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yap-6.3/C/exec.c
2004-02-11 13:33:19 +00:00

1632 lines
39 KiB
C

/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: exec.c *
* Last rev: 8/2/88 *
* mods: *
* comments: Execute Prolog code *
* *
*************************************************************************/
#ifdef SCCS
static char SccsId[] = "@(#)cdmgr.c 1.1 05/02/98";
#endif
#include "absmi.h"
#include "yapio.h"
STATIC_PROTO(Int CallPredicate, (PredEntry *, choiceptr));
STATIC_PROTO(Int EnterCreepMode, (Term, SMALLUNSGN));
STATIC_PROTO(Int CallClause, (PredEntry *, Int));
STATIC_PROTO(Int p_save_cp, (void));
STATIC_PROTO(Int p_execute, (void));
STATIC_PROTO(Int p_execute0, (void));
STATIC_PROTO(Int p_at_execute, (void));
static Term
cp_as_integer(choiceptr cp)
{
return(MkIntTerm(LCL0-(CELL *)cp));
}
Term
Yap_cp_as_integer(choiceptr cp)
{
return cp_as_integer(cp);
}
static inline Int
CallPredicate(PredEntry *pen, choiceptr cut_pt) {
#ifdef LOW_LEVEL_TRACER
if (Yap_do_low_level_trace)
low_level_trace(enter_pred,pen,XREGS+1);
#endif /* LOW_LEVEL_TRACE */
READ_LOCK(pen->PRWLock);
#ifdef DEPTH_LIMIT
if (DEPTH <= MkIntTerm(1)) {/* I assume Module==0 is prolog */
if (pen->ModuleOfPred) {
if (DEPTH == MkIntTerm(0))
return FALSE;
else DEPTH = RESET_DEPTH();
}
} else if (pen->ModuleOfPred)
DEPTH -= MkIntConstant(2);
#endif /* DEPTH_LIMIT */
CP = P;
P = pen->CodeOfPred;
/* vsc: increment reduction counter at meta-call entry */
READ_UNLOCK(pen->PRWLock);
if (pen->PredFlags & ProfiledPredFlag) {
LOCK(pen->StatisticsForPred.lock);
pen->StatisticsForPred.NOfEntries++;
UNLOCK(pen->StatisticsForPred.lock);
}
ENV = YENV;
YENV = ASP;
YENV[E_CB] = (CELL) cut_pt;
return (TRUE);
}
inline static Int
CallMetaCall(SMALLUNSGN mod) {
ARG2 = cp_as_integer(B); /* p_save_cp */
ARG3 = ARG1;
ARG4 = ModuleName[mod];
return (CallPredicate(PredMetaCall, B));
}
Term
Yap_ExecuteCallMetaCall(SMALLUNSGN mod) {
Term ts[4];
ts[0] = ARG1;
ts[1] = cp_as_integer(B); /* p_save_cp */
ts[2] = ARG1;
ts[3] = ModuleName[mod];
return(Yap_MkApplTerm(PredMetaCall->FunctorOfPred,4,ts));
}
static Int
CallError(yap_error_number err, SMALLUNSGN mod)
{
if (yap_flags[LANGUAGE_MODE_FLAG] == 1) {
return(CallMetaCall(mod));
} else {
Yap_Error(err, ARG1, "call/1");
return(FALSE);
}
}
static Int
CallClause(PredEntry *pen, Int position)
{
CELL flags;
if (position == -1) return(CallPredicate(pen, B));
READ_LOCK(pen->PRWLock);
flags = pen->PredFlags;
if ((flags & (CompiledPredFlag | DynamicPredFlag)) ||
pen->OpcodeOfPred == UNDEF_OPCODE) {
yamop *q;
#ifdef DEPTH_LIMIT
if (DEPTH <= MkIntTerm(1)) {/* I assume Module==0 is prolog */
if (pen->ModuleOfPred) {
if (DEPTH == MkIntTerm(0))
return(FALSE);
else DEPTH = RESET_DEPTH();
}
} else if (pen->ModuleOfPred)
DEPTH -= MkIntConstant(2);
#endif /* DEPTH_LIMIT */
#ifdef LOW_LEVEL_TRACER
if (Yap_do_low_level_trace)
low_level_trace(enter_pred,pen,XREGS+1);
#endif /* LOW_LEVEL_TRACE */
ENV = YENV;
YENV = ASP;
YENV[E_CB] = (CELL)(B->cp_b);
CP = P;
q = pen->cs.p_code.FirstClause;
if (pen->PredFlags & ProfiledPredFlag) {
LOCK(pen->StatisticsForPred.lock);
if (position == 1)
pen->StatisticsForPred.NOfEntries++;
else
pen->StatisticsForPred.NOfRetries++;
UNLOCK(pen->StatisticsForPred.lock);
}
if (flags & DynamicPredFlag) {
CLAUSECODE->arity = pen->ArityOfPE;
CLAUSECODE->func = pen->FunctorOfPred;
while (position > 1) {
while (ClauseCodeToDynamicClause(q)->ClFlags & ErasedMask)
q = NextDynamicClause(q);
position--;
q = NextDynamicClause(q);
}
while (ClauseCodeToDynamicClause(q)->ClFlags & ErasedMask)
q = NextDynamicClause(q);
#if defined(YAPOR) || defined(THREADS)
{
DynamicClause *cl = ClauseCodeToDynamicClause(q);
LOCK(cl->ClLock);
TRAIL_CLREF(cl);
INC_CLREF_COUNT(cl);
UNLOCK(cl->ClLock);
}
#else
if (!(ClauseCodeToDynamicClause(q)->ClFlags & InUseMask)) {
