));
if (nipc == FAILCODE) {
/* need to expand the block */
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
} else {
/* I do not have to worry about crossing a block here */
ipc = nipc;
}
} else {
/* we can't separate into four groups,
need to restart.
*/
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
}
break;
case _switch_on_sub_arg_type:
sp = push_path(sp, &(ipc->u.sllll.l4), cls, cint);
add_arg_info(cls, ap, ipc->u.sllll.s+1);
if (IsPairTerm(cls->Tag)) {
yamop *nipc = ipc->u.sllll.l1;
current_arity = 2;
skip_to_arg(cls, ap, ipc->u.sllll.s, current_arity);
if (current_arity != ipc->u.sllll.s+1) {
last_arg = FALSE;
}
if (nipc == FAILCODE) {
/* jump straight to clause */
ipc->u.sllll.l1 = cls->CurrentCode;
ipc = pop_path(&sp, cls, ap);
} else {
/* go on */
sp = cross_block(sp, &ipc->u.sllll.l1, ap);
ipc = nipc;
}
} else if (IsAtomOrIntTerm(cls->Tag)) {
yamop *nipc = ipc->u.sllll.l2;
skip_to_arg(cls, ap, ipc->u.sllll.s, current_arity);
if (current_arity != ipc->u.sllll.s+1) {
last_arg = FALSE;
}
if (nipc == FAILCODE) {
/* need to expand the block */
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
} else {
/* I do not have to worry about crossing a block here */
ipc = nipc;
}
} else if (IsApplTerm(cls->Tag)) {
yamop *nipc = ipc->u.sllll.l3;
skip_to_arg(cls, ap, ipc->u.sllll.s, current_arity);
if (current_arity != ipc->u.sllll.s+1) {
last_arg = FALSE;
}
if (nipc == FAILCODE) {
/* need to expand the block */
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
} else {
/* I do not have to worry about crossing a block here */
ipc = nipc;
}
} else {
/* we can't separate into four groups,
need to restart.
*/
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
}
break;
case _if_not_then:
ipc = pop_path(&sp, cls, ap);
break;
/* instructions type ollll */
case _switch_on_func:
case _if_func:
case _go_on_func:
{
FuncSwiEntry *fe;
yamop *newpc;
Functor f = (Functor)RepAppl(cls->Tag);
if (op == _switch_on_func) {
fe = lookup_f_hash(f, ipc->u.sssl.l, ipc->u.sssl.s);
} else {
fe = lookup_f(f, ipc->u.sssl.l, ipc->u.sssl.s);
}
if (!IsExtensionFunctor(f)) {
current_arity = ArityOfFunctor(f);
}
newpc = (yamop *)(fe->Label);
if (newpc == (yamop *)&(ap->cs.p_code.ExpandCode)) {
/* we found it */
ipc = pop_path(&sp, cls, ap);
} else if (newpc == FAILCODE) {
/* oops, nothing there */
if (fe->Tag != f) {
if (IsExtensionFunctor(f)) {
sp = kill_unsafe_block(sp, op, ap, first, FALSE, cls);
ipc = pop_path(&sp, cls, ap);
break;
}
if (table_fe_overflow(ipc, f)) {
fe = expand_ftable(ipc, current_block(sp), cint, f);
}
fe->Tag = f;
ipc->u.sssl.e++;
}
fe->Label = (UInt)cls->CurrentCode;
ipc = pop_path(&sp, cls, ap);
} else {
yamop *newpc = (yamop *)(fe->Label);
sp = fetch_new_block(sp, &(ipc->u.sssl.l), ap);
sp = cross_block(sp, (yamop **)&(fe->Label), ap);
ipc = newpc;
}
}
break;
case _index_dbref:
cls->Tag = cls->u.t_ptr;
ipc = NEXTOP(ipc,e);
break;
case _index_blob:
cls->Tag = MkIntTerm(RepAppl(cls->u.t_ptr)[1]);
ipc = NEXTOP(ipc,e);
break;
case _switch_on_cons:
case _if_cons:
case _go_on_cons:
{
AtomSwiEntry *ae;
yamop *newpc;
Term at = cls->Tag;
if (op == _switch_on_cons) {
ae = lookup_c_hash(at,ipc->u.sssl.l,ipc->u.sssl.s);
} else {
ae = lookup_c(at, ipc->u.sssl.l, ipc->u.sssl.s);
}
newpc = (yamop *)(ae->Label);
if (newpc == (yamop *)&(ap->cs.p_code.ExpandCode)) {
/* nothing more to do */
ipc = pop_path(&sp, cls, ap);
} else if (newpc == FAILCODE) {
/* oops, nothing there */
if (ae->Tag != at) {
if (table_ae_overflow(ipc, at)) {
ae = expand_ctable(ipc, current_block(sp), cint, at);
}
ae->Tag = at;
ipc->u.sssl.e++;
}
ae->Label = (UInt)cls->CurrentCode;
ipc = pop_path(&sp, cls, ap);
} else {
yamop *newpc = (yamop *)(ae->Label);
sp = fetch_new_block(sp, &(ipc->u.sssl.l), ap);
sp = cross_block(sp, (yamop **)&(ae->Label), ap);
ipc = newpc;
}
}
break;
case _expand_clauses:
ipc = add_to_expand_clauses(&sp, ipc, cls, ap, first);
break;
case _expand_index:
ipc = pop_path(&sp, cls, ap);
break;
case _lock_lu:
ipc = NEXTOP(ipc,p);
break;
case _unlock_lu:
ipc = NEXTOP(ipc,e);
break;
case _op_fail:
while ((--sp)->flag != block_entry);
*sp->u.cle.entry_code = cls->Code;
ipc = pop_path(&sp, cls, ap);
break;
default:
sp = kill_unsafe_block(sp, op, ap, first, FALSE, cls);
ipc = pop_path(&sp, cls, ap);
}
}
}
void
Yap_AddClauseToIndex(PredEntry *ap, yamop *beg, int first) {
ClauseDef cl;
/* first clause */
path_stack_entry *stack, *sp;
int cb;
struct intermediates cint;
if (!(ap->PredFlags & LogUpdatePredFlag)) {
if (ap->PredFlags & IndexedPredFlag)
Yap_RemoveIndexation(ap);
return;
}
cint.CurrentPred = ap;
cint.expand_block = NULL;
cint.CodeStart = cint.BlobsStart = cint.cpc = cint.icpc = NIL;
if ((cb = setjmp(cint.CompilerBotch)) == 3) {
restore_machine_regs();
Yap_gcl(Yap_Error_Size, ap->ArityOfPE, ENV, CP);
save_machine_regs();
} else if (cb == 2) {
restore_machine_regs();
Yap_growheap(FALSE, Yap_Error_Size, NULL);
save_machine_regs();
} else if (cb == 4) {
restore_machine_regs();
Yap_growtrail(Yap_Error_Size, FALSE);
save_machine_regs();
}
if (cb) {
Yap_RemoveIndexation(ap);
return;
}
Yap_Error_Size = 0;
Yap_ErrorMessage = NULL;
#ifdef DEBUG
if (Yap_Option['i' - 'a' + 1]) {
Term tmod = ap->ModuleOfPred;
if (!tmod) tmod = TermProlog;
Yap_DebugPutc(Yap_c_error_stream,'+');
Yap_DebugPutc(Yap_c_error_stream,'\t');
Yap_plwrite(tmod, Yap_DebugPutc, 0);
Yap_DebugPutc(Yap_c_error_stream,':');
