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yap-6.3/C/computils.c
vsc b289d9ac9c new module system. BEWARE! BEWARE! BEWARE! 
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@177 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2001-11-15 00:01:43 +00:00

663 lines
14 KiB
C
Raw Blame History

/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: computils.c *
* Last rev: *
* mods: *
* comments: some useful routines for YAP's compiler *
* *
*************************************************************************/
#ifdef SCCS
static char SccsId[] = "%W% %G%";
#endif
/*
* This file includes a set of utilities, useful to the several compilation
* modules
*/
#include "Yap.h"
#include "Yatom.h"
#include "Heap.h"
#include "compile.h"
#include "yapio.h"
#if HAVE_STRING_H
#include <string.h>
#endif
#ifdef DEBUG
STATIC_PROTO (void ShowOp, (char *));
#endif /* DEBUG */
/*
* The compiler creates an instruction chain which will be assembled after
* afterwards
*/
char *freep, *freep0;
Int arg, rn;
compiler_vm_op ic;
CELL *cptr;
char *
AllocCMem (int size)
{
char *p;
p = freep;
#if SIZEOF_INT_P==8
size = (size + 7) & 0xfffffffffffffff8L;
#else
size = (size + 3) & 0xfffffffcL;
#endif
freep += size;
if (ASP <= CellPtr (freep) + 256) {
save_machine_regs();
longjmp(CompilerBotch,3);
}
return (p);
}
int
is_a_test_pred (Term arg, SMALLUNSGN mod)
{
if (IsVarTerm (arg))
return (FALSE);
else if (IsAtomTerm (arg))
{
Atom At = AtomOfTerm (arg);
PredEntry *pe = RepPredProp(PredPropByAtom(At, mod));
if (EndOfPAEntr(pe))
return (FALSE);
return (pe->PredFlags & TestPredFlag);
}
else if (IsApplTerm (arg))
{
Functor f = FunctorOfTerm (arg);
PredEntry *pe = RepPredProp(PredPropByFunc(f, mod));
if (EndOfPAEntr(pe))
return (FALSE);
return (pe->PredFlags & TestPredFlag);
}
else
return (FALSE);
}
void
emit (compiler_vm_op o, Int r1, CELL r2)
{
PInstr *p;
p = (PInstr *) AllocCMem (sizeof (*p));
p->op = o;
p->rnd1 = r1;
p->rnd2 = r2;
p->nextInst = NIL;
if (cpc == NIL)
cpc = CodeStart = p;
else
{
cpc->nextInst = p;
cpc = p;
}
}
void
emit_3ops (compiler_vm_op o, CELL r1, CELL r2, CELL r3)
{
PInstr *p;
p = (PInstr *) AllocCMem (sizeof (*p)+sizeof(CELL));
p->op = o;
p->rnd1 = r1;
p->rnd2 = r2;
p->rnd3 = r3;
p->nextInst = NIL;
if (cpc == NIL)
cpc = CodeStart = p;
else
{
cpc->nextInst = p;
cpc = p;
}
}
CELL *
emit_extra_size (compiler_vm_op o, CELL r1, int size)
{
PInstr *p;
p = (PInstr *) AllocCMem (sizeof (*p) + size - CellSize);
p->op = o;
p->rnd1 = r1;
p->nextInst = NIL;
if (cpc == NIL)
cpc = CodeStart = p;
