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7fda0bf07f
yap-6.3/C/lu_absmi_insts.h

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/************************************************************************\
* Logical Updates *
\************************************************************************/
#ifdef INDENT_CODE
{
{
#endif /* INDENT_CODE */
JIT
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/************************************************************************\
* Logical Updates *
\************************************************************************/
/* enter logical pred */
BOp(enter_lu_pred, Illss);
check_trail(TR);
/* mark the indexing code */
{
LogUpdIndex *cl = PREG->y_u.Illss.I;
PredEntry *ap = cl->ClPred;
if (!cl) { FAIL(); } /* in case the index is empty */
if (ap->LastCallOfPred != LUCALL_EXEC) {
/*
only increment time stamp if we are working on current time
stamp
*/
if (ap->TimeStampOfPred >= TIMESTAMP_RESET)
Yap_UpdateTimestamps(ap);
ap->TimeStampOfPred++;
ap->LastCallOfPred = LUCALL_EXEC;
/* fprintf(stderr,"R %x--%d--%ul\n",ap,ap->TimeStampOfPred,ap->ArityOfPE);*/
}
*--YREG = MkIntegerTerm(ap->TimeStampOfPred);
/* fprintf(stderr,"> %p/%p %d %d\n",cl,ap,ap->TimeStampOfPred,PREG->y_u.Illss.s);*/
PREG = PREG->y_u.Illss.l1;
/* indicate the indexing code is being used */
#if MULTIPLE_STACKS
/* just store a reference */
INC_CLREF_COUNT(cl);
TRAIL_CLREF(cl);
#else
if (!(cl->ClFlags & InUseMask)) {
cl->ClFlags |= InUseMask;
TRAIL_CLREF(cl);
}
#endif
}
JMPNext();
ENDBOp();
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BOp(profiled_retry_logical, OtaLl);
check_trail(TR);
{
UInt timestamp;
CACHE_Y(B);
#if defined(YAPOR) || defined(THREADS)
if (PP != PREG->y_u.OtaLl.d->ClPred) {
if (PP) UNLOCKPE(15,PP);
PP = PREG->y_u.OtaLl.d->ClPred;
PELOCK(15,PP);
}
#endif
timestamp = IntegerOfTerm(((CELL *)(B_YREG+1))[PREG->y_u.OtaLl.s]);
if (!VALID_TIMESTAMP(timestamp, PREG->y_u.OtaLl.d)) {
/* jump to next instruction */
PREG=PREG->y_u.OtaLl.n;
JMPNext();
}
restore_yaam_regs(PREG->y_u.OtaLl.n);
restore_args(PREG->y_u.OtaLl.s);
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LOCK(PREG->y_u.OtaLl.d->ClPred->StatisticsForPred->lock);
PREG->y_u.OtaLl.d->ClPred->StatisticsForPred->NOfRetries++;
UNLOCK(PREG->y_u.OtaLl.d->ClPred->StatisticsForPred->lock);
split absmi
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#ifdef THREADS
PP = PREG->y_u.OtaLl.d->ClPred;
#endif
PREG = PREG->y_u.OtaLl.d->ClCode;
#ifdef FROZEN_STACKS
S_YREG = (CELL *) PROTECT_FROZEN_B(B_YREG);
set_cut(S_YREG, B->cp_b);
#else
set_cut(S_YREG, B_YREG->cp_b);
#endif /* FROZEN_STACKS */
SET_BB(B_YREG);
ENDCACHE_Y();
}
JMPNext();
ENDBOp();
BOp(profiled_trust_logical, OtILl);
CACHE_Y(B);
{
LogUpdIndex *cl = PREG->y_u.OtILl.block;
PredEntry *ap = cl->ClPred;
LogUpdClause *lcl = PREG->y_u.OtILl.d;
UInt timestamp = IntegerOfTerm(((CELL *)(B_YREG+1))[ap->ArityOfPE]);
#if defined(YAPOR) || defined(THREADS)
if (PP != ap) {
if (PP) UNLOCKPE(16,PP);
PP = ap;