CELL *opp = &(ClauseCodeToDynamicClause(q)->ClFlags);
TRAIL_CLREF(ClauseCodeToDynamicClause(q));
*opp |= InUseMask;
}
#endif
READ_UNLOCK(pen->PRWLock);
CLAUSECODE->clause = NEXTOP(q,ld);
P = CLAUSECODE->clause;
return((CELL)(&(CLAUSECODE->clause)));
} else if (flags & LogUpdatePredFlag) {
LogUpdClause *cl = ClauseCodeToLogUpdClause(q);
for (; position > 1; position--)
cl = cl->ClNext;
READ_UNLOCK(pen->PRWLock);
P = cl->ClCode;
return (Unsigned(pen));
} else {
/* static clause */
LogUpdClause *cl = ClauseCodeToLogUpdClause(q);
for (; position > 1; position--)
cl = cl->ClNext;
READ_UNLOCK(pen->PRWLock);
P = cl->ClCode;
return (Unsigned(pen));
}
} else {
Yap_Error(SYSTEM_ERROR,ARG1,"debugger tries to debug clause for builtin");
return (FALSE);
}
}
static Int
p_save_cp(void)
{
Term t = Deref(ARG1);
Term td;
#if SHADOW_HB
register CELL *HBREG = HB;
#endif
if (!IsVarTerm(t)) return(FALSE);
td = cp_as_integer(B);
BIND((CELL *)t,td,bind_save_cp);
#ifdef COROUTINING
DO_TRAIL(CellPtr(t), td);
if (CellPtr(t) < H0) Yap_WakeUp((CELL *)t);
bind_save_cp:
#endif
return(TRUE);
}
inline static Int
do_execute(Term t, SMALLUNSGN mod)
{
if (ActiveSignals) {
return(EnterCreepMode(t, mod));
} else if (PRED_GOAL_EXPANSION_ON) {
return(CallMetaCall(mod));
}
restart_exec:
if (IsVarTerm(t)) {
return CallError(INSTANTIATION_ERROR, mod);
} else if (IsApplTerm(t)) {
register Functor f = FunctorOfTerm(t);
register CELL *pt;
PredEntry *pen;
unsigned int i, arity;
f = FunctorOfTerm(t);
if (IsExtensionFunctor(f)) {
return CallError(TYPE_ERROR_CALLABLE, mod);
}
arity = ArityOfFunctor(f);
pen = RepPredProp(PredPropByFunc(f, mod));
/* You thought we would be over by now */
/* but no meta calls require special preprocessing */
if (pen->PredFlags & MetaPredFlag) {
if (f == FunctorModule) {
Term tmod = ArgOfTerm(1,t);
if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
mod = Yap_LookupModule(tmod);
t = ArgOfTerm(2,t);
goto restart_exec;
}
} else {
return(CallMetaCall(mod));
}
}
/* now let us do what we wanted to do from the beginning !! */
/* I cannot use the standard macro here because
otherwise I would dereference the argument and
might skip a svar */
pt = RepAppl(t)+1;
for (i = 1; i <= arity; i++) {
#if SBA
Term d0 = *pt++;
if (d0 == 0)
` XREGS[i] = (CELL)(pt-1);
else
XREGS[i] = d0;
#else
XREGS[i] = *pt++;
#endif
}
return (CallPredicate(pen, B));
} else if (IsAtomTerm(t)) {
PredEntry *pe;
Atom a = AtomOfTerm(t);
if (a == AtomTrue || a == AtomOtherwise || a == AtomCut)
return(TRUE);
else if (a == AtomFail || a == AtomFalse)
return(FALSE);
/* call may not define new system predicates!! */
pe = RepPredProp(PredPropByAtom(a, mod));
return (CallPredicate(pe, B));
} else if (IsIntTerm(t)) {
return CallError(TYPE_ERROR_CALLABLE, mod);
} else {
/* Is Pair Term */
return(CallMetaCall(mod));
}
}
static Int
EnterCreepMode(Term t, SMALLUNSGN mod) {
PredEntry *PredCreep;
if (ActiveSignals & YAP_CDOVF_SIGNAL) {
ARG1 = t;
if (!Yap_growheap(FALSE, 0, NULL)) {
Yap_Error(FATAL_ERROR, TermNil, "YAP failed to grow heap at meta-call");
}
if (!ActiveSignals) {
return do_execute(ARG1, mod);
}
}
PredCreep = RepPredProp(PredPropByFunc(FunctorCreep,1));
ARG1 = MkPairTerm(ModuleName[mod],ARG1);
LOCK(SignalLock);
CreepFlag = CalculateStackGap();
UNLOCK(SignalLock);
P_before_spy = P;
return (CallPredicate(PredCreep, B));
}
static Int
p_execute(void)
{ /* '$execute'(Goal) */
Term t = Deref(ARG1);
return(do_execute(t, CurrentModule));
}
static Int
p_execute_in_mod(void)
{ /* '$execute'(Goal) */
return(do_execute(Deref(ARG1), IntOfTerm(Deref(ARG2))));
}
static Int
p_execute0(void)
{ /* '$execute0'(Goal,Mod) */
Term t = Deref(ARG1);
Term tmod = Deref(ARG2);
unsigned int arity;
Prop pe;
SMALLUNSGN mod = Yap_LookupModule(tmod);
restart_exec:
if (IsVarTerm(t)) {
Yap_Error(INSTANTIATION_ERROR,ARG3,"call/1");