if (ap->ModuleOfPred == IDB_MODULE) {
Term t = Deref(ARG1);
if (IsAtomTerm(t)) {
Yap_plwrite(t, Yap_DebugPutc, 0);
} else if (IsIntegerTerm(t)) {
Yap_plwrite(t, Yap_DebugPutc, 0);
} else {
Functor f = FunctorOfTerm(t);
Atom At = NameOfFunctor(f);
Yap_plwrite(MkAtomTerm(At), Yap_DebugPutc, 0);
Yap_DebugPutc(Yap_c_error_stream,'/');
Yap_plwrite(MkIntTerm(ArityOfFunctor(f)), Yap_DebugPutc, 0);
}
} else {
if (ap->ArityOfPE == 0) {
Atom At = (Atom)ap->FunctorOfPred;
Yap_plwrite(MkAtomTerm(At), Yap_DebugPutc, 0);
} else {
Functor f = ap->FunctorOfPred;
Atom At = NameOfFunctor(f);
Yap_plwrite(MkAtomTerm(At), Yap_DebugPutc, 0);
Yap_DebugPutc(Yap_c_error_stream,'/');
Yap_plwrite(MkIntTerm(ArityOfFunctor(f)), Yap_DebugPutc, 0);
}
}
Yap_DebugPutc(Yap_c_error_stream,'\n');
}
#endif
stack = (path_stack_entry *)TR;
cl.Code = cl.CurrentCode = beg;
sp = push_path(stack, NULL, &cl, &cint);
add_to_index(&cint, first, sp, &cl);
}
static void
contract_ftable(yamop *ipc, ClauseUnion *blk, PredEntry *ap, Functor f) {
int n = ipc->u.sssl.s;
FuncSwiEntry *fep;
if (n > MIN_HASH_ENTRIES) {
fep = lookup_f_hash(f, ipc->u.sssl.l, n);
} else {
fep = (FuncSwiEntry *)(ipc->u.sssl.l);
while (fep->Tag != f) fep++;
}
fep->Label = (CELL)FAILCODE;
}
static void
contract_ctable(yamop *ipc, ClauseUnion *blk, PredEntry *ap, Term at) {
int n = ipc->u.sssl.s;
AtomSwiEntry *cep;
if (n > MIN_HASH_ENTRIES) {
cep = lookup_c_hash(at, ipc->u.sssl.l, n);
} else {
cep = (AtomSwiEntry *)(ipc->u.sssl.l);
while (cep->Tag != at) cep++;
}
cep->Label = (CELL)FAILCODE;
}
static void
remove_from_index(PredEntry *ap, path_stack_entry *sp, ClauseDef *cls, yamop *bg, yamop *lt, struct intermediates *cint) {
/* last clause to experiment with */
yamop *ipc = ap->cs.p_code.TrueCodeOfPred;
UInt current_arity = 0;
sp = init_block_stack(sp, ipc, ap);
if (ap->cs.p_code.NOfClauses == 1) {
if (ap->PredFlags & IndexedPredFlag) {
Yap_RemoveIndexation(ap);
return;
}
ap->cs.p_code.TrueCodeOfPred = ap->cs.p_code.FirstClause;
if (ap->PredFlags & SpiedPredFlag) {
ap->OpcodeOfPred = Yap_opcode(_spy_pred);
ap->CodeOfPred = (yamop *)(&(ap->OpcodeOfPred));
} else {
ap->OpcodeOfPred = ap->cs.p_code.FirstClause->opc;
ap->CodeOfPred = ap->cs.p_code.TrueCodeOfPred;
}
return;
}
/* try to refine the interval using the indexing code */
while (ipc != NULL) {
op_numbers op = Yap_op_from_opcode(ipc->opc);
switch(op) {
case _retry_profiled:
case _count_retry:
ipc = NEXTOP(ipc, p);
break;
case _try_in:
/* I cannot expand a predicate that starts on a variable,
have to expand the index.
*/
if (IN_BETWEEN(bg,ipc->u.l.l,lt)) {
sp = kill_clause(ipc, bg, lt, sp, ap);
ipc = pop_path(&sp, cls, ap);
} else {
/* just go to next instruction */
ipc = NEXTOP(ipc,l);
}
break;
case _try_clause:
case _retry:
/* I cannot expand a predicate that starts on a variable,
have to expand the index.
*/
if (IN_BETWEEN(bg,ipc->u.ld.d,lt)) {
sp = kill_clause(ipc, bg, lt, sp, ap);
ipc = pop_path(&sp, cls, ap);
} else {
/* just go to next instruction */
ipc = NEXTOP(ipc,ld);
}
break;
case _try_clause2:
case _try_clause3:
case _try_clause4:
case _retry2:
case _retry3:
case _retry4:
/* I cannot expand a predicate that starts on a variable,
have to expand the index.
*/
if (IN_BETWEEN(bg,ipc->u.l.l,lt)) {
sp = kill_clause(ipc, bg, lt, sp, ap);
ipc = pop_path(&sp, cls, ap);
} else {
/* just go to next instruction */
ipc = NEXTOP(ipc,l);
}
break;
case _trust_logical_pred:
ipc = NEXTOP(ipc,l);
break;
case _trust:
if (IN_BETWEEN(bg,ipc->u.ld.d,lt)) {
sp = kill_clause(ipc, bg, lt, sp, ap);
}
ipc = pop_path(&sp, cls, ap);
break;
case _stale_lu_index:
case _enter_lu_pred:
sp = kill_clause(ipc, bg, lt, sp, ap);
ipc = pop_path(&sp, cls, ap);
break;
/* instructions type l */
case _try_me:
case _retry_me:
sp = push_path(sp, &(ipc->u.ld.d), cls, cint);
ipc = NEXTOP(ipc,ld);
break;
case _profiled_trust_me:
case _trust_me:
case _count_trust_me:
ipc = NEXTOP(ipc,ld);
break;
case _jump:
sp = cross_block(sp, &ipc->u.l.l, ap);
/* just skip for now, but should worry about memory management */
ipc = ipc->u.l.l;
break;
case _jump_if_var:
sp = push_path(sp, &(ipc->u.l.l), cls, cint);
ipc = NEXTOP(ipc,l);
break;
case _jump_if_nonvar:
sp = push_path(sp, &(ipc->u.xll.l2), cls, cint);
sp = cross_block(sp, &ipc->u.xll.l1, ap);
ipc = ipc->u.xll.l1;
break;
/* instructions type e */
case _switch_on_type:
sp = push_path(sp, &(ipc->u.llll.l4), cls, cint);
if (ap->PredFlags & LogUpdatePredFlag) {
add_head_info(cls, 1);
} else {
add_info(cls, 1);
}
if (IsPairTerm(cls->Tag)) {
yamop *nipc = ipc->u.llll.l1;
current_arity = 2;
if (IN_BETWEEN(bg,nipc,lt)) {
/* jump straight to clause */
ipc->u.llll.l1 = FAILCODE;
ipc = pop_path(&sp, cls, ap);
} else {
/* go on */
sp = cross_block(sp, &ipc->u.llll.l1, ap);
ipc = nipc;
}
} else if (IsAtomOrIntTerm(cls->Tag)) {
yamop *nipc = ipc->u.llll.l2;
if (IN_BETWEEN(bg,nipc,lt)) {
/* jump straight to clause */
ipc->u.llll.l2 = FAILCODE;
ipc = pop_path(&sp, cls, ap);
} else {
/* I do not have to worry about crossing a block here */
ipc = nipc;
}
} else if (IsApplTerm(cls->Tag)) {
yamop *nipc = ipc->u.llll.l3;
if (IN_BETWEEN(bg,nipc,lt)) {
/* jump straight to clause */
ipc->u.llll.l3 = FAILCODE;
ipc = pop_path(&sp, cls, ap);
} else {
/* I do not have to worry about crossing a block here */
ipc = nipc;
}
} else {
/* we can't separate into four groups,
need to restart.