PELOCK(16,PP);
}
#endif
if (!VALID_TIMESTAMP(timestamp, lcl)) {
/* jump to next alternative */
PREG = FAILCODE;
} else {
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LOCK(ap->StatisticsForPred->lock);
ap->StatisticsForPred->NOfRetries++;
UNLOCK(ap->StatisticsForPred->lock);
split absmi
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PREG = lcl->ClCode;
}
/* HEY, leave indexing block alone!! */
/* check if we are the ones using this code */
#if MULTIPLE_STACKS
DEC_CLREF_COUNT(cl);
/* clear the entry from the trail */
B->cp_tr--;
TR = B->cp_tr;
/* actually get rid of the code */
if (cl->ClRefCount == 0 && (cl->ClFlags & (ErasedMask|DirtyMask))) {
if (PREG != FAILCODE) {
/* I am the last one using this clause, hence I don't need a lock
to dispose of it
*/
if (lcl->ClRefCount == 1) {
/* make sure the clause isn't destroyed */
/* always add an extra reference */
INC_CLREF_COUNT(lcl);
TRAIL_CLREF(lcl);
}
}
if (cl->ClFlags & ErasedMask) {
saveregs();
Yap_ErLogUpdIndex(cl);
setregs();
} else {
saveregs();
Yap_CleanUpIndex(cl);
setregs();
}
save_pc();
}
#else
if (TrailTerm(B->cp_tr-1) == CLREF_TO_TRENTRY(cl) &&
B->cp_tr != B->cp_b->cp_tr) {
cl->ClFlags &= ~InUseMask;
--B->cp_tr;
#if FROZEN_STACKS
if (B->cp_tr > TR_FZ)
#endif
{
TR = B->cp_tr;
}
/* next, recover space for the indexing code if it was erased */
if (cl->ClFlags & (ErasedMask|DirtyMask)) {
if (PREG != FAILCODE) {
/* make sure we don't erase the clause we are jumping to,
notice that we can erase a number of refs in one go. */
if (!(lcl->ClFlags & InUseMask)) {
lcl->ClFlags |= InUseMask;
TRAIL_CLREF(lcl);
}
}
if (cl->ClFlags & ErasedMask) {
saveregs();
Yap_ErLogUpdIndex(cl);
setregs();
} else {
saveregs();
Yap_CleanUpIndex(cl);
setregs();
}
save_pc();
}
}
#endif
#ifdef YAPOR
if (SCH_top_shared_cp(B)) {
SCH_last_alternative(PREG, B_YREG);
restore_args(ap->ArityOfPE);
#ifdef FROZEN_STACKS
S_YREG = (CELL *) PROTECT_FROZEN_B(B_YREG);
#else
S_YREG++;
#endif /* FROZEN_STACKS */
set_cut(S_YREG, B->cp_b);
} else
#endif /* YAPOR */
{
pop_yaam_regs();
pop_args(ap->ArityOfPE);
S_YREG--;
#ifdef FROZEN_STACKS
S_YREG = (CELL *) PROTECT_FROZEN_B(B_YREG);
#endif /* FROZEN_STACKS */
set_cut(S_YREG, B);
}
SET_BB(B_YREG);
ENDCACHE_Y();
JMPNext();
}
ENDBOp();
JIT
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BOp(try_logical, OtaLl);
check_trail(TR);
{
UInt timestamp;
CACHE_Y(YREG);
timestamp = IntegerOfTerm(S_YREG[0]);
/* fprintf(stderr,"+ %p/%p %d %d %d--%u\n",PREG,PREG->y_u.OtaLl.d->ClPred,timestamp,PREG->y_u.OtaLl.d->ClPred->TimeStampOfPred,PREG->y_u.OtaLl.d->ClTimeStart,PREG->y_u.OtaLl.d->ClTimeEnd);*/
/* Point AP to the code that follows this instruction */
/* always do this, even if we are not going to use it */
store_args(PREG->y_u.OtaLl.s);
store_yaam_regs(PREG->y_u.OtaLl.n, 0);
set_cut(S_YREG, B);
B = B_YREG;
#ifdef YAPOR
SCH_set_load(B_YREG);
#endif /* YAPOR */
#ifdef YAPOR
PP = PREG->y_u.OtaLl.d->ClPred;
#endif /* YAPOR */
if (!VALID_TIMESTAMP(timestamp, PREG->y_u.OtaLl.d)) {
