* Copyright (c) 1994-2000.
*
* $RCSfile: Interpreter.c,v $
- * $Revision: 1.14 $
- * $Date: 2001/02/05 17:27:48 $
+ * $Revision: 1.34 $
+ * $Date: 2002/02/15 22:15:08 $
* ---------------------------------------------------------------------------*/
-#ifdef GHCI
-
+#if !defined(SMP)
+#include "PosixSource.h"
+#else
+/* Hack and slash.. */
+#include "Stg.h"
+#endif
#include "Rts.h"
#include "RtsAPI.h"
#include "RtsUtils.h"
#define BCO_LIT(n) (W_)literals[n]
#define BCO_ITBL(n) itbls[n]
-#define LOAD_STACK_POINTERS \
- iSp = cap->rCurrentTSO->sp; iSu = cap->rCurrentTSO->su;
+#define LOAD_STACK_POINTERS \
+ iSp = cap->r.rCurrentTSO->sp; \
+ iSu = cap->r.rCurrentTSO->su; \
+ /* We don't change this ... */ \
+ iSpLim = cap->r.rCurrentTSO->stack + RESERVED_STACK_WORDS;
-#define SAVE_STACK_POINTERS \
- cap->rCurrentTSO->sp = iSp; cap->rCurrentTSO->su = iSu;
-#define RETURN(retcode) \
+#define SAVE_STACK_POINTERS \
+ cap->r.rCurrentTSO->sp = iSp; \
+ cap->r.rCurrentTSO->su = iSu;
+
+#define RETURN(retcode) \
SAVE_STACK_POINTERS; return retcode;
int it_insns;
int it_BCO_entries;
-int it_ofreq[26];
-int it_oofreq[26][26];
+int it_ofreq[27];
+int it_oofreq[27][27];
int it_lastopc;
void interp_startup ( void )
for (i = 0; i < N_CLOSURE_TYPES; i++)
it_unknown_entries[i] = 0;
it_slides = it_insns = it_BCO_entries = 0;
- for (i = 0; i < 26; i++) it_ofreq[i] = 0;
- for (i = 0; i < 26; i++)
- for (j = 0; j < 26; j++)
+ for (i = 0; i < 27; i++) it_ofreq[i] = 0;
+ for (i = 0; i < 27; i++)
+ for (j = 0; j < 27; j++)
it_oofreq[i][j] = 0;
it_lastopc = 0;
}
void interp_shutdown ( void )
{
int i, j, k, o_max, i_max, j_max;
- fprintf(stderr, "%d constrs entered -> (%d BCO, %d UPD, %d ???)\n",
+ fprintf(stderr, "%d constrs entered -> (%d BCO, %d UPD, %d ??? )\n",
it_retto_BCO + it_retto_UPDATE + it_retto_other,
it_retto_BCO, it_retto_UPDATE, it_retto_other );
fprintf(stderr, "%d total entries, %d unknown entries \n",
}
fprintf(stderr, "%d insns, %d slides, %d BCO_entries\n",
it_insns, it_slides, it_BCO_entries);
- for (i = 0; i < 26; i++)
+ for (i = 0; i < 27; i++)
fprintf(stderr, "opcode %2d got %d\n", i, it_ofreq[i] );
for (k = 1; k < 20; k++) {
o_max = 0;
i_max = j_max = 0;
- for (i = 0; i < 26; i++) {
- for (j = 0; j < 26; j++) {
+ for (i = 0; i < 27; i++) {
+ for (j = 0; j < 27; j++) {
if (it_oofreq[i][j] > o_max) {
o_max = it_oofreq[i][j];
i_max = i; j_max = j;
LOAD_STACK_POINTERS;
- /* We don't change this ... */
- iSpLim = cap->rCurrentTSO->stack + RESERVED_STACK_WORDS;
-
/* Main object-entering loop. Object to be entered is on top of
stack. */
nextEnter:
// checkSanity(1);
// iSp--; StackWord(0) = obj;
- // checkStack(iSp,cap->rCurrentTSO->stack+cap->rCurrentTSO->stack_size,iSu);
