193 lines
4.5 KiB
C
193 lines
4.5 KiB
C
/************************************************************************ \
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* Instructions for implemeting 'or;' *
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\************************************************************************/
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#ifdef INDENT_CODE
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{
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{
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{
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#endif /* INDENT_CODE */
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BOp(jump, l);
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PREG = PREG->y_u.l.l;
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JMPNext();
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ENDBOp();
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/* This instruction is called when the previous goal
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was interrupted when waking up goals
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*/
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BOp(move_back, l);
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PREG = (yamop *)(((char *)PREG)-(Int)(NEXTOP((yamop *)NULL,Osbpp)));
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JMPNext();
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ENDBOp();
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/* This instruction is called when the previous goal
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was interrupted when waking up goals
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*/
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BOp(skip, l);
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PREG = NEXTOP(PREG,l);
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JMPNext();
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ENDBOp();
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Op(either, Osblp);
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#ifdef LOW_LEVEL_TRACER
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if (Yap_do_low_level_trace) {
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low_level_trace(try_or, (PredEntry *)PREG, NULL);
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}
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#endif
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#ifdef COROUTINING
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CACHE_Y_AS_ENV(YREG);
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check_stack(NoStackEither, HR);
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ENDCACHE_Y_AS_ENV();
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either_notest:
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#endif
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BEGD(d0);
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/* Try to preserve the environment */
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d0 = PREG->y_u.Osblp.s;
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BEGCHO(pt1);
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pt1 = (choiceptr) ((char *) YREG + (yslot) d0);
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#ifdef FROZEN_STACKS
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{
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choiceptr top_b = PROTECT_FROZEN_B(B);
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#ifdef YAPOR_SBA
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if (pt1 > top_b || pt1 < (choiceptr)HR) pt1 = top_b;
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#else
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if (pt1 > top_b) pt1 = top_b;
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#endif /* YAPOR_SBA */
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}
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#else
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if (pt1 > B) {
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pt1 = B;
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}
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#endif /* FROZEN_STACKS */
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pt1 = (choiceptr)(((CELL *) pt1)-1);
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*(CELL **) pt1 = YREG;
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store_yaam_regs_for_either(PREG->y_u.Osblp.l, PREG);
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SREG = (CELL *) (B = pt1);
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#ifdef YAPOR
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SCH_set_load(pt1);
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#endif /* YAPOR */
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SET_BB(pt1);
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ENDCHO(pt1);
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/* skip the current instruction plus the next one */
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PREG = NEXTOP(NEXTOP(PREG, Osblp),l);
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GONext();
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ENDD(d0);
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#ifdef COROUTINING
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NoStackEither:
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PROCESS_INT(interrupt_either, either_notest);
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#endif
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ENDOp();
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Op(or_else, Osblp);
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HR = HBREG = PROTECT_FROZEN_H(B);
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ENV = B->cp_env;
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B->cp_cp = PREG;
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#ifdef DEPTH_LIMIT
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DEPTH = B->cp_depth;
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#endif /* DEPTH_LIMIT */
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SET_BB(PROTECT_FROZEN_B(B));
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#ifdef YAPOR
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if (SCH_top_shared_cp(B)) {
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SCH_new_alternative(PREG, PREG->y_u.Osblp.l);
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} else
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#endif /* YAPOR */
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B->cp_ap = PREG->y_u.Osblp.l;
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PREG = NEXTOP(PREG, Osblp);
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YREG = (CELL *) B->cp_a1;
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GONext();
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ENDOp();
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#ifdef YAPOR
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Op(or_last, Osblp);
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#else
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Op(or_last, p);
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#endif /* YAPOR */
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BEGCHO(pt0);
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pt0 = B;
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#ifdef YAPOR
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if (SCH_top_shared_cp(B)) {
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HR = HBREG = PROTECT_FROZEN_H(pt0);
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YREG = (CELL *) pt0->cp_a1;
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ENV = pt0->cp_env;
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#ifdef DEPTH_LIMIT
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DEPTH = pt0->cp_depth;
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#endif /* DEPTH_LIMIT */
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SCH_new_alternative(PREG, NULL);
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}
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else
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#endif /* YAPOR */
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{
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B = pt0->cp_b;
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HR = PROTECT_FROZEN_H(pt0);
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YREG = (CELL *) pt0->cp_a1;
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ENV = pt0->cp_env;
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#ifdef DEPTH_LIMIT
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DEPTH = pt0->cp_depth;
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#endif /* DEPTH_LIMIT */
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HBREG = PROTECT_FROZEN_H(B);
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}
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#ifdef YAPOR
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PREG = NEXTOP(PREG, Osblp);
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#else
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PREG = NEXTOP(PREG, p);
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#endif /* YAPOR */
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SET_BB(PROTECT_FROZEN_B(B));
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GONext();
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ENDCHO(pt0);
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ENDOp();
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/************************************************************************\
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* Pop operations *
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\************************************************************************/
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OpRW(pop_n, s);
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/* write mode might have been called from read mode */
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BEGD(d0);
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d0 = PREG->y_u.os.s;
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SP = (CELL *) (((char *) SP) + d0);
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ENDD(d0);
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BEGD(d0);
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d0 = SP[0];
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if (d0) {
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START_PREFETCH(s);
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SREG = (CELL *) (SP[1]);
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SP += 2;
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PREG = NEXTOP(PREG, s);
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GONext();
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END_PREFETCH();
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}
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else {
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START_PREFETCH_W(s);
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SREG = (CELL *) (SP[1]);
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SP += 2;
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PREG = NEXTOP(PREG, s);
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GONextW();
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END_PREFETCH_W();
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}
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ENDD(d0);
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ENDOpRW();
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OpRW(pop, e);
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BEGD(d0);
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d0 = SP[0];
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SREG = (CELL *) (SP[1]);
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SP += 2;
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if (d0) {
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START_PREFETCH(e);
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PREG = NEXTOP(PREG, e);
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GONext();
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END_PREFETCH();
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}
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else {
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START_PREFETCH_W(e);
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PREG = NEXTOP(PREG, e);
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GONextW();
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END_PREFETCH_W();
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}
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ENDD(d0);
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ENDOpRW();
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