/* jump to next alternative */
PREG=PREG->y_u.OtaLl.n;
} else {
PREG = PREG->y_u.OtaLl.d->ClCode;
}
SET_BB(B_YREG);
ENDCACHE_Y();
}
JMPNext();
ENDBOp();
BOp(count_retry_logical, OtaLl);
check_trail(TR);
{
UInt timestamp;
CACHE_Y(B);
#if defined(YAPOR) || defined(THREADS)
if (PP != PREG->y_u.OtaLl.d->ClPred) {
if (PP) UNLOCKPE(15,PP);
PP = PREG->y_u.OtaLl.d->ClPred;
PELOCK(15,PP);
}
#endif
timestamp = IntegerOfTerm(((CELL *)(B_YREG+1))[PREG->y_u.OtaLl.s]);
if (!VALID_TIMESTAMP(timestamp, PREG->y_u.OtaLl.d)) {
/* jump to next instruction */
PREG=PREG->y_u.OtaLl.n;
JMPNext();
}
restore_yaam_regs(PREG->y_u.OtaLl.n);
restore_args(PREG->y_u.OtaLl.s);
LOCAL_RetriesCounter--;
if (LOCAL_RetriesCounter == 0) {
saveregs();
Yap_NilError(RETRY_COUNTER_UNDERFLOW,"");
setregs();
JMPNext();
}
LOCAL_PredEntriesCounter--;
if (LOCAL_PredEntriesCounter == 0) {
saveregs();
Yap_NilError(PRED_ENTRY_COUNTER_UNDERFLOW,"");
setregs();
JMPNext();
}
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LOCK(PREG->y_u.OtaLl.d->ClPred->StatisticsForPred->lock);
PREG->y_u.OtaLl.d->ClPred->StatisticsForPred->NOfRetries++;
UNLOCK(PREG->y_u.OtaLl.d->ClPred->StatisticsForPred->lock);
JIT
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#ifdef THREADS
PP = PREG->y_u.OtaLl.d->ClPred;
#endif
PREG = PREG->y_u.OtaLl.d->ClCode;
#ifdef FROZEN_STACKS
S_YREG = (CELL *) PROTECT_FROZEN_B(B_YREG);
set_cut(S_YREG, B->cp_b);
#else
set_cut(S_YREG, B_YREG->cp_b);
#endif /* FROZEN_STACKS */
SET_BB(B_YREG);
ENDCACHE_Y();
}
JMPNext();
ENDBOp();
BOp(count_trust_logical, OtILl);
CACHE_Y(B);
{
LogUpdIndex *cl = PREG->y_u.OtILl.block;
PredEntry *ap = cl->ClPred;
LogUpdClause *lcl = PREG->y_u.OtILl.d;
UInt timestamp = IntegerOfTerm(((CELL *)(B_YREG+1))[ap->ArityOfPE]);
#if defined(YAPOR) || defined(THREADS)
if (PP != ap) {
if (PP) UNLOCKPE(16,PP);
PP = ap;
PELOCK(16,PP);
}
#endif
if (!VALID_TIMESTAMP(timestamp, lcl)) {
/* jump to next alternative */
PREG = FAILCODE;
} else {
LOCAL_RetriesCounter--;
if (LOCAL_RetriesCounter == 0) {
saveregs();
Yap_NilError(RETRY_COUNTER_UNDERFLOW,"");
setregs();
JMPNext();
}
LOCAL_PredEntriesCounter--;
if (LOCAL_PredEntriesCounter == 0) {
saveregs();
Yap_NilError(PRED_ENTRY_COUNTER_UNDERFLOW,"");
setregs();
JMPNext();
}
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LOCK(ap->StatisticsForPred->lock);
ap->StatisticsForPred->NOfRetries++;
UNLOCK(ap->StatisticsForPred->lock);
JIT
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PREG = lcl->ClCode;
}
/* HEY, leave indexing block alone!! */
/* check if we are the ones using this code */
#if MULTIPLE_STACKS
PELOCK(2, ap);
PP = ap;
DEC_CLREF_COUNT(cl);
/* clear the entry from the trail */
--B->cp_tr;
TR = B->cp_tr;
/* actually get rid of the code */
if (cl->ClRefCount == 0 && (cl->ClFlags & (ErasedMask|DirtyMask))) {
if (PREG != FAILCODE) {
/* I am the last one using this clause, hence I don't need a lock
to dispose of it
*/
if (lcl->ClRefCount == 1) {
/* make sure the clause isn't destroyed */
/* always add an extra reference */