*/
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
}
break;
case _switch_list_nl:
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
break;
case _switch_on_arg_type:
sp = push_path(sp, &(ipc->u.xllll.l4), cls, cint);
current_arity = 2;
if (ap->PredFlags & LogUpdatePredFlag) {
add_head_info(cls, Yap_regtoregno(ipc->u.xllll.x));
} else {
add_info(cls, Yap_regtoregno(ipc->u.xllll.x));
}
if (IsPairTerm(cls->Tag)) {
yamop *nipc = ipc->u.xllll.l1;
if (IN_BETWEEN(bg,nipc,lt)) {
/* jump straight to clause */
ipc->u.xllll.l1 = FAILCODE;
ipc = pop_path(&sp, cls, ap);
} else {
/* go on */
sp = cross_block(sp, &ipc->u.xllll.l1, ap);
ipc = nipc;
}
} else if (IsAtomOrIntTerm(cls->Tag)) {
yamop *nipc = ipc->u.xllll.l2;
if (IN_BETWEEN(bg,nipc,lt)) {
/* jump straight to clause */
ipc->u.xllll.l2 = FAILCODE;
ipc = pop_path(&sp, cls, ap);
} else {
/* I do not have to worry about crossing a block here */
ipc = nipc;
}
} else if (IsApplTerm(cls->Tag)) {
yamop *nipc = ipc->u.xllll.l3;
if (IN_BETWEEN(bg,nipc,lt)) {
/* jump straight to clause */
ipc->u.xllll.l3 = FAILCODE;
ipc = pop_path(&sp, cls, ap);
} else {
/* I do not have to worry about crossing a block here */
ipc = nipc;
}
} else {
/* we can't separate into four groups,
need to restart.
*/
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
}
break;
case _switch_on_sub_arg_type:
sp = push_path(sp, &(ipc->u.sllll.l4), cls, cint);
current_arity = 2;
add_arg_info(cls, ap, ipc->u.sllll.s+1);
if (IsPairTerm(cls->Tag)) {
yamop *nipc = ipc->u.sllll.l1;
if (IN_BETWEEN(bg,nipc,lt)) {
/* jump straight to clause */
ipc->u.sllll.l1 = FAILCODE;
ipc = pop_path(&sp, cls, ap);
} else {
/* go on */
sp = cross_block(sp, &ipc->u.sllll.l1, ap);
ipc = nipc;
}
} else if (IsAtomOrIntTerm(cls->Tag)) {
yamop *nipc = ipc->u.sllll.l2;
if (IN_BETWEEN(bg,nipc,lt)) {
/* jump straight to clause */
ipc->u.sllll.l2 = FAILCODE;
ipc = pop_path(&sp, cls, ap);
} else {
/* I do not have to worry about crossing a block here */
ipc = nipc;
}
} else if (IsApplTerm(cls->Tag)) {
yamop *nipc = ipc->u.sllll.l3;
if (IN_BETWEEN(bg,nipc,lt)) {
/* jump straight to clause */
ipc->u.sllll.l3 = FAILCODE;
ipc = pop_path(&sp, cls, ap);
} else {
/* I do not have to worry about crossing a block here */
ipc = nipc;
}
} else {
/* we can't separate into four groups,
need to restart.
*/
sp = kill_block(sp, ap);
ipc = pop_path(&sp, cls, ap);
}
break;
case _if_not_then:
ipc = pop_path(&sp, cls, ap);
break;
/* instructions type ollll */
case _switch_on_func:
case _if_func:
case _go_on_func:
{
FuncSwiEntry *fe;
yamop *newpc;
Functor f = (Functor)RepAppl(cls->Tag);
if (op == _switch_on_func) {
fe = lookup_f_hash(f, ipc->u.sssl.l, ipc->u.sssl.s);
} else {
fe = lookup_f(f, ipc->u.sssl.l, ipc->u.sssl.s);
}
if (!IsExtensionFunctor(f)) {
current_arity = ArityOfFunctor(f);
}
newpc = (yamop *)(fe->Label);
if (newpc == (yamop *)&(ap->cs.p_code.ExpandCode)) {
/* we found it */
ipc = pop_path(&sp, cls, ap);
} else if (newpc == FAILCODE) {
ipc = pop_path(&sp, cls, ap);
} else if (IN_BETWEEN(bg,fe->Label,lt)) {
/* oops, nothing there */
contract_ftable(ipc, current_block(sp), ap, f);
ipc = pop_path(&sp, cls, ap);
} else {
yamop *newpc = (yamop *)(fe->Label);
sp = fetch_new_block(sp, &(ipc->u.sssl.l), ap);
sp = cross_block(sp, (yamop **)&(fe->Label), ap);
ipc = newpc;
}
}
break;
case _index_dbref:
cls->Tag = cls->u.t_ptr;
ipc = NEXTOP(ipc,e);
break;
case _index_blob:
cls->Tag = MkIntTerm(RepAppl(cls->u.t_ptr)[1]);
ipc = NEXTOP(ipc,e);
break;
case _switch_on_cons:
case _if_cons:
case _go_on_cons:
{
AtomSwiEntry *ae;
yamop *newpc;
Term at = cls->Tag;
if (op == _switch_on_cons) {
ae = lookup_c_hash(at,ipc->u.sssl.l,ipc->u.sssl.s);
} else {
ae = lookup_c(at, ipc->u.sssl.l, ipc->u.sssl.s);
}
newpc = (yamop *)(ae->Label);
if (newpc == (yamop *)&(ap->cs.p_code.ExpandCode)) {
/* we found it */
ipc = pop_path(&sp, cls, ap);
} else if (newpc == FAILCODE) {
ipc = pop_path(&sp, cls, ap);
} else if (IN_BETWEEN(bg,ae->Label,lt)) {
/* oops, nothing there */
contract_ctable(ipc, current_block(sp), ap, at);
ipc = pop_path(&sp, cls, ap);
} else {
yamop *newpc = (yamop *)(ae->Label);
sp = fetch_new_block(sp, &(ipc->u.sssl.l), ap);
sp = cross_block(sp, (yamop **)&(ae->Label), ap);
ipc = newpc;
}
}
break;
case _expand_index:
ipc = pop_path(&sp, cls, ap);
break;
case _expand_clauses:
nullify_expand_clause(ipc, sp, cls);
ipc = pop_path(&sp, cls, ap);
break;
case _lock_lu:
ipc = NEXTOP(ipc,p);
break;
case _unlock_lu:
ipc = NEXTOP(ipc,e);
break;
default:
if (IN_BETWEEN(bg,ipc,lt)) {
sp = kill_unsafe_block(sp, op, ap, TRUE, TRUE, cls);
}
ipc = pop_path(&sp, cls, ap);
}
}
}
/* clause is locked */
void
Yap_RemoveClauseFromIndex(PredEntry *ap, yamop *beg) {
ClauseDef cl;
/* first clause */
path_stack_entry *stack, *sp;
int cb;
yamop *last;
struct intermediates cint;