+ // checkStack(iSp,cap->r.rCurrentTSO->stack+cap->r.rCurrentTSO->stack_size,iSu);
// iSp++;
- printStack(iSp,cap->rCurrentTSO->stack+cap->rCurrentTSO->stack_size,iSu);
+ printStack(iSp,cap->r.rCurrentTSO->stack+cap->r.rCurrentTSO->stack_size,iSu);
fprintf(stderr, "\n\n");
);
case SEQ_FRAME:
/* Too complicated ... adopt the Usual Solution. */
- fprintf(stderr, "!!! SEQ frame in PAP update\n");
+ /* fprintf(stderr, "!!! SEQ frame in PAP update\n"); */
goto defer_to_sched;
case CATCH_FRAME:
register StgInfoTable** itbls = (StgInfoTable**)
(&bco->itbls->payload[0]);
+ /* Heap check */
if (doYouWantToGC()) {
iSp--; StackWord(0) = (W_)bco;
- cap->rCurrentTSO->what_next = ThreadEnterGHC;
+ cap->r.rCurrentTSO->what_next = ThreadEnterInterp;
RETURN(HeapOverflow);
}
+ /* "Standard" stack check */
+ if (iSp - (INTERP_STACK_CHECK_THRESH+1) < iSpLim) {
+ iSp--;
+ StackWord(0) = (W_)obj;
+ cap->r.rCurrentTSO->what_next = ThreadEnterInterp;
+ RETURN(StackOverflow);
+ }
+
+ /* Context-switch check */
+ if (context_switch) {
+ iSp--;
+ StackWord(0) = (W_)obj;
+ cap->r.rCurrentTSO->what_next = ThreadEnterInterp;
+ RETURN(ThreadYielding);
+ }
+
+
# ifdef INTERP_STATS
it_lastopc = 0; /* no opcode */
# endif
IF_DEBUG(evaluator,
//if (do_print_stack) {
//fprintf(stderr, "\n-- BEGIN stack\n");
- //printStack(iSp,cap->rCurrentTSO->stack+cap->rCurrentTSO->stack_size,iSu);
+ //printStack(iSp,cap->r.rCurrentTSO->stack+cap->r.rCurrentTSO->stack_size,iSu);
//fprintf(stderr, "-- END stack\n\n");
//}
do_print_stack = 1;
fprintf(stderr, "%d %p\n", i, (StgPtr)(*(iSp+i)));
fprintf(stderr,"\n");
}
- //if (do_print_stack) checkStack(iSp,cap->rCurrentTSO->stack+cap->rCurrentTSO->stack_size,iSu);
+ //if (do_print_stack) checkStack(iSp,cap->r.rCurrentTSO->stack+cap->r.rCurrentTSO->stack_size,iSu);
);
# ifdef INTERP_STATS
it_insns++;
- ASSERT( (int)instrs[bciPtr] >= 0 && (int)instrs[bciPtr] < 26 );
+ ASSERT( (int)instrs[bciPtr] >= 0 && (int)instrs[bciPtr] < 27 );
it_ofreq[ (int)instrs[bciPtr] ] ++;
it_oofreq[ it_lastopc ][ (int)instrs[bciPtr] ] ++;
it_lastopc = (int)instrs[bciPtr];
switch (BCO_NEXT) {
+ case bci_STKCHECK: {
+ /* An explicit stack check; we hope these will be
+ rare. */
+ int stk_words_reqd = BCO_NEXT + 1;
+ if (iSp - stk_words_reqd < iSpLim) {
+ iSp--;
+ StackWord(0) = (W_)obj;
+ cap->r.rCurrentTSO->what_next = ThreadEnterInterp;
+ RETURN(StackOverflow);
+ }
+ goto nextInsn;
+ }
case bci_ARGCHECK: {
int i;
StgPAP* pap;
fprintf(stderr,"\tBuilt ");
printObj((StgClosure*)pap);
);
- cap->rCurrentTSO->what_next = ThreadEnterGHC;
+ cap->r.rCurrentTSO->what_next = ThreadEnterGHC;
RETURN(ThreadYielding);
}
case bci_PUSH_L: {
ap = (StgAP_UPD*)allocate_UPD(request);
StackWord(-1) = (W_)ap;
ap->n_args = n_payload;
- SET_HDR(ap, &stg_AP_UPD_info, ??)