return(FALSE);
} else if (IsAtomTerm(t)) {
Atom a = AtomOfTerm(t);
pe = PredPropByAtom(a, mod);
} else if (IsApplTerm(t)) {
register Functor f = FunctorOfTerm(t);
register unsigned int i;
register CELL *pt;
if (IsExtensionFunctor(f))
return(FALSE);
if (f == FunctorModule) {
Term tmod = ArgOfTerm(1,t);
if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
mod = Yap_LookupModule(tmod);
t = ArgOfTerm(2,t);
goto restart_exec;
}
}
pe = PredPropByFunc(f, mod);
arity = ArityOfFunctor(f);
/* I cannot use the standard macro here because
otherwise I would dereference the argument and
might skip a svar */
pt = RepAppl(t)+1;
for (i = 1; i <= arity; ++i) {
#if SBA
Term d0 = *pt++;
if (d0 == 0)
XREGS[i] = (CELL)(pt-1);
else
XREGS[i] = d0;
#else
XREGS[i] = *pt++;
#endif
}
} else {
Yap_Error(TYPE_ERROR_CALLABLE,ARG3,"call/1");
return(FALSE);
}
/* N = arity; */
/* call may not define new system predicates!! */
return (CallPredicate(RepPredProp(pe), B));
}
static Int
p_execute_0(void)
{ /* '$execute_0'(Goal) */
Term t = Deref(ARG1);
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG2));
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
pe = PredPropByAtom(a, mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/1");
return(FALSE);
}
pe = PredPropByFunc(f, mod);
Arity = ArityOfFunctor(f);
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,2), mod);
ptr = RepPair(t);
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B));
}
static Int
p_execute_1(void)
{ /* '$execute_0'(Goal) */
Term t = Deref(ARG1);
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG3));
Prop pe;
if (!IsAtomTerm(t)) {
Yap_Error(TYPE_ERROR_ATOM,ARG1,"call_with_args/2");
return(FALSE);
}
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
pe = PredPropByFunc(Yap_MkFunctor(a,1),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/2");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+1), mod);
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,3), mod);
ptr = RepPair(t);
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B));
}
static Int
p_execute_2(void)
{ /* '$execute_2'(Goal) */
Term t = Deref(ARG1);
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG4));
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
pe = PredPropByFunc(Yap_MkFunctor(a,2),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/3");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+2), mod);
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,4), mod);
ptr = RepPair(t);
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B));
}
static Int
p_execute_3(void)
{ /* '$execute_3'(Goal) */
Term t = Deref(ARG1);
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG5));
Prop pe;
if (!IsAtomTerm(t)) {
Yap_Error(TYPE_ERROR_ATOM,ARG1,"call_with_args/4");
return(FALSE);
}
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
ARG3 = ARG4;
pe = PredPropByFunc(Yap_MkFunctor(a,3),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/2");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+3), mod);
XREGS[Arity+3] = ARG4;
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,5), mod);
ptr = RepPair(t);
XREGS[5] = ARG4;
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B));
}
static Int
p_execute_4(void)
{ /* '$execute_4'(Goal) */
Term t = Deref(ARG1);
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG6));
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
ARG3 = ARG4;
ARG4 = ARG5;
pe = PredPropByFunc(Yap_MkFunctor(a,4),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/5");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+4), mod);
XREGS[Arity+4] = ARG5;
XREGS[Arity+3] = ARG4;
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,6), mod);
ptr = RepPair(t);
XREGS[6] = ARG5;
XREGS[5] = ARG4;
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B));
}
static Int
p_execute_5(void)