if (ap->PredFlags & MegaClausePredFlag) {
return;
}
cint.expand_block = NULL;
cint.CodeStart = cint.BlobsStart = cint.cpc = cint.icpc = NULL;
if ((cb = setjmp(cint.CompilerBotch)) == 3) {
restore_machine_regs();
Yap_gcl(Yap_Error_Size, ap->ArityOfPE, ENV, CP);
save_machine_regs();
} else if (cb == 2) {
restore_machine_regs();
Yap_growheap(FALSE, Yap_Error_Size, NULL);
save_machine_regs();
} else if (cb == 4) {
restore_machine_regs();
Yap_growtrail(Yap_Error_Size, FALSE);
save_machine_regs();
}
Yap_Error_Size = 0;
Yap_ErrorMessage = NULL;
if (cb) {
/* cannot rely on the code */
if (ap->PredFlags & LogUpdatePredFlag) {
Yap_kill_iblock((ClauseUnion *)ClauseCodeToLogUpdIndex(ap->cs.p_code.TrueCodeOfPred),NULL, ap);
} else {
StaticIndex *cl;
cl = ClauseCodeToStaticIndex(ap->cs.p_code.TrueCodeOfPred);
Yap_kill_iblock((ClauseUnion *)cl, NULL, ap);
}
return;
}
#ifdef DEBUG
if (Yap_Option['i' - 'a' + 1]) {
Term tmod = ap->ModuleOfPred;
if (!tmod) tmod = TermProlog;
Yap_DebugPutc(Yap_c_error_stream,'-');
Yap_DebugPutc(Yap_c_error_stream,'\t');
Yap_plwrite(tmod, Yap_DebugPutc, 0);
Yap_DebugPutc(Yap_c_error_stream,':');
if (ap->ModuleOfPred != IDB_MODULE) {
if (ap->ArityOfPE == 0) {
Atom At = (Atom)ap->FunctorOfPred;
Yap_plwrite(MkAtomTerm(At), Yap_DebugPutc, 0);
} else {
Functor f = ap->FunctorOfPred;
Atom At = NameOfFunctor(f);
Yap_plwrite(MkAtomTerm(At), Yap_DebugPutc, 0);
Yap_DebugPutc(Yap_c_error_stream,'/');
Yap_plwrite(MkIntTerm(ArityOfFunctor(f)), Yap_DebugPutc, 0);
}
} else {
if (ap->PredFlags & NumberDBPredFlag) {
Int id = ap->src.IndxId;
Yap_plwrite(MkIntegerTerm(id), Yap_DebugPutc, 0);
} else if (ap->PredFlags & AtomDBPredFlag) {
Atom At = (Atom)ap->FunctorOfPred;
Yap_plwrite(MkAtomTerm(At), Yap_DebugPutc, 0);
} else {
Functor f = ap->FunctorOfPred;
Atom At = NameOfFunctor(f);
Yap_plwrite(MkAtomTerm(At), Yap_DebugPutc, 0);
Yap_DebugPutc(Yap_c_error_stream,'/');
Yap_plwrite(MkIntTerm(ArityOfFunctor(f)), Yap_DebugPutc, 0);
}
}
Yap_DebugPutc(Yap_c_error_stream,'\n');
}
#endif
stack = (path_stack_entry *)TR;
if (ap->PredFlags & LogUpdatePredFlag) {
LogUpdClause *c = ClauseCodeToLogUpdClause(beg);
cl.Code = cl.CurrentCode = beg;
last = (yamop *)((CODEADDR)c+c->ClSize);
} else {
StaticClause *c = ClauseCodeToStaticClause(beg);
cl.Code = cl.CurrentCode = beg;
last = (yamop *)((CODEADDR)c+c->ClSize);
}
sp = push_path(stack, NULL, &cl, &cint);
if (ap->cs.p_code.NOfClauses == 0) {
/* there was no indexing code */
ap->CodeOfPred = ap->cs.p_code.TrueCodeOfPred = FAILCODE;
ap->OpcodeOfPred = Yap_opcode(_op_fail);
} else {
remove_from_index(ap, sp, &cl, beg, last, &cint);
}
}
static void
store_clause_choice_point(Term t1, Term tb, Term tr, yamop *ipc, PredEntry *pe, yamop *ap_pc, yamop *cp_pc)
{
Term tpc = MkIntegerTerm((Int)ipc);
Term tpe = MkIntegerTerm((Int)pe);
CELL *tsp = ASP-5;
choiceptr bptr = ((choiceptr)tsp)-1;
tsp[0] = tpe;
tsp[1] = tpc;
tsp[2] = t1;
tsp[3] = tb;
tsp[4] = tr;
bptr->cp_tr = TR;
HB = bptr->cp_h = H;
#ifdef DEPTH_LIMIT
bptr->cp_depth = DEPTH;
#endif
bptr->cp_b = B;
bptr->cp_cp = cp_pc;
bptr->cp_ap = ap_pc;
bptr->cp_env = ENV;
/* now, install the new YREG =*/
ASP = (CELL *)bptr;
ASP[E_CB] = (CELL)bptr;
B = bptr;
#ifdef YAPOR
SCH_set_load(B);
#endif /* YAPOR */
SET_BB(bptr);
}
static void
update_clause_choice_point(yamop *ipc, yamop *ap_pc)
{
Term tpc = MkIntegerTerm((Int)ipc);
B->cp_args[1] = tpc;
B->cp_h = H;
B->cp_ap = ap_pc;
}
static LogUpdClause *
to_clause(yamop *ipc, PredEntry *ap)
{
if (ap->PredFlags & LogUpdatePredFlag)
return lu_clause(ipc);
else if (ap->PredFlags & MegaClausePredFlag)
return (LogUpdClause *)ipc;
else
return (LogUpdClause *)simple_static_clause(ipc);
}
LogUpdClause *
Yap_FollowIndexingCode(PredEntry *ap, yamop *ipc, Term Terms[3], yamop *ap_pc, yamop *cp_pc)
{
CELL *s_reg = NULL;
Term t = TermNil;
yamop *start_pc = ipc;
choiceptr b0 = NULL;
yamop **jlbl = NULL;
int lu_pred = ap->PredFlags & LogUpdatePredFlag;
if (ap->ModuleOfPred != IDB_MODULE) {
if (ap->ArityOfPE) {
CELL *tar = RepAppl(Deref(Terms[0]));
UInt i;
for (i = 1; i <= ap->ArityOfPE; i++) {
XREGS[i] = tar[i];
}
}
}
/* try to refine the interval using the indexing code */
while (ipc != NULL) {
op_numbers op = Yap_op_from_opcode(ipc->opc);
switch(op) {
case _try_in:
update_clause_choice_point(NEXTOP(ipc,l), ap_pc);
if (lu_pred)
return lu_clause(ipc->u.l.l);
else
return (LogUpdClause *)static_clause(ipc->u.l.l, ap);
break;
case _try_clause:
if (b0 == NULL)
store_clause_choice_point(Terms[0], Terms[1], Terms[2], NEXTOP(ipc,ld), ap, ap_pc, cp_pc);
else
update_clause_choice_point(NEXTOP(ipc,ld), ap_pc);
if (lu_pred)
return lu_clause(ipc->u.ld.d);
else
return (LogUpdClause *)static_clause(ipc->u.ld.d, ap);
case _try_clause2:
case _try_clause3:
case _try_clause4:
if (b0 == NULL)