INC_CLREF_COUNT(lcl);
TRAIL_CLREF(lcl);
}
}
if (cl->ClFlags & ErasedMask) {
saveregs();
Yap_ErLogUpdIndex(cl);
setregs();
} else {
saveregs();
Yap_CleanUpIndex(cl);
setregs();
}
save_pc();
}
#else
if (TrailTerm(B->cp_tr-1) == CLREF_TO_TRENTRY(cl) &&
B->cp_tr != B->cp_b->cp_tr) {
cl->ClFlags &= ~InUseMask;
--B->cp_tr;
#if FROZEN_STACKS
if (B->cp_tr > TR_FZ)
#endif
{
TR = B->cp_tr;
}
/* next, recover space for the indexing code if it was erased */
if (cl->ClFlags & (ErasedMask|DirtyMask)) {
if (PREG != FAILCODE) {
/* make sure we don't erase the clause we are jumping too */
if (!(lcl->ClFlags & InUseMask)) {
lcl->ClFlags |= InUseMask;
TRAIL_CLREF(lcl);
}
}
if (cl->ClFlags & ErasedMask) {
saveregs();
Yap_ErLogUpdIndex(cl);
setregs();
} else {
saveregs();
Yap_CleanUpIndex(cl);
setregs();
}
save_pc();
}
}
#endif
#ifdef YAPOR
if (SCH_top_shared_cp(B)) {
SCH_last_alternative(PREG, B_YREG);
restore_args(ap->ArityOfPE);
#ifdef FROZEN_STACKS
split absmi
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S_YREG = (CELL *) PROTECT_FROZEN_B(B_YREG);
JIT
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#else
S_YREG++;
#endif /* FROZEN_STACKS */
set_cut(S_YREG, B->cp_b);
} else
#endif /* YAPOR */
{
pop_yaam_regs();
pop_args(ap->ArityOfPE);
S_YREG--;
#ifdef FROZEN_STACKS
S_YREG = (CELL *) PROTECT_FROZEN_B(B_YREG);
split absmi
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#endif /* FROZEN_STACKS */
JIT
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set_cut(S_YREG, B);
}
SET_BB(B_YREG);
ENDCACHE_Y();
JMPNext();
}
ENDBOp();
BOp(retry_logical, OtaLl);
check_trail(TR);
{
UInt timestamp;
CACHE_Y(B);
#if defined(YAPOR) || defined(THREADS)
if (PP != PREG->y_u.OtaLl.d->ClPred) {
if (PP) UNLOCKPE(15,PP);
PP = PREG->y_u.OtaLl.d->ClPred;
PELOCK(15,PP);
split absmi
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}
JIT
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#endif
timestamp = IntegerOfTerm(((CELL *)(B_YREG+1))[PREG->y_u.OtaLl.s]);
/* fprintf(stderr,"^ %p/%p %d %d %d--%u\n",PREG,PREG->y_u.OtaLl.d->ClPred,timestamp,PREG->y_u.OtaLl.d->ClPred->TimeStampOfPred,PREG->y_u.OtaLl.d->ClTimeStart,PREG->y_u.OtaLl.d->ClTimeEnd);*/
if (!VALID_TIMESTAMP(timestamp, PREG->y_u.OtaLl.d)) {
/* jump to next instruction */
PREG=PREG->y_u.OtaLl.n;
JMPNext();
}
restore_yaam_regs(PREG->y_u.OtaLl.n);
restore_at_least_one_arg(PREG->y_u.OtaLl.s);
#ifdef THREADS
PP = PREG->y_u.OtaLl.d->ClPred;
#endif
PREG = PREG->y_u.OtaLl.d->ClCode;
#ifdef FROZEN_STACKS
S_YREG = (CELL *) PROTECT_FROZEN_B(B_YREG);
set_cut(S_YREG, B->cp_b);
#else
set_cut(S_YREG, B_YREG->cp_b);
#endif /* FROZEN_STACKS */
split absmi
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SET_BB(B_YREG);
ENDCACHE_Y();
JIT
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}
JMPNext();
ENDBOp();
BOp(trust_logical, OtILl);
CACHE_Y(B);
{
LogUpdIndex *cl = PREG->y_u.OtILl.block;
PredEntry *ap = cl->ClPred;
LogUpdClause *lcl = PREG->y_u.OtILl.d;
UInt timestamp = IntegerOfTerm(((CELL *)(B_YREG+1))[ap->ArityOfPE]);