{ /* '$execute_5'(Goal) */
Term t = Deref(ARG1);
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG7));
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
ARG3 = ARG4;
ARG4 = ARG5;
ARG5 = ARG6;
pe = PredPropByFunc(Yap_MkFunctor(a,5),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/6");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+5), mod);
XREGS[Arity+5] = ARG6;
XREGS[Arity+4] = ARG5;
XREGS[Arity+3] = ARG4;
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,7), mod);
ptr = RepPair(t);
XREGS[7] = ARG6;
XREGS[6] = ARG5;
XREGS[5] = ARG4;
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B));
}
static Int
p_execute_6(void)
{ /* '$execute_6'(Goal) */
Term t = Deref(ARG1);
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG8));
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
ARG3 = ARG4;
ARG4 = ARG5;
ARG5 = ARG6;
ARG6 = ARG7;
pe = PredPropByFunc(Yap_MkFunctor(a,6),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/7");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+6), mod);
XREGS[Arity+6] = ARG7;
XREGS[Arity+5] = ARG6;
XREGS[Arity+4] = ARG5;
XREGS[Arity+3] = ARG4;
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,8), mod);
ptr = RepPair(t);
XREGS[8] = ARG7;
XREGS[7] = ARG6;
XREGS[6] = ARG5;
XREGS[5] = ARG4;
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B));
}
static Int
p_execute_7(void)
{ /* '$execute_7'(Goal) */
Term t = Deref(ARG1);
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG9));
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
ARG3 = ARG4;
ARG4 = ARG5;
ARG5 = ARG6;
ARG6 = ARG7;
ARG7 = ARG8;
pe = PredPropByFunc(Yap_MkFunctor(a,7),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/8");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+7), mod);
XREGS[Arity+7] = ARG8;
XREGS[Arity+6] = ARG7;
XREGS[Arity+5] = ARG6;
XREGS[Arity+4] = ARG5;
XREGS[Arity+3] = ARG4;
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,9), mod);
ptr = RepPair(t);
XREGS[9] = ARG8;
XREGS[8] = ARG7;
XREGS[7] = ARG6;
XREGS[6] = ARG5;
XREGS[5] = ARG4;
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B));
}
static Int
p_execute_8(void)
{ /* '$execute_8'(Goal) */
Term t = Deref(ARG1);
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG10));
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
ARG3 = ARG4;
ARG4 = ARG5;
ARG5 = ARG6;
ARG6 = ARG7;
ARG7 = ARG8;
ARG8 = ARG9;
pe = PredPropByFunc(Yap_MkFunctor(a,8),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/9");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+8), mod);
XREGS[Arity+8] = ARG9;
XREGS[Arity+7] = ARG8;
XREGS[Arity+6] = ARG7;
XREGS[Arity+5] = ARG6;
XREGS[Arity+4] = ARG5;
XREGS[Arity+3] = ARG4;
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,10), mod);
ptr = RepPair(t);
XREGS[10] = ARG9;
XREGS[9] = ARG8;
XREGS[8] = ARG7;
XREGS[7] = ARG6;
XREGS[6] = ARG5;
XREGS[5] = ARG4;
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B));
}
static Int
p_execute_9(void)
{ /* '$execute_9'(Goal) */
Term t = Deref(ARG1);
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG11));
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
ARG3 = ARG4;
ARG4 = ARG5;
ARG5 = ARG6;
ARG6 = ARG7;
ARG7 = ARG8;
ARG8 = ARG9;
ARG9 = ARG10;
pe = PredPropByFunc(Yap_MkFunctor(a,9),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/10");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+9), mod);
XREGS[Arity+9] = ARG10;
XREGS[Arity+8] = ARG9;
XREGS[Arity+7] = ARG8;
XREGS[Arity+6] = ARG7;
XREGS[Arity+5] = ARG6;
XREGS[Arity+4] = ARG5;
XREGS[Arity+3] = ARG4;
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,11), mod);
ptr = RepPair(t);
XREGS[11] = ARG10;
XREGS[10] = ARG9;
XREGS[9] = ARG8;
XREGS[8] = ARG7;
XREGS[7] = ARG6;
XREGS[6] = ARG5;
XREGS[5] = ARG4;
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B));
}
static Int
p_execute_10(void)
{ /* '$execute_10'(Goal) */