else
{
cpc->nextInst = p;
cpc = p;
}
return (p->arnds);
}
void
bip_name(Int op, char *s)
{
switch (op) {
case _atom:
strcpy(s,"atom");
break;
case _atomic:
strcpy(s,"atomic");
break;
case _integer:
strcpy(s,"integer");
break;
case _nonvar:
strcpy(s,"nonvar");
break;
case _number:
strcpy(s,"number");
break;
case _var:
strcpy(s,"var");
break;
case _cut_by:
strcpy(s,"cut_by");
break;
case _db_ref:
strcpy(s,"db_ref");
break;
case _compound:
strcpy(s,"compound");
break;
case _float:
strcpy(s,"float");
break;
case _primitive:
strcpy(s,"primitive");
break;
case _equal:
strcpy(s,"equal");
break;
case _dif:
strcpy(s,"dif");
break;
case _eq:
strcpy(s,"eq");
break;
case _functor:
strcpy(s,"functor");
break;
case _plus:
strcpy(s,"plus");
break;
case _minus:
strcpy(s,"minus");
break;
case _times:
strcpy(s,"times");
break;
case _div:
strcpy(s,"div");
break;
case _and:
strcpy(s,"and");
break;
case _or:
strcpy(s,"or");
break;
case _sll:
strcpy(s,"sll");
break;
case _slr:
strcpy(s,"slr");
break;
case _arg:
strcpy(s,"arg");
break;
default:
strcpy(s,"");
break;
}
}
#ifdef DEBUG
static void
ShowOp (f)
char *f;
{
char ch;
while ((ch = *f++) != 0)
{
if (ch == '%')
switch (ch = *f++)
{
case 'a':
case 'n':
plwrite ((Term) arg, DebugPutc, 0);
break;
case 'b':
/* write a variable bitmap for a call */
{
int max = arg/(8*sizeof(CELL)), i;
CELL *ptr = cptr;
for (i = 0; i <= max; i++) {
plwrite(MkIntegerTerm((Int)(*ptr++)), DebugPutc, 0);
}
}
break;
case 'l':
plwrite (MkIntTerm (arg), DebugPutc, 0);
break;
case 'B':
{
char s[32];
bip_name(rn,s);
plwrite (MkAtomTerm(LookupAtom(s)), DebugPutc, 0);
}
break;
case 'd':
plwrite (MkIntTerm (rn), DebugPutc, 0);
break;
case 'z':
plwrite (MkIntTerm (cpc->rnd3), DebugPutc, 0);
break;
case 'v':
{
Ventry *v = (Ventry *) arg;
DebugPutc (c_output_stream,v->KindOfVE == PermVar ? 'Y' : 'X');
plwrite (MkIntTerm ((v->NoOfVE) & MaskVarAdrs), DebugPutc, 0);
}
break;
case 'N':
{
Ventry *v;
cpc = cpc->nextInst;
arg = cpc->rnd1;
v = (Ventry *) arg;
DebugPutc (c_output_stream,v->KindOfVE == PermVar ? 'Y' : 'X');
plwrite (MkIntTerm ((v->NoOfVE) & MaskVarAdrs), DebugPutc, 0);
}
break;
case 'm':
plwrite (MkAtomTerm ((Atom) arg), DebugPutc, 0);
DebugPutc (c_output_stream,'/');
plwrite (MkIntTerm (rn), DebugPutc, 0);
break;
case 'p':
{
PredEntry *p = RepPredProp ((Prop) arg);
Functor f = p->FunctorOfPred;
UInt arity = p->ArityOfPE;
SMALLUNSGN mod = 0;
if (p->ModuleOfPred) mod = IntOfTerm(p->ModuleOfPred);
plwrite (ModuleName[mod], DebugPutc, 0);
DebugPutc (c_output_stream,':');
if (arity == 0)