store_clause_choice_point(Terms[0], Terms[1], Terms[2], NEXTOP(ipc,l), ap, ap_pc, cp_pc);
else
update_clause_choice_point(NEXTOP(ipc,l), ap_pc);
if (lu_pred)
return lu_clause(ipc->u.l.l);
else
return (LogUpdClause *)static_clause(ipc->u.l.l, ap);
case _try_me:
if (b0 == NULL)
store_clause_choice_point(Terms[0], Terms[1], Terms[2], ipc->u.ld.d, ap, ap_pc, cp_pc);
else
update_clause_choice_point(ipc->u.ld.d, ap_pc);
ipc = NEXTOP(ipc,ld);
break;
case _retry_profiled:
case _count_retry:
ipc = NEXTOP(ipc,p);
break;
case _retry:
update_clause_choice_point(NEXTOP(ipc,ld),ap_pc);
if (lu_pred)
return lu_clause(ipc->u.ld.d);
else
return (LogUpdClause *)static_clause(ipc->u.ld.d, ap);
case _retry2:
case _retry3:
case _retry4:
update_clause_choice_point(NEXTOP(ipc,l),ap_pc);
if (lu_pred)
return lu_clause(ipc->u.l.l);
else
return (LogUpdClause *)static_clause(ipc->u.l.l, ap);
case _retry_me:
update_clause_choice_point(ipc->u.ld.d,ap_pc);
ipc = NEXTOP(ipc,ld);
break;
case _trust:
#ifdef CUT_C
{
while (POP_CHOICE_POINT(B->cp_b))
{
POP_EXECUTE();
}
}
#endif /* CUT_C */
#ifdef YAPOR
{
choiceptr cut_pt;
cut_pt = B->cp_b;
CUT_prune_to(cut_pt);
B = cut_pt;
}
#else
B = B->cp_b;
#endif /* YAPOR */
b0 = B;
if (lu_pred)
return lu_clause(ipc->u.ld.d);
else
return (LogUpdClause *)static_clause(ipc->u.ld.d, ap);
case _profiled_trust_me:
case _trust_me:
case _count_trust_me:
#ifdef CUT_C
{
while (POP_CHOICE_POINT(B->cp_b))
{
POP_EXECUTE();
}
}
#endif /* CUT_C */
#ifdef YAPOR
{
choiceptr cut_pt;
cut_pt = B->cp_b;
CUT_prune_to(cut_pt);
B = cut_pt;
}
#else
B = B->cp_b;
#endif /* YAPOR */
ipc = NEXTOP(ipc,ld);
break;
case _trust_logical_pred:
{
LogUpdIndex *cl = (LogUpdIndex *)ipc->u.l.l;
/* check if we are the ones using this code */
ipc = NEXTOP(ipc,l);
#if defined(YAPOR) || defined(THREADS)
LOCK(cl->ClLock);
DEC_CLREF_COUNT(cl);
/* clear the entry from the trail */
TR = --(B->cp_tr);
/* actually get rid of the code */
if (cl->ClRefCount == 0 && cl->ClFlags & ErasedMask) {
UNLOCK(cl->ClLock);
/* I am the last one using this clause, hence I don't need a lock
to dispose of it
*/
ipc = Yap_ErLogUpdIndex(cl, ipc);
} else {
UNLOCK(cl->ClLock);
}
#else
if (TrailTerm(B->cp_tr-1) == CLREF_TO_TRENTRY(cl) &&
B->cp_tr != B->cp_b->cp_tr) {
cl->ClFlags &= ~InUseMask;
/* clear the entry from the trail */
TR = --(B->cp_tr);
/* next, recover space for the indexing code if it was erased */
if (cl->ClFlags & ErasedMask) {
yamop *next = ipc->u.ld.d;
if (next != FAILCODE) {
LogUpdClause *lcl = ClauseCodeToLogUpdClause(next);
/* make sure we don't erase the clause we are jumping too */
if (lcl->ClRefCount == 1 && !(lcl->ClFlags & InUseMask)) {
lcl->ClFlags |= InUseMask;
TRAIL_CLREF(lcl);
}
}
ipc = Yap_ErLogUpdIndex(cl, ipc);
}
}
#endif
}
break;
case _stale_lu_index:
#if defined(YAPOR) || defined(THREADS)
LOCK(ap->PELock);
if (!same_lu_block(jlbl, ipc)) {
ipc = *jlbl;
UNLOCK(ap->PELock);
break;
}
#endif
while (TRUE) {
yamop *nipc = clean_up_index(ipc->u.Ill.I, jlbl, ap);
if (nipc == NULL) {
/* not enough space */
H[0] = Terms[0];
H[1] = Terms[1];
H[2] = Terms[2];
H += 3;
if (!Yap_growheap(FALSE, Yap_Error_Size, NULL)) {
UNLOCK(ap->PELock);
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, Yap_ErrorMessage);
return NULL;
}
H -= 3;
Terms[0] = H[0];
Terms[1] = H[1];
Terms[2] = H[2];
} else {
UNLOCK(ap->PELock);
ipc = nipc;
break;
}
}
break;
case _enter_lu_pred:
{
LogUpdIndex *cl = ipc->u.Ill.I;
LOCK(cl->ClLock);
/* indicate the indexing code is being used */
#if defined(YAPOR) || defined(THREADS)
/* just store a reference */
INC_CLREF_COUNT(cl);
TRAIL_CLREF(cl);
#else
if (!(cl->ClFlags & InUseMask)) {
cl->ClFlags |= InUseMask;
TRAIL_CLREF(cl);
}
#endif
UNLOCK(cl->ClLock);
}
ipc = ipc->u.Ill.l1;
break;
case _jump:
ipc = ipc->u.l.l;
break;
case _jump_if_var:
{
Term t = Deref(ARG1);
if (IsVarTerm(t)) {
jlbl = &(ipc->u.l.l);
ipc = ipc->u.l.l;
} else {
ipc = NEXTOP(ipc,l);
}
}
break;
case _jump_if_nonvar:
{
Term t = Deref(XREGS[arg_from_x(ipc->u.xll.x)]);
if (!IsVarTerm(t)) {
jlbl = &(ipc->u.xll.l1);
ipc = ipc->u.xll.l1;
} else {
ipc = NEXTOP(ipc,xll);
}
}
break;
/* instructions type e */
case _switch_on_type:
t = Deref(ARG1);
if (IsVarTerm(t)) {
jlbl = &(ipc->u.llll.l4);
ipc = ipc->u.llll.l4;
} else if (IsPairTerm(t)) {
jlbl = &(ipc->u.llll.l1);
ipc = ipc->u.llll.l1;
s_reg = RepPair(t);
} else if (IsAtomOrIntTerm(t)) {
jlbl = &(ipc->u.llll.l2);
ipc = ipc->u.llll.l2;
} else {
jlbl = &(ipc->u.llll.l3);
ipc = ipc->u.llll.l3;
}
break;
case _switch_list_nl:
t = Deref(ARG1);
if (IsVarTerm(t)) {
jlbl = &(ipc->u.ollll.l4);
ipc = ipc->u.ollll.l4;
} else if (IsPairTerm(t)) {
jlbl = &(ipc->u.ollll.l1);
ipc = ipc->u.ollll.l1;
s_reg = RepPair(t);
} else if (t == TermNil) {
jlbl = &(ipc->u.ollll.l2);
ipc = ipc->u.ollll.l2;
} else {
jlbl = &(ipc->u.ollll.l3);
ipc = ipc->u.ollll.l3;
}