Term t = Deref(ARG1);
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG12));
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
ARG3 = ARG4;
ARG4 = ARG5;
ARG5 = ARG6;
ARG6 = ARG7;
ARG7 = ARG8;
ARG8 = ARG9;
ARG9 = ARG10;
ARG10 = ARG11;
pe = PredPropByFunc(Yap_MkFunctor(a,10),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/11");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+10), mod);
XREGS[Arity+10] = ARG11;
XREGS[Arity+9] = ARG10;
XREGS[Arity+8] = ARG9;
XREGS[Arity+7] = ARG8;
XREGS[Arity+6] = ARG7;
XREGS[Arity+5] = ARG6;
XREGS[Arity+4] = ARG5;
XREGS[Arity+3] = ARG4;
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,12), mod);
ptr = RepPair(t);
XREGS[12] = ARG11;
XREGS[11] = ARG10;
XREGS[10] = ARG9;
XREGS[9] = ARG8;
XREGS[8] = ARG7;
XREGS[7] = ARG6;
XREGS[6] = ARG5;
XREGS[5] = ARG4;
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B));
}
#ifdef DEPTH_LIMIT
static Int
p_execute_depth_limit(void) {
Term d = Deref(ARG2);
if (IsVarTerm(d)) {
Yap_Error(INSTANTIATION_ERROR,d,"depth_bound_call/2");
} else if (!IsIntTerm(d)) {
Yap_Error(TYPE_ERROR_INTEGER, d, "depth_bound_call/2");
return(FALSE);
}
DEPTH = MkIntTerm(IntOfTerm(d)*2);
return(p_execute());
}
#endif
static Int
p_pred_goal_expansion_on(void) {
/* a goal needs expansion if we have goal_expansion defined or
if the goal is a meta-call */
return PRED_GOAL_EXPANSION_ON;
}
static Int
p_at_execute(void)
{ /* '$execute'(Goal,ClauseNumber) */
Term t = Deref(ARG1), tmod = Deref(ARG2), t2 = Deref(ARG3);
unsigned int arity;
Prop pe;
Atom a;
SMALLUNSGN mod = Yap_LookupModule(tmod);
restart_exec:
if (IsAtomTerm(t)) {
a = AtomOfTerm(t);
pe = PredPropByAtom(a, mod);
arity = 0;
} else if (IsApplTerm(t)) {
register Functor f = FunctorOfTerm(t);
register unsigned int i;
register CELL *pt;
if (IsBlobFunctor(f))
return(FALSE);
if (f == FunctorModule) {
Term tmod = ArgOfTerm(1,t);
if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
mod = Yap_LookupModule(tmod);
t = ArgOfTerm(2,t);
goto restart_exec;
}
if (IsVarTerm(tmod)) {
Yap_Error(INSTANTIATION_ERROR, ARG1, "calling clause in debugger");
}
Yap_Error(TYPE_ERROR_ATOM, ARG1, "calling clause in debugger");
}
pe = PredPropByFunc(f,mod);
arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
/* I cannot use the standard macro here because
otherwise I would dereference the argument and
might skip a svar */
pt = RepAppl(t)+1;
for (i = 1; i <= arity; ++i)
#if SBA
{
Term d0 = *pt++;
if (d0 == 0)
XREGS[i] = (CELL)(pt-1);
else
XREGS[i] = d0;
}
#else
XREGS[i] = *pt++;
#endif
} else
return (FALSE); /* for the moment */
if (IsVarTerm(t2) || !IsIntTerm(t2))
return (FALSE);
/* N = arity; */
/* call may not define new system predicates!! */
return (CallClause(RepPredProp(pe), IntOfTerm(t2)));
}
static int
exec_absmi(int top)
{
int lval;
if (top && (lval = sigsetjmp (Yap_RestartEnv, 1)) != 0) {
switch(lval) {
case 1:
{ /* restart */
/* otherwise, SetDBForThrow will fail entering critical mode */
Yap_PrologMode = UserMode;
/* find out where to cut to */
#if defined(__GNUC__)
#if defined(hppa) || defined(__alpha)
/* siglongjmp resets the TR hardware register */
restore_TR();
#endif
#if defined(__alpha)
/* siglongjmp resets the H hardware register */
restore_H();
#endif
#endif
yap_flags[SPY_CREEP_FLAG] = 0;
LOCK(SignalLock);
CreepFlag = CalculateStackGap();
Yap_PrologMode = UserMode;
UNLOCK(SignalLock);
P = (yamop *)FAILCODE;
}
break;
case 2:
{
/* arithmetic exception */
/* must be done here, otherwise siglongjmp will clobber all the registers */
Yap_Error(Yap_matherror,TermNil,NULL);
/* reset the registers so that we don't have trash in abstract machine */
Yap_set_fpu_exceptions(yap_flags[LANGUAGE_MODE_FLAG] == 1);
P = (yamop *)FAILCODE;
Yap_PrologMode = UserMode;
}
break;
case 3:
{ /* saved state */
return(FALSE);
}
default:
/* do nothing */