/* fprintf(stderr,"- %p/%p %d %d %p\n",PREG,ap,timestamp,ap->TimeStampOfPred,PREG->y_u.OtILl.d->ClCode);*/
#if defined(YAPOR) || defined(THREADS)
if (PP != ap) {
if (PP) UNLOCKPE(16,PP);
PP = ap;
PELOCK(16,PP);
}
#endif
if (!VALID_TIMESTAMP(timestamp, lcl)) {
/* jump to next alternative */
PREG = FAILCODE;
} else {
PREG = lcl->ClCode;
}
/* HEY, leave indexing block alone!! */
/* check if we are the ones using this code */
#if MULTIPLE_STACKS
DEC_CLREF_COUNT(cl);
/* clear the entry from the trail */
B->cp_tr--;
TR = B->cp_tr;
/* actually get rid of the code */
if (cl->ClRefCount == 0 && (cl->ClFlags & (ErasedMask|DirtyMask))) {
if (PREG != FAILCODE) {
if (lcl->ClRefCount == 1) {
/* make sure the clause isn't destroyed */
/* always add an extra reference */
INC_CLREF_COUNT(lcl);
TRAIL_CLREF(lcl);
B->cp_tr = TR;
}
}
if (cl->ClFlags & ErasedMask) {
saveregs();
Yap_ErLogUpdIndex(cl);
setregs();
} else {
saveregs();
Yap_CleanUpIndex(cl);
setregs();
}
save_pc();
}
#else
if (TrailTerm(B->cp_tr-1) == CLREF_TO_TRENTRY(cl) &&
B->cp_tr != B->cp_b->cp_tr) {
cl->ClFlags &= ~InUseMask;
B->cp_tr--;
#if FROZEN_STACKS
if (B->cp_tr > TR_FZ)
#endif
{
TR = B->cp_tr;
}
/* next, recover space for the indexing code if it was erased */
if (cl->ClFlags & (ErasedMask|DirtyMask)) {
if (PREG != FAILCODE) {
/* make sure we don't erase the clause we are jumping too */
if (!(lcl->ClFlags & InUseMask)) {
lcl->ClFlags |= InUseMask;
TRAIL_CLREF(lcl);
B->cp_tr = TR;
}
}
if (cl->ClFlags & ErasedMask) {
saveregs();
Yap_ErLogUpdIndex(cl);
setregs();
} else {
saveregs();
Yap_CleanUpIndex(cl);
setregs();
}
}
}
#endif
#ifdef YAPOR
if (SCH_top_shared_cp(B)) {
SCH_last_alternative(PREG, B_YREG);
restore_args(ap->ArityOfPE);
#ifdef FROZEN_STACKS
S_YREG = (CELL *) PROTECT_FROZEN_B(B_YREG);
#else
S_YREG++;
#endif /* FROZEN_STACKS */
set_cut(S_YREG, B->cp_b);
} else
#endif /* YAPOR */
{
pop_yaam_regs();
pop_args(ap->ArityOfPE);
S_YREG--;
#ifdef FROZEN_STACKS
S_YREG = (CELL *) PROTECT_FROZEN_B(B_YREG);
#endif /* FROZEN_STACKS */
set_cut(S_YREG, B);
}
SET_BB(B_YREG);
ENDCACHE_Y();
#if defined(YAPOR) || defined(THREADS)
if (PREG == FAILCODE) {
UNLOCKPE(26,PP);
PP = NULL;
}
#endif
split absmi
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JMPNext();
}
ENDBOp();
/*****************************************************************
* enter a logical semantics dynamic predicate *
*****************************************************************/
/* only meaningful with THREADS on! */
/* lock logical updates predicate. */
Op(lock_lu, p);
#if PARALLEL_YAP
if (PP) {
GONext();
}
PP = PREG->y_u.p.p;
PELOCK(3, PP);
#endif
PREG = NEXTOP(PREG, p);
GONext();
ENDOp();
/* only meaningful with THREADS on! */
/* lock logical updates predicate. */
Op(unlock_lu, e);
#if defined(YAPOR) || defined(THREADS)
if (PP) {
UNLOCKPE(1,PP);
PP = NULL;
}
#endif
PREG = NEXTOP(PREG, e);
GONext();
ENDOp();
/* enter logical pred */
BOp(alloc_for_logical_pred, L);
check_trail(TR);