plwrite (MkAtomTerm ((Atom)f), DebugPutc, 0);
else
plwrite (MkAtomTerm (NameOfFunctor (f)), DebugPutc, 0);
DebugPutc (c_output_stream,'/');
plwrite (MkIntTerm (arity), DebugPutc, 0);
}
break;
case 'P':
{
PredEntry *p = RepPredProp((Prop) rn);
Functor f = p->FunctorOfPred;
UInt arity = p->ArityOfPE;
SMALLUNSGN mod = 0;
if (p->ModuleOfPred) mod = IntOfTerm(p->ModuleOfPred);
plwrite (ModuleName[mod], DebugPutc, 0);
DebugPutc (c_output_stream,':');
if (arity == 0)
plwrite (MkAtomTerm ((Atom)f), DebugPutc, 0);
else
plwrite (MkAtomTerm (NameOfFunctor (f)), DebugPutc, 0);
DebugPutc (c_output_stream,'/');
plwrite (MkIntTerm (arity), DebugPutc, 0);
}
break;
case 'f':
if (IsExtensionFunctor((Functor)arg)) {
if ((Functor)arg == FunctorDBRef) {
plwrite(MkAtomTerm(LookupAtom("DBRef")), DebugPutc, 0);
} else if ((Functor)arg == FunctorLongInt) {
plwrite(MkAtomTerm(LookupAtom("LongInt")), DebugPutc, 0);
} else if ((Functor)arg == FunctorDouble) {
plwrite(MkAtomTerm(LookupAtom("Double")), DebugPutc, 0);
}
} else {
plwrite(MkAtomTerm(NameOfFunctor ((Functor) arg)), DebugPutc, 0);
DebugPutc (c_output_stream,'/');
plwrite(MkIntTerm(ArityOfFunctor ((Functor) arg)), DebugPutc, 0);
}
break;
case 'r':
DebugPutc (c_output_stream,'A');
plwrite (MkIntTerm (rn), DebugPutc, 0);
break;
case 'h':
{
CELL my_arg = *cptr++;
if (my_arg & 1)
plwrite (MkIntTerm (my_arg),
DebugPutc, 0);
else if (my_arg == (CELL) FAILCODE)
plwrite (MkAtomTerm (AtomFail), DebugPutc, 0);
else
plwrite (MkIntegerTerm ((Int) my_arg),
DebugPutc, 0);
}
break;
case 'g':
if (arg & 1)
plwrite (MkIntTerm (arg),
DebugPutc, 0);
else if (arg == (CELL) FAILCODE)
plwrite (MkAtomTerm (AtomFail), DebugPutc, 0);
else
plwrite (MkIntegerTerm ((Int) arg), DebugPutc, 0);
break;
case 'i':
plwrite (MkIntTerm (arg), DebugPutc, 0);
break;
case 'j':
{
Functor fun = (Functor)*cptr++;
if (IsExtensionFunctor(fun)) {
if (fun == FunctorDBRef) {
plwrite(MkAtomTerm(LookupAtom("DBRef")), DebugPutc, 0);
} else if (fun == FunctorLongInt) {
plwrite(MkAtomTerm(LookupAtom("LongInt")), DebugPutc, 0);
} else if (fun == FunctorDouble) {
plwrite(MkAtomTerm(LookupAtom("Double")), DebugPutc, 0);
}
} else {
plwrite (MkAtomTerm(NameOfFunctor(fun)), DebugPutc, 0);
DebugPutc (c_output_stream,'/');
plwrite (MkIntTerm(ArityOfFunctor(fun)), DebugPutc, 0);
}
}
break;
case 'O':
plwrite(AbsAppl(cptr), DebugPutc, 0);
break;
case 'x':
plwrite (MkIntTerm (rn >> 1), DebugPutc, 0);
DebugPutc (c_output_stream,'\t');
plwrite (MkIntTerm (rn & 1), DebugPutc, 0);
break;
case 'o':
plwrite ((Term) * cptr++, DebugPutc, 0);