Yap_PrologMode = UserMode;
}
} else {
Yap_PrologMode = UserMode;
}
return(Yap_absmi(0));
}
static int
do_goal(yamop *CodeAdr, int arity, CELL *pt, int top)
{
choiceptr saved_b = B;
/* create an initial pseudo environment so that when garbage
collection is going up in the environment chain it doesn't get
confused */
EX = 0L;
YENV = ASP;
YENV[E_CP] = (CELL)P;
YENV[E_CB] = (CELL)B;
YENV[E_E] = (CELL)ENV;
#ifdef DEPTH_LIMIT
YENV[E_DEPTH] = DEPTH;
#endif
ENV = YENV;
ASP -= EnvSizeInCells;
/* and now create a pseudo choicepoint for much the same reasons */
/* CP = YESCODE; */
/* keep a place where you can inform you had an exception */
{
int i;
for (i = 0; i < arity; i++) {
XREGS[i+1] = *pt++;
}
}
B = (choiceptr)ASP;
B--;
#ifdef TABLING
if (top) {
DepFr_cons_cp(GLOBAL_root_dep_fr) = B;
}
#endif /* TABLING */
B->cp_h = H;
B->cp_tr = TR;
B->cp_cp = CP;
B->cp_ap = NOCODE;
B->cp_env = ENV;
B->cp_b = saved_b;
#ifdef DEPTH_LIMIT
B->cp_depth = DEPTH;
#endif /* DEPTH_LIMIT */
YENV = ASP = (CELL *)B;
HB = H;
YENV[E_CB] = Unsigned (B);
P = (yamop *) CodeAdr;
CP = YESCODE;
S = CellPtr (RepPredProp (PredPropByFunc (Yap_MkFunctor(AtomCall, 1),0))); /* A1 mishaps */
return(exec_absmi(top));
}
int
Yap_exec_absmi(int top)
{
return exec_absmi(top);
}
Int
Yap_execute_goal(Term t, int nargs, SMALLUNSGN mod)
{
Int out;
yamop *CodeAdr;
yamop *saved_p, *saved_cp;
Prop pe;
PredEntry *ppe;
CELL *pt;
/* preserve the current restart environment */
/* visualc*/
/* just keep the difference because of possible garbage collections */
saved_p = P;
saved_cp = CP;
if (IsAtomTerm(t)) {
Atom a = AtomOfTerm(t);
pt = NULL;
pe = PredPropByAtom(a, mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
if (IsBlobFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE,t,"call/1");
return(FALSE);
}
/* I cannot use the standard macro here because
otherwise I would dereference the argument and
might skip a svar */
pt = RepAppl(t)+1;
pe = PredPropByFunc(f, mod);
} else {
Yap_Error(TYPE_ERROR_CALLABLE,t,"call/1");
return(FALSE);
}
ppe = RepPredProp(pe);
if (pe == NIL) {
return(CallMetaCall(mod));
}
READ_LOCK(ppe->PRWLock);
if (IsAtomTerm(t)) {
CodeAdr = RepPredProp (pe)->CodeOfPred;
READ_UNLOCK(ppe->PRWLock);
out = do_goal(CodeAdr, 0, pt, FALSE);
} else {
Functor f = FunctorOfTerm(t);
CodeAdr = RepPredProp (pe)->CodeOfPred;
READ_UNLOCK(ppe->PRWLock);
out = do_goal(CodeAdr, ArityOfFunctor(f), pt, FALSE);
}
if (out == 1) {
choiceptr old_B;
/* we succeeded, let's prune */
/* restore the old environment */
/* get to previous environment */
#ifdef YAPOR
CUT_prune_to((choiceptr)(ENV[E_CB]));
#else
B = (choiceptr)(ENV[E_CB]);
#endif /* YAPOR */
#ifdef TABLING
abolish_incomplete_subgoals(B);
#endif /* TABLING */
/* find out where we have the old arguments */
old_B = ((choiceptr)(ENV-(EnvSizeInCells+nargs+1)))-1;
CP = saved_cp;
P = saved_p;
ASP = ENV;
*--ASP = MkIntTerm(0);
#ifdef DEPTH_LIMIT
DEPTH= ENV[E_DEPTH];
#endif
ENV = (CELL *)(ENV[E_E]);
/* we have failed, and usually we would backtrack to this B,
trouble is, we may also have a delayed cut to do */
if (B != NULL)
HB = B->cp_h;
YENV = ENV;
return(TRUE);
} else if (out == 0) {
ASP = B->cp_env;
P = saved_p;
CP = saved_cp;
H = B->cp_h;
#ifdef DEPTH_LIMIT
DEPTH= B->cp_depth;
#endif
/* ASP should be set to the top of the local stack when we
did the call */
ASP = B->cp_env;
/* YENV should be set to the current environment */
YENV = ENV = (CELL *)((B->cp_env)[E_E]);
B = B->cp_b;
SET_BB(B);
HB = PROTECT_FROZEN_H(B);
return(FALSE);
} else {
Yap_Error(SYSTEM_ERROR,TermNil,"emulator crashed");
return(FALSE);
}
}
void
Yap_trust_last(void)
{
ASP = B->cp_env;
P = (yamop *)(B->cp_env[E_CP]);
CP = B->cp_cp;
H = B->cp_h;
#ifdef DEPTH_LIMIT
DEPTH= B->cp_depth;
#endif
YENV= ASP = B->cp_env;
ENV = (CELL *)((B->cp_env)[E_E]);
B = B->cp_b;
if (B) {
SET_BB(B);