break;
case _switch_on_arg_type:
t = Deref(XREGS[arg_from_x(ipc->u.xllll.x)]);
if (IsVarTerm(t)) {
jlbl = &(ipc->u.xllll.l4);
ipc = ipc->u.xllll.l4;
} else if (IsPairTerm(t)) {
jlbl = &(ipc->u.xllll.l1);
ipc = ipc->u.xllll.l1;
s_reg = RepPair(t);
} else if (IsAtomOrIntTerm(t)) {
jlbl = &(ipc->u.xllll.l1);
ipc = ipc->u.xllll.l2;
} else {
jlbl = &(ipc->u.xllll.l3);
ipc = ipc->u.xllll.l3;
}
break;
case _switch_on_sub_arg_type:
t = Deref(s_reg[ipc->u.sllll.s]);
if (IsVarTerm(t)) {
jlbl = &(ipc->u.sllll.l4);
ipc = ipc->u.sllll.l4;
} else if (IsPairTerm(t)) {
jlbl = &(ipc->u.sllll.l1);
ipc = ipc->u.sllll.l1;
s_reg = RepPair(t);
} else if (IsAtomOrIntTerm(t)) {
jlbl = &(ipc->u.sllll.l2);
ipc = ipc->u.sllll.l2;
} else {
jlbl = &(ipc->u.sllll.l3);
ipc = ipc->u.sllll.l3;
}
break;
case _if_not_then:
t = Deref(ARG1);
if (IsVarTerm(t)) {
jlbl = &(ipc->u.clll.l3);
ipc = ipc->u.clll.l3;
} else if (!IsVarTerm(t) && t != ipc->u.clll.c) {
jlbl = &(ipc->u.clll.l1);
ipc = ipc->u.clll.l1;
} else {
jlbl = &(ipc->u.clll.l2);
ipc = ipc->u.clll.l2;
}
break;
/* instructions type ollll */
case _switch_on_func:
case _if_func:
case _go_on_func:
{
FuncSwiEntry *fe;
Functor f;
s_reg = RepAppl(t);
f = (Functor)s_reg[0];
s_reg++;
if (op == _switch_on_func) {
fe = lookup_f_hash(f, ipc->u.sssl.l, ipc->u.sssl.s);
} else {
fe = lookup_f(f, ipc->u.sssl.l, ipc->u.sssl.s);
}
jlbl = (yamop **)(&fe->Label);
ipc = (yamop *)(fe->Label);
}
break;
case _index_dbref:
t = AbsAppl(s_reg-1);
ipc = NEXTOP(ipc,e);
break;
case _index_blob:
t = MkIntTerm(s_reg[0]);
ipc = NEXTOP(ipc,e);
break;
case _switch_on_cons:
case _if_cons:
case _go_on_cons:
{
AtomSwiEntry *ae;
if (op == _switch_on_cons) {
ae = lookup_c_hash(t, ipc->u.sssl.l, ipc->u.sssl.s);
} else {
ae = lookup_c(t, ipc->u.sssl.l, ipc->u.sssl.s);
}
jlbl = (yamop **)(&ae->Label);
ipc = (yamop *)(ae->Label);
}
break;
case _expand_index:
case _expand_clauses:
XREGS[ap->ArityOfPE+1] = (CELL)s_reg;
XREGS[ap->ArityOfPE+2] = (CELL)t;
XREGS[ap->ArityOfPE+3] = Terms[0];
XREGS[ap->ArityOfPE+4] = Terms[1];
XREGS[ap->ArityOfPE+5] = Terms[2];
LOCK(ap->PELock);
#if defined(YAPOR) || defined(THREADS)
if (!same_lu_block(jlbl, ipc)) {
ipc = *jlbl;
UNLOCK(ap->PELock);
break;
}
#endif
ipc = ExpandIndex(ap, 5);
UNLOCK(ap->PELock);
s_reg = (CELL *)XREGS[ap->ArityOfPE+1];
t = XREGS[ap->ArityOfPE+2];
Terms[0] = XREGS[ap->ArityOfPE+3];
Terms[1] = XREGS[ap->ArityOfPE+4];
Terms[2] = XREGS[ap->ArityOfPE+5];
break;
case _undef_p:
return NULL;
case _lock_lu:
ipc = NEXTOP(ipc,p);
break;
case _unlock_lu:
ipc = NEXTOP(ipc,e);
break;
#if THREADS
case _thread_local:
ap = Yap_GetThreadPred(ap);
ipc = ap->CodeOfPred;
break;
#endif
case _spy_pred:
ipc = ap->cs.p_code.TrueCodeOfPred;
break;
case _index_pred:
XREGS[ap->ArityOfPE+1] = (CELL)s_reg;
XREGS[ap->ArityOfPE+2] = (CELL)t;
XREGS[ap->ArityOfPE+3] = Terms[0];
XREGS[ap->ArityOfPE+4] = Terms[1];
XREGS[ap->ArityOfPE+5] = Terms[2];
Yap_IPred(ap, 5);
start_pc = ipc = ap->cs.p_code.TrueCodeOfPred;
s_reg = (CELL *)XREGS[ap->ArityOfPE+1];
t = XREGS[ap->ArityOfPE+2];
Terms[0] = XREGS[ap->ArityOfPE+3];
Terms[1] = XREGS[ap->ArityOfPE+4];
Terms[2] = XREGS[ap->ArityOfPE+5];
break;
case _op_fail:
if (ipc == FAILCODE)
return NULL;
default:
if (b0) {
#ifdef CUT_C
{
while (POP_CHOICE_POINT(B->cp_b))
{
POP_EXECUTE();
}
}
#endif /* CUT_C */
#ifdef YAPOR
{
choiceptr cut_pt;
cut_pt = B->cp_b;
CUT_prune_to(cut_pt);
B = cut_pt;
}
#else
B = B->cp_b;
#endif /* YAPOR */
/* I did a trust */
}
if (lu_pred)
return lu_clause(ipc);
else
return (LogUpdClause *)static_clause(ipc, ap);
}
}
if (b0) {
/* I did a trust */
#ifdef CUT_C
{
while (POP_CHOICE_POINT(B->cp_b))
{
POP_EXECUTE();
}
}
#endif /* CUT_C */
#ifdef YAPOR
{
choiceptr cut_pt;
cut_pt = B->cp_b;
CUT_prune_to(cut_pt);
B = cut_pt;
}
#else
B = B->cp_b;
#endif /* YAPOR */
}
return NULL;
}
LogUpdClause *
Yap_NthClause(PredEntry *ap, Int ncls)
{
yamop
*ipc = ap->cs.p_code.TrueCodeOfPred,
*alt = NULL;
yamop **jlbl = NULL;
/* search every clause */
if (ncls == 1)
return to_clause(ap->cs.p_code.FirstClause,ap);
else if (ncls == ap->cs.p_code.NOfClauses)
return to_clause(ap->cs.p_code.LastClause,ap);
else if (ncls > ap->cs.p_code.NOfClauses)
return NULL;
else if (ncls < 0)
return NULL;
if (ap->ModuleOfPred != IDB_MODULE) {
if (ap->ArityOfPE) {
UInt i;
for (i = 1; i <= ap->ArityOfPE; i++) {
XREGS[i] = MkVarTerm();
}
}
} else {
ARG2 = MkVarTerm();
}
while (TRUE) {
op_numbers op = Yap_op_from_opcode(ipc->opc);
switch(op) {
case _try_in:
if (ncls == 1)
return to_clause(ipc->u.l.l, ap);
ncls--;
ipc = NEXTOP(ipc,l);
break;
case _retry_profiled:
case _count_retry:
ipc = NEXTOP(ipc,p);
case _try_clause:
case _retry:
if (ncls == 1)
return to_clause(ipc->u.ld.d, ap);
else if (alt == NULL) {
ncls --;
/* get there in a fell swoop */
if (ap->PredFlags & ProfiledPredFlag) {