case 'c':
{
int i;
for (i = 0; i < arg; ++i)
{
CELL my_arg;
if (*cptr)
{
plwrite ((Term) * cptr++, DebugPutc, 0);
}
else
{
plwrite (MkIntTerm (0), DebugPutc, 0);
cptr++;
}
DebugPutc (c_output_stream,'\t');
my_arg = *cptr++;
if (my_arg & 1)
plwrite (MkIntTerm (my_arg),
DebugPutc, 0);
else if (my_arg == (CELL) FAILCODE)
plwrite (MkAtomTerm (AtomFail), DebugPutc, 0);
else
plwrite (MkIntegerTerm ((Int) my_arg), DebugPutc, 0);
DebugPutc (c_output_stream,'\n');
}
}
break;
case 'e':
{
int i;
for (i = 0; i < arg; ++i)
{
CELL my_arg;
if (*cptr)
{
plwrite (MkAtomTerm (NameOfFunctor ((Functor) * cptr)), DebugPutc, 0);
DebugPutc (c_output_stream,'/');
plwrite (MkIntTerm (ArityOfFunctor ((Functor) * cptr++)), DebugPutc, 0);
}
else
{
plwrite (MkIntTerm (0), DebugPutc, 0);
cptr++;
}
DebugPutc (c_output_stream,'\t');
my_arg = *cptr++;
if (my_arg & 1)
plwrite (MkIntTerm (my_arg),
DebugPutc, 0);
else if (my_arg == (CELL) FAILCODE)
plwrite (MkAtomTerm (AtomFail), DebugPutc, 0);
else
plwrite (MkIntegerTerm ((Int) my_arg), DebugPutc, 0);
DebugPutc (c_output_stream,'\n');
}
}
break;
default:
DebugPutc (c_output_stream,'%');
DebugPutc (c_output_stream,ch);
}
else
DebugPutc (c_output_stream,ch);
}
DebugPutc (c_output_stream,'\n');
}
static char *opformat[] =
{
"nop",
"get_var\t\t%v,%r",
"put_var\t\t%v,%r",
"get_val\t\t%v,%r",
"put_val\t\t%v,%r",
"get_atom\t%a,%r",
"put_atom\t%a,%r",
"get_num\t\t%n,%r",
"put_num\t\t%n,%r",
"get_float\t\t%l,%r",
"put_float\t\t%l,%r",
"get_longint\t\t%l,%r",
"put_longint\t\t%l,%r",
"get_bigint\t\t%l,%r",
"put_bigint\t\t%l,%r",
"get_list\t%r",
"put_list\t%r",
"get_struct\t%f,%r",
"put_struct\t%f,%r",
"put_unsafe\t%v,%r",
"unify_var\t%v",
"write_var\t%v",
"unify_val\t%v",
"write_val\t%v",
"unify_atom\t%a",
"write_atom\t%a",
"unify_num\t%n",
"write_num\t%n",
"unify_float\t%l",
"write_float\t%l",
"unify_longint\t%l",
"write_longint\t%l",
"unify_bigint\t%l",
"write_bigint\t%l",
"unify_list",
"write_list",
"unify_struct\t%f",
"write_struct\t%f",
"write_unsafe\t%v",
"fail",
"cut",
"cutexit",
"allocate",
"deallocate",
"try_me_else\t\t%l\t%x",
"jump\t\t%l",
"procceed",
"call\t\t%p,%d,%z",
"execute\t\t%p",
"sys\t\t%p",
"%l:",
"name\t\t%m,%d",
"pop\t\t%l",
"retry_me_else\t\t%l\t%x",
"trust_me_else_fail\t%x",
"either_me\t\t%l,%d,%z",
"or_else\t\t%l,%z",
"or_last",
"push_or",
"pushpop_or",
"pop_or",
"save_by\t\t%v",
"comit_by\t\t%v",
"patch_by\t\t%v",
"try\t\t%g\t%x",
"retry\t\t%g\t%x",
"trust\t\t%g\t%x",
"try_in\t\t%g\t%x",
"retry_in\t\t%g\t%x",
"trust_in\t\t%g\t%x",
"try_first\t\t%g\t%x",