HB = PROTECT_FROZEN_H(B);
}
}
int
Yap_RunTopGoal(Term t)
{
yamop *CodeAdr;
Prop pe;
PredEntry *ppe;
CELL *pt;
UInt arity;
SMALLUNSGN mod = CurrentModule;
int goal_out = 0;
restart_runtopgoal:
if (IsAtomTerm(t)) {
Atom a = AtomOfTerm(t);
pt = NULL;
pe = PredPropByAtom(a, CurrentModule);
arity = 0;
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
if (IsBlobFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE,t,"call/1");
return(FALSE);
}
if (f == FunctorModule) {
Term tmod = ArgOfTerm(1,t);
if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
mod = Yap_LookupModule(tmod);
t = ArgOfTerm(2,t);
goto restart_runtopgoal;
}
}
/* I cannot use the standard macro here because
otherwise I would dereference the argument and
might skip a svar */
pe = Yap_GetPredPropByFunc(f, CurrentModule);
pt = RepAppl(t)+1;
arity = ArityOfFunctor(f);
} else {
Yap_Error(TYPE_ERROR_CALLABLE,t,"call/1");
return(FALSE);
}
ppe = RepPredProp(pe);
if (pe != NIL) {
READ_LOCK(ppe->PRWLock);
}
if (pe == NIL) {
/* we must always start the emulator with Prolog code */
return(FALSE);
}
if (pe != NIL) {
READ_UNLOCK(ppe->PRWLock);
}
CodeAdr = ppe->CodeOfPred;
if (Yap_TrailTop - HeapTop < 2048) {
Yap_PrologMode = BootMode;
Yap_Error(SYSTEM_ERROR,TermNil,
"unable to boot because of too little heap space");
}
goal_out = do_goal(CodeAdr, arity, pt, TRUE);
return(goal_out);
}
static void
restore_regs(Term t)
{
if (IsApplTerm(t)) {
Int i;
Int max = ArityOfFunctor(FunctorOfTerm(t));
CELL *ptr = RepAppl(t)+1;
for (i = 0; i < max; i += 2) {
Int j = IntOfTerm(ptr[0]);
XREGS[j] = ptr[1];
ptr+=2;
}
}
}
/* low level voodoo to restore temporary registers after a call */
static Int
p_restore_regs(void)
{
Term t = Deref(ARG1);
if (IsVarTerm(t)) {
Yap_Error(INSTANTIATION_ERROR,t,"support for coroutining");
return(FALSE);
}
if (IsAtomTerm(t)) return(TRUE);
restore_regs(t);
return(TRUE);
}
/* low level voodoo to cut and then restore temporary registers after a call */
static Int
p_restore_regs2(void)
{
Term t = Deref(ARG1), d0;
choiceptr pt0;
if (IsVarTerm(t)) {
Yap_Error(INSTANTIATION_ERROR,t,"support for coroutining");
return(FALSE);
}
d0 = Deref(ARG2);
if (!IsAtomTerm(t)) {
restore_regs(t);
}
if (IsVarTerm(d0)) {
Yap_Error(INSTANTIATION_ERROR,d0,"support for coroutining");
return(FALSE);
}
if (!IsIntegerTerm(d0)) {
return(FALSE);
}
#if SBA
pt0 = (choiceptr)IntegerOfTerm(d0);
#else
pt0 = (choiceptr)(LCL0-IntOfTerm(d0));
#endif
/* find where to cut to */
if (pt0 > B) {
/* Wow, we're gonna cut!!! */
#ifdef YAPOR
CUT_prune_to(pt0);
#else
B = pt0;
#endif /* YAPOR */
#ifdef TABLING
abolish_incomplete_subgoals(B);
#endif /* TABLING */
HB = B->cp_h;
/* trim_trail();*/
}
return(TRUE);
}
static Int
p_clean_ifcp(void) {
#if SBA
choiceptr pt0 = (choiceptr)IntegerOfTerm(Deref(ARG1));
#else
choiceptr pt0 = (choiceptr)(LCL0-IntOfTerm(Deref(ARG1)));
#endif
if (pt0 == B) {
B = B->cp_b;
HB = B->cp_h;
} else {
pt0->cp_ap = (yamop *)TRUSTFAILCODE;
}
return(TRUE);
}
static Int
JumpToEnv(Term t) {
yamop *pos = NEXTOP(PredDollarCatch->cs.p_code.TrueCodeOfPred,ld),
*catchpos = NEXTOP(PredHandleThrow->cs.p_code.TrueCodeOfPred,ld);
CELL *env;
choiceptr first_func = NULL, B0 = B;
do {
/* find the first choicepoint that may be a catch */
while (B != NULL && B->cp_ap != pos) {
/* we are already doing a catch */
if (B->cp_ap == catchpos) {
P = (yamop *)FAILCODE;
if (first_func != NULL) {
B = first_func;
}
return(FALSE);
}
if (B->cp_ap == NOCODE) {
/* up to the C-code to deal with this! */
B->cp_h = H;
EX = t;
return(FALSE);
}
B = B->cp_b;
}
/* uncaught throw */
if (B == NULL) {
B = B0;
#if PUSH_REGS
restore_absmi_regs(&Yap_standard_regs);
#endif
siglongjmp(Yap_RestartEnv,1);
}
/* is it a continuation? */
env = B->cp_env;
while (env > ENV)
ENV = (CELL *)ENV[E_E];
/* yes, we found it ! */
if (env == ENV) break;
/* oops, try next */