if (ap->PredFlags & CountPredFlag) {
ipc = (yamop *)((char *)ipc+ncls*(UInt)NEXTOP(NEXTOP(NEXTOP((yamop *)NULL,ld),p),p));
} else {
ipc = (yamop *)((char *)ipc+ncls*(UInt)NEXTOP(NEXTOP((yamop *)NULL,ld),p));
}
} else if (ap->PredFlags & CountPredFlag) {
ipc = (yamop *)((char *)ipc+ncls*(UInt)NEXTOP(NEXTOP((yamop *)NULL,ld),p));
} else {
ipc = (yamop *)((char *)ipc+ncls*(UInt)NEXTOP((yamop *)NULL,ld));
}
return to_clause(ipc->u.ld.d, ap);
} else {
ncls--;
}
ipc = NEXTOP(ipc,ld);
break;
case _try_clause2:
case _try_clause3:
case _try_clause4:
case _retry2:
case _retry3:
case _retry4:
if (ncls == 1)
return to_clause(ipc->u.l.l, ap);
else if (alt == NULL) {
ncls --;
/* get there in a fell swoop */
if (ap->PredFlags & ProfiledPredFlag) {
if (ap->PredFlags & CountPredFlag) {
ipc = (yamop *)((char *)ipc+ncls*(UInt)NEXTOP(NEXTOP(NEXTOP((yamop *)NULL,l),p),p));
} else {
ipc = (yamop *)((char *)ipc+ncls*(UInt)NEXTOP(NEXTOP((yamop *)NULL,l),p));
}
} else if (ap->PredFlags & CountPredFlag) {
ipc = (yamop *)((char *)ipc+ncls*(UInt)NEXTOP(NEXTOP((yamop *)NULL,l),p));
} else {
ipc = (yamop *)((char *)ipc+ncls*(UInt)NEXTOP((yamop *)NULL,l));
}
return to_clause(ipc->u.l.l, ap);
} else {
ncls--;
}
ipc = NEXTOP(ipc,l);
break;
case _trust:
if (ncls == 1)
return to_clause(ipc->u.l.l,ap);
ncls--;
ipc = alt;
break;
case _try_me:
case _retry_me:
alt = ipc->u.ld.d;
ipc = NEXTOP(ipc,ld);
break;
case _profiled_trust_me:
case _trust_me:
case _count_trust_me:
alt = NULL;
ipc = NEXTOP(ipc,ld);
break;
case _trust_logical_pred:
ipc = NEXTOP(ipc,l);
case _stale_lu_index:
#if defined(YAPOR) || defined(THREADS)
LOCK(ap->PELock);
if (!same_lu_block(jlbl, ipc)) {
ipc = *jlbl;
UNLOCK(ap->PELock);
break;
}
#endif
while (TRUE) {
yamop *nipc = clean_up_index(ipc->u.Ill.I, jlbl, ap);
if (nipc == NULL) {
/* not enough space */
if (!Yap_growheap(FALSE, Yap_Error_Size, NULL)) {
UNLOCK(ap->PELock);
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, Yap_ErrorMessage);
return NULL;
}
} else {
UNLOCK(ap->PELock);
ipc = nipc;
break;
}
}
break;
case _enter_lu_pred:
ipc = ipc->u.Ill.l1;
break;
case _lock_lu:
ipc = NEXTOP(ipc,p);
break;
case _jump:
jlbl = &(ipc->u.l.l);
ipc = ipc->u.l.l;
break;
case _jump_if_var:
jlbl = &(ipc->u.l.l);
ipc = ipc->u.l.l;
break;
case _jump_if_nonvar:
ipc = NEXTOP(ipc,xll);
break;
/* instructions type e */
case _switch_on_type:
jlbl = &(ipc->u.llll.l4);
ipc = ipc->u.llll.l4;
break;
case _switch_list_nl:
jlbl = &(ipc->u.ollll.l4);
ipc = ipc->u.ollll.l4;
break;
case _switch_on_arg_type:
jlbl = &(ipc->u.xllll.l4);
ipc = ipc->u.xllll.l4;
break;
case _switch_on_sub_arg_type:
jlbl = &(ipc->u.sllll.l4);
ipc = ipc->u.sllll.l4;
break;
case _if_not_then:
jlbl = &(ipc->u.clll.l3);
ipc = ipc->u.clll.l3;
break;
case _expand_index:
case _expand_clauses:
#if defined(YAPOR) || defined(THREADS)
LOCK(ap->PELock);
if (*jlbl != (yamop *)&(ap->cs.p_code.ExpandCode)) {
ipc = *jlbl;
UNLOCK(ap->PELock);
break;
}
#endif
ipc = ExpandIndex(ap, 0);
UNLOCK(ap->PELock);
break;
case _op_fail:
ipc = alt;
break;
case _index_pred:
case _spy_pred:
Yap_IPred(ap, 0);
ipc = ap->cs.p_code.TrueCodeOfPred;
break;
case _undef_p:
default:
return NULL;
}
}
}
static yamop **
find_caller(PredEntry *ap, yamop *code, struct intermediates *cint) {
/* first clause */
yamop *alt = NULL;
istack_entry *stack, *sp;
/* last clause to experiment with */
yamop *ipc = ap->cs.p_code.TrueCodeOfPred;
/* labp should point at the beginning of the sequence */
yamop **labp = NULL;
Term t = TermNil, *s_reg = NULL;
int is_last_arg = TRUE;
int argno = 1;
/* this is will be used as a new PC */
CELL *top = (CELL *) TR;
UInt arity = 0;
sp = stack = (istack_entry *)top;
labelno = 1;
stack[0].pos = 0;
/* try to refine the interval using the indexing code */
while (ipc != NULL) {
op_numbers op;
op = Yap_op_from_opcode(ipc->opc);
switch(op) {
case _try_me:
case _retry_me:
case _trust_me:
case _profiled_trust_me:
case _count_trust_me:
alt = ipc->u.ld.d;
ipc = NEXTOP(ipc,ld);
break;
case _jump:
ipc = ipc->u.l.l;
break;
case _jump_if_var:
if (IsVarTerm(Deref(ARG1))) {
ipc = ipc->u.l.l;
} else {
ipc = NEXTOP(ipc,l);
}
break;
case _jump_if_nonvar:
if (!IsVarTerm(XREGS[arg_from_x(ipc->u.xll.x)])) {
ipc = ipc->u.xll.l1;
} else {
ipc = NEXTOP(ipc,xll);
}
break;
/* instructions type EC */
/* instructions type e */
case _index_dbref:
t = AbsAppl(s_reg-1);
sp[-1].val = t;
s_reg = NULL;
ipc = NEXTOP(ipc,e);
break;
case _index_blob:
t = MkIntTerm(s_reg[0]);
sp[-1].val = t;
s_reg = NULL;
ipc = NEXTOP(ipc,e);
break;
/* instructions type e */
case _switch_on_type:
t = Deref(ARG1);
argno = 1;
sp = reset_stack(stack);
if (IsVarTerm(t)) {
if (ipc->u.llll.l4 == code) return &(ipc->u.llll.l4);
ipc = ipc->u.llll.l4;
} else if (IsPairTerm(t)) {
sp = push_stack(sp, 1, AbsPair(NULL), TermNil, cint);
s_reg = RepPair(t);