"retry_first\t\t%g\t%x",
"trust_first\t\t%g\t%x",
"try_first in\t\t%g\t%x",
"retry_first in\t\t%g\t%x",
"trust_first in\t\t%g\t%x",
"try_tail\t\t%g\t%x",
"retry_tail\t\t%g\t%x",
"trust_tail\t\t%g\t%x",
"try_tail_in\t\t%g\t%x",
"retry_tail_in\t\t%g\t%x",
"trust_tail_in\t\t%g\t%x",
"try_head\t\t%g\t%x",
"retry_head\t\t%g\t%x",
"trust_head\t\t%g\t%x",
"try_head_in\t\t%g\t%x",
"retry_head_in\t\t%g\t%x",
"trust_head_in\t\t%g\t%x",
"try_last_first\t\t%g\t%x",
"try_last_head\t\t%g\t%x",
"jump_if_var\t\t%g",
"switch_on_type\t%h\t%h\t%h\t%h",
"switch_on_type_if_nonvar\t%h\t%h\t%h",
"switch_on_type_of_last\t%h\t%h\t%h",
"switch_on_type_of_head\t%h\t%h\t%h\t%h",
"switch_on_list_or_nil\t%h\t%h\t%h\t%h",
"switch_if_list_or_nil\t%h\t%h\t%h",
"switch_on_last_list_or_nil\t%h\t%h\t%h",
"switch_on_constant\t%i\n%c",
"if_a_constant\t%i\t%h\n%c",
"go_if_ equals_constant\t%o\t%h\t%h",
"switch_on_functor\t%i\n%e",
"if_a_functor\t%i\t%h\n%e",
"go_if_equals_functor\t%j\t%h\t%h",
"if_not_then\t%i\t%h\t%h\t%h",
"save_pair\t%v",
"save_appl\t%v",
"fail_label\t%l",
"unify_local\t%v",
"write local\t%v",
"unify_last_list",
"write_last_list",
"unify_last_struct\t%f",
"write_last_struct\t%f",
"unify_last_var\t%v",
"unify_last_val\t%v",
"unify_last_local\t%v",
"unify_last_atom\t%a",
"unify_last_num\t%n",
"unify_last_float\t%l",
"unify_last_longint\t%l",
"unify_last_bigint\t%l",
"pvar_bitmap\t%l,%b",
"pvar_live_regs\t%l,%b",
"fetch_reg1_reg2\t%N,%N",
"fetch_constant_reg\t%l,%N",
"fetch_reg_constant\t%l,%N",
"function_to_var\t%v,%B",
"function_to_al\t%v,%B",
"enter_profiling\t\t%g",
"retry_profiled\t\t%g",
"restore_temps\t\t%l",
"restore_temps_and_skip\t\t%l",
"empty_call\t\t%l,%d",
#ifdef TABLING
"table_new_answer",
#endif /* TABLING */
#ifdef YAPOR
"sync",
#endif /* YAPOR */
"fetch_args_for_bccall\t%v",
"binary_cfunc\t\t%v,%P",
"blob\t%O"
#ifdef SFUNC
,
"get_s_f_op\t%f,%r",
"put_s_f_op\t%f,%r",
"unify_s_f_op\t%f",
"write_s_f_op\t%f",
"unify_s_var\t%v,%r",
"write_s_var\t%v,%r",
"unify_s_val\t%v,%r",
"write_s_val\t%v,%r",
"unify_s_a\t%a,%r",
"write_s_a\t%a,%r",
"get_s_end",
"put_s_end",
"unify_s_end",
"write_s_end"
#endif
};
void
ShowCode ()
{
CELL *OldH = H;
cpc = CodeStart;
/* MkIntTerm and friends may build terms in the global stack */
H = (CELL *)freep;
while (cpc)
{
ic = cpc->op;
arg = cpc->rnd1;
rn = cpc->rnd2;
cptr = cpc->arnds;
if (ic != nop_op)
ShowOp (opformat[ic]);
cpc = cpc->nextInst;
}
DebugPutc (c_output_stream,'\n');
H = OldH;
}
#endif /* DEBUG */
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