B = B->cp_b;
} while (TRUE);
/* step one environment above */
B->cp_cp = (yamop *)env[E_CP];
B->cp_ap = NEXTOP(PredHandleThrow->CodeOfPred,ld);
B->cp_env = (CELL *)env[E_E];
/* cannot recover Heap because of copy term :-( */
B->cp_h = H;
/* I could backtrack here, but it is easier to leave the unwinding
to the emulator */
B->cp_a3 = t;
P = (yamop *)FAILCODE;
if (first_func != NULL) {
B = first_func;
}
#ifdef TABLING
abolish_incomplete_subgoals(B);
#endif /* TABLING */
return(FALSE);
}
Int
Yap_JumpToEnv(Term t) {
return JumpToEnv(t);
}
/* This does very nasty stuff!!!!! */
static Int
p_jump_env(void) {
return(JumpToEnv(Deref(ARG1)));
}
/* set up a meta-call based on . context info */
static Int
p_generate_pred_info(void) {
ARG1 = ARG3 = ENV[-EnvSizeInCells-1];
ARG4 = ModuleName[IntOfTerm(ENV[-EnvSizeInCells-3])];
ARG2 = cp_as_integer((choiceptr)ENV[E_CB]);
return TRUE;
}
void
Yap_InitYaamRegs(void)
{
#if PUSH_REGS
/* Guarantee that after a longjmp we go back to the original abstract
machine registers */
#ifdef THREADS
int myworker_id = worker_id;
pthread_setspecific(Yap_yaamregs_key, (const void *)ThreadHandle[myworker_id].default_yaam_regs);
ThreadHandle[myworker_id].current_yaam_regs = ThreadHandle[myworker_id].default_yaam_regs;
worker_id = myworker_id;
#else
Yap_regp = &Yap_standard_regs;
#endif
#endif /* PUSH_REGS */
Yap_PutValue (AtomBreak, MkIntTerm (0));
TR = (tr_fr_ptr)Yap_TrailBase;
#ifdef COROUTINING
H = H0 = ((CELL *) Yap_GlobalBase)+ 2048;
#else
H = H0 = (CELL *) Yap_GlobalBase;
#endif
LCL0 = ASP = (CELL *) Yap_LocalBase;
/* notice that an initial choice-point and environment
*must* be created since for the garbage collector to work */
B = NULL;
ENV = NULL;
P = CP = YESCODE;
#ifdef DEPTH_LIMIT
DEPTH = RESET_DEPTH();
#endif
STATIC_PREDICATES_MARKED = FALSE;
#ifdef FROZEN_STACKS
H = HB = H0 = H_FZ = H_BASE;
#ifdef SBA
BSEG =
#endif /* SBA */
BBREG = B_FZ = B_BASE;
TR = TR_FZ = TR_BASE;
#endif /* FROZEN_STACKS */
LOCK(SignalLock);
CreepFlag = CalculateStackGap();
UNLOCK(SignalLock);
EX = 0L;
/* for slots to work */
*--ASP = MkIntTerm(0);
#if COROUTINING
RESET_VARIABLE((CELL *)Yap_GlobalBase);
DelayedVars = Yap_NewTimedVar((CELL)Yap_GlobalBase);
WokenGoals = Yap_NewTimedVar(TermNil);
MutableList = Yap_NewTimedVar(TermNil);
AttsMutableList = Yap_NewTimedVar(TermNil);
#endif
#if defined(YAPOR) || defined(THREADS)
PP = NULL;
WPP = NULL;
PREG_ADDR = NULL;
#endif
}
void
Yap_InitExecFs(void)
{
Yap_InitComma();
Yap_InitCPred("$execute", 1, p_execute, 0);
Yap_InitCPred("$execute_in_mod", 2, p_execute_in_mod, 0);
Yap_InitCPred("$execute", 3, p_at_execute, 0);
Yap_InitCPred("$call_with_args", 2, p_execute_0, 0);
Yap_InitCPred("$call_with_args", 3, p_execute_1, 0);
Yap_InitCPred("$call_with_args", 4, p_execute_2, 0);
Yap_InitCPred("$call_with_args", 5, p_execute_3, 0);
Yap_InitCPred("$call_with_args", 6, p_execute_4, 0);
Yap_InitCPred("$call_with_args", 7, p_execute_5, 0);
Yap_InitCPred("$call_with_args", 8, p_execute_6, 0);
Yap_InitCPred("$call_with_args", 9, p_execute_7, 0);
Yap_InitCPred("$call_with_args", 10, p_execute_8, 0);
Yap_InitCPred("$call_with_args", 11, p_execute_9, 0);
Yap_InitCPred("$call_with_args", 12, p_execute_10, 0);
#ifdef DEPTH_LIMIT
Yap_InitCPred("$execute_under_depth_limit", 2, p_execute_depth_limit, 0);
#endif
Yap_InitCPred("$execute0", 2, p_execute0, 0);
Yap_InitCPred("$save_current_choice_point", 1, p_save_cp, 0);
Yap_InitCPred("$pred_goal_expansion_on", 0, p_pred_goal_expansion_on, SafePredFlag);
Yap_InitCPred("$restore_regs", 1, p_restore_regs, SafePredFlag);
Yap_InitCPred("$restore_regs", 2, p_restore_regs2, SafePredFlag);
Yap_InitCPred("$clean_ifcp", 1, p_clean_ifcp, SafePredFlag);
Yap_InitCPred("$jump_env_and_store_ball", 1, p_jump_env, 0);
Yap_InitCPred("$generate_pred_info", 4, p_generate_pred_info, 0);
}