/* say that an environment is using this clause */
/* we have our own copy for the clause */
#if MULTIPLE_STACKS
{
LogUpdClause *cl = PREG->y_u.L.ClBase;
#if PARALLEL_YAP
PredEntry *ap = cl->ClPred;
#endif
/* always add an extra reference */
INC_CLREF_COUNT(cl);
TRAIL_CLREF(cl);
UNLOCKPE(2,ap);
PP = NULL;
}
#else
{
LogUpdClause *cl = (LogUpdClause *)PREG->y_u.L.ClBase;
if (!(cl->ClFlags & InUseMask)) {
cl->ClFlags |= InUseMask;
TRAIL_CLREF(cl);
}
}
#endif
PREG = NEXTOP(PREG, L);
JMPNext();
ENDBOp();
/* copy database term */
BOp(copy_idb_term, e);
{
LogUpdClause *cl = ClauseCodeToLogUpdClause(PREG);
Term t;
SET_ASP(YREG, E_CB*sizeof(CELL));
saveregs();
while ((t = Yap_FetchTermFromDB(cl->lusl.ClSource)) == 0L) {
if (PP) UNLOCKPE(3,PP);
#if defined(YAPOR) || defined(THREADS)
PP = NULL;
#endif
if (LOCAL_Error_TYPE == OUT_OF_ATTVARS_ERROR) {
LOCAL_Error_TYPE = YAP_NO_ERROR;
if (!Yap_growglobal(NULL)) {
Yap_NilError(OUT_OF_ATTVARS_ERROR, LOCAL_ErrorMessage);
FAIL();
}
} else {
LOCAL_Error_TYPE = YAP_NO_ERROR;
if (!Yap_gc(3, ENV, CP)) {
Yap_NilError(OUT_OF_STACK_ERROR, LOCAL_ErrorMessage);
FAIL();
}
}
#if defined(YAPOR) || defined(THREADS)
PELOCK(5,ClauseCodeToLogUpdClause(PREG)->ClPred);
PP = ClauseCodeToLogUpdClause(PREG)->ClPred;
#endif
}
if (!Yap_IUnify(ARG2, t)) {
setregs();
#if defined(YAPOR) || defined(THREADS)
if (PP) UNLOCKPE(6,PP);
PP = NULL;
#endif
FAIL();
}
if (!Yap_IUnify(ARG3, MkDBRefTerm((DBRef)cl))) {
setregs();
#if defined(YAPOR) || defined(THREADS)
if (PP) UNLOCKPE(5,PP);
PP = NULL;
#endif
FAIL();
}
setregs();
#if MULTIPLE_STACKS
/* always add an extra reference */
INC_CLREF_COUNT(cl);
TRAIL_CLREF(cl);
if (PP) UNLOCKPE(7,PP);
PP = NULL;
#else
if (!(cl->ClFlags & InUseMask)) {
/* Clause *cl = (Clause *)PREG->y_u.EC.ClBase;
PREG->y_u.EC.ClTrail = TR-(tr_fr_ptr)LOCAL_TrailBase;
PREG->y_u.EC.ClENV = LCL0-YREG;*/
cl->ClFlags |= InUseMask;
TRAIL_CLREF(cl);
}
#endif
}
PREG = CPREG;
YREG = ENV;
#ifdef DEPTH_LIMIT
DEPTH = YREG[E_DEPTH];
#endif
JMPNext();
ENDBOp();
/* unify with database term */
BOp(unify_idb_term, e);
{
LogUpdClause *cl = ClauseCodeToLogUpdClause(PREG);
saveregs();
if (!Yap_IUnify(ARG2, cl->lusl.ClSource->Entry)) {
setregs();
UNLOCKPE(8,PP);
#if defined(YAPOR) || defined(THREADS)
PP = NULL;
#endif
FAIL();
}
if (!Yap_IUnify(ARG3, MkDBRefTerm((DBRef)cl))) {
setregs();
UNLOCKPE(9,PP);
#if defined(YAPOR) || defined(THREADS)
PP = NULL;
#endif
FAIL();
}
setregs();
/* say that an environment is using this clause */
/* we have our own copy for the clause */
#if MULTIPLE_STACKS
/* always add an extra reference */
INC_CLREF_COUNT(cl);
TRAIL_CLREF(cl);
UNLOCKPE(10,PP);
PP = NULL;
#else
if (!(cl->ClFlags & InUseMask)) {
/* Clause *cl = (Clause *)PREG->y_u.EC.ClBase;
PREG->y_u.EC.ClTrail = TR-(tr_fr_ptr)LOCAL_TrailBase;
PREG->y_u.EC.ClENV = LCL0-YREG;*/
cl->ClFlags |= InUseMask;
TRAIL_CLREF(cl);
}
#endif
}
PREG = CPREG;
YREG = ENV;
#ifdef DEPTH_LIMIT
DEPTH = YREG[E_DEPTH];
#endif
JMPNext();
ENDBOp();
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