labp = &(ipc->u.llll.l1);
if (ipc->u.llll.l1 == code) return &(ipc->u.llll.l1);
ipc = ipc->u.llll.l1;
} else if (IsApplTerm(t)) {
sp = push_stack(sp, 1, AbsAppl((CELL *)FunctorOfTerm(t)), TermNil, cint);
ipc = ipc->u.llll.l3;
} else {
sp = push_stack(sp, 1, t, TermNil, cint);
ipc = ipc->u.llll.l2;
}
break;
case _switch_list_nl:
t = Deref(ARG1);
sp = reset_stack(stack);
argno = 1;
if (IsVarTerm(t)) {
if (ipc->u.ollll.l4 == code) return &(ipc->u.ollll.l4);
ipc = ipc->u.ollll.l4;
} else if (IsPairTerm(t)) {
s_reg = RepPair(t);
sp = push_stack(sp, 1, AbsPair(NULL), TermNil, cint);
if (ipc->u.ollll.l1 == code)
return &(ipc->u.ollll.l1);
ipc = ipc->u.ollll.l1;
} else if (t == TermNil) {
sp = push_stack(sp, 1, t, TermNil, cint);
ipc = ipc->u.ollll.l2;
} else {
if (IsApplTerm(t)) {
sp = push_stack(sp, 1, t, AbsAppl((CELL *)FunctorOfTerm(t)), cint);
} else {
sp = push_stack(sp, 1, t, TermNil, cint);
}
ipc = ipc->u.ollll.l3;
}
break;
case _switch_on_arg_type:
argno = arg_from_x(ipc->u.xllll.x);
t = Deref(XREGS[argno]);
if (IsVarTerm(t)) {
if (ipc->u.xllll.l4 == code) return &(ipc->u.xllll.l4);
ipc = ipc->u.xllll.l4;
} else if (IsPairTerm(t)) {
s_reg = RepPair(t);
sp = push_stack(sp, argno, AbsPair(NULL), TermNil, cint);
if (ipc->u.xllll.l1 == code) return &(ipc->u.xllll.l1);
ipc = ipc->u.xllll.l1;
} else if (IsApplTerm(t)) {
sp = push_stack(sp, argno, AbsAppl((CELL *)FunctorOfTerm(t)), TermNil, cint);
ipc = ipc->u.xllll.l3;
} else {
sp = push_stack(sp, argno, t, TermNil, cint);
ipc = ipc->u.xllll.l2;
}
break;
case _switch_on_sub_arg_type:
{
COUNT argno = ipc->u.sllll.s;
t = Deref(s_reg[ipc->u.sllll.s]);
if (argno != arity-1) is_last_arg = FALSE;
t = Deref(s_reg[argno]);
if (IsVarTerm(t)) {
if (ipc->u.sllll.l4 == code) return &(ipc->u.sllll.l4);
ipc = ipc->u.sllll.l4;
} else if (IsPairTerm(t)) {
s_reg = RepPair(t);
sp = push_stack(sp, -argno-1, AbsPair(NULL), TermNil, cint);
if (ipc->u.sllll.l1 == code) return &(ipc->u.sllll.l1);
ipc = ipc->u.sllll.l1;
} else if (IsApplTerm(t)) {
sp = push_stack(sp, -argno-1, AbsAppl((CELL *)FunctorOfTerm(t)), TermNil, cint);
ipc = ipc->u.sllll.l3;
} else {
sp = push_stack(sp, -argno-1, t, TermNil, cint);
ipc = ipc->u.sllll.l2;
}
}
break;
case _if_not_then:
ipc = NULL;
break;
/* instructions type ollll */
case _switch_on_func:
case _if_func:
case _go_on_func:
{
FuncSwiEntry *fe;
yamop *newpc;
Functor f;
s_reg = RepAppl(t);
f = (Functor)(*s_reg++);
if (op == _switch_on_func) {
fe = lookup_f_hash(f,ipc->u.sssl.l,ipc->u.sssl.s);
} else {
fe = lookup_f(f,ipc->u.sssl.l,ipc->u.sssl.s);
}
newpc = (yamop *)(fe->Label);
if (newpc == code) {
/* we found it */
return (yamop **)(&(fe->Label));
} else if (newpc == FAILCODE) {
ipc = alt;
} else {
ipc = newpc;
}
}
break;
case _switch_on_cons:
case _if_cons:
case _go_on_cons:
{
AtomSwiEntry *ae;
yamop *newpc;
if (op == _switch_on_cons) {
ae = lookup_c_hash(t,ipc->u.sssl.l,ipc->u.sssl.s);
} else {
ae = lookup_c(t,ipc->u.sssl.l,ipc->u.sssl.s);
}
newpc = (yamop *)(ae->Label);
if (newpc == code) {
/* we found it */
return (yamop **)(&(ae->Label));
ipc = NULL;
} else if (newpc == FAILCODE) {
/* oops, things went wrong */
ipc = alt;
} else {
ipc = newpc;
}
}
break;
case _expand_index:
case _expand_clauses:
ipc = alt;
alt = NULL;
break;
case _op_fail:
if (alt == NULL) {
return NULL;
} else {
ipc = alt;
alt = NULL;
}
break;
case _lock_lu:
ipc = NEXTOP(ipc,p);
break;
case _stale_lu_index:
/* found myself */
return NULL;
default:
if (alt == NULL) {
Yap_Error(INTERNAL_COMPILER_ERROR,t,"unexpected instruction %d in find_caller", op);
return NULL;
} else {
ipc = alt;
}
}
}
return NULL;
}
yamop *
Yap_CleanUpIndex(LogUpdIndex *blk)
{
PredEntry *ap;
LogUpdIndex *pblk = blk;
/* first, go up until findin'your pred */
ap = pblk->ClPred;
if (
#if defined(THREADS) || defined(YAPOR)
blk->ClRefCount
#else
blk->ClFlags & InUseMask
#endif
) {
/* I have to kill this block */
yamop **caller, *new;
struct intermediates cintb;
caller = find_caller(ap, blk->ClCode, &cintb);
while (TRUE) {
new = replace_lu_block(blk, REFRESH, ap, NULL, FALSE);
/* will be null, if we are in the middle of the current block */
if (new == NULL) {
if (!Yap_growheap(FALSE, Yap_Error_Size, NULL)) {
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, Yap_ErrorMessage);
return FAILCODE;
}
}
if (caller) {
*caller = new;
}
return new;
}
} else {
/* just compact the code */
yamop *start = blk->ClCode, *codep;
op_numbers op = Yap_op_from_opcode(start->opc);
while (op == _jump_if_nonvar) {
start = NEXTOP(start, xll);
op = Yap_op_from_opcode(start->opc);
}
codep = start->u.Ill.l1;
start->opc = Yap_opcode(_enter_lu_pred);
start->u.Ill.l2 = cp_lu_trychain(codep, codep, start, REFRESH, ap, NULL, FALSE, blk, start->u.Ill.s, 0);
return start;
}
}
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