+ SET_HDR(ap, &stg_AP_UPD_info, CCS_SYSTEM/*ToDo*/)
iSp --;
goto nextInsn;
}
bciPtr = failto;
goto nextInsn;
}
+ case bci_TESTLT_F: {
+ /* The top thing on the stack should be a tagged float. */
+ int discr = BCO_NEXT;
+ int failto = BCO_NEXT;
+ StgFloat stackFlt, discrFlt;
+ ASSERT(sizeofW(StgFloat) == StackWord(0));
+ stackFlt = PK_FLT( & StackWord(1) );
+ discrFlt = PK_FLT( & BCO_LIT(discr) );
+ if (stackFlt >= discrFlt)
+ bciPtr = failto;
+ goto nextInsn;
+ }
+ case bci_TESTEQ_F: {
+ /* The top thing on the stack should be a tagged float. */
+ int discr = BCO_NEXT;
+ int failto = BCO_NEXT;
+ StgFloat stackFlt, discrFlt;
+ ASSERT(sizeofW(StgFloat) == StackWord(0));
+ stackFlt = PK_FLT( & StackWord(1) );
+ discrFlt = PK_FLT( & BCO_LIT(discr) );
+ if (stackFlt != discrFlt)
+ bciPtr = failto;
+ goto nextInsn;
+ }
/* Control-flow ish things */
case bci_ENTER: {
if (ret_itbl == (StgInfoTable*)&stg_ctoi_ret_R1p_info
|| ret_itbl == (StgInfoTable*)&stg_ctoi_ret_R1n_info
|| ret_itbl == (StgInfoTable*)&stg_ctoi_ret_F1_info
- || ret_itbl == (StgInfoTable*)&stg_ctoi_ret_D1_info) {
+ || ret_itbl == (StgInfoTable*)&stg_ctoi_ret_D1_info
+ || ret_itbl == (StgInfoTable*)&stg_ctoi_ret_V_info) {
/* Returning to interpreted code. Interpret the BCO
immediately underneath the itbl. */
StgBCO* ret_bco = (StgBCO*)StackWord(tag +1+1);
the TOS value into R1/F1/D1 and do a standard
compiled-code return. */
StgInfoTable* magic_itbl = BCO_ITBL(o_itoc_itbl);
- StackWord(0) = (W_)magic_itbl;
- cap->rCurrentTSO->what_next = ThreadRunGHC;
- RETURN(ThreadYielding);
+ if (magic_itbl != NULL) {
+ StackWord(0) = (W_)magic_itbl;
+ cap->r.rCurrentTSO->what_next = ThreadRunGHC;
+ RETURN(ThreadYielding);
+ } else {
+ /* Special case -- returning a VoidRep to
+ compiled code. T.O.S is the VoidRep tag,
+ and underneath is the return itbl. Zap the
+ tag and enter the itbl. */
+ ASSERT(StackWord(0) == (W_)NULL);
+ iSp ++;
+ cap->r.rCurrentTSO->what_next = ThreadRunGHC;
+ RETURN(ThreadYielding);
+ }
}
}
-
+ case bci_SWIZZLE: {
+ int stkoff = BCO_NEXT;
+ signed short n = (signed short)(BCO_NEXT);
+ StackWord(stkoff) += (W_)n;
+ goto nextInsn;
+ }
+ case bci_CCALL: {
+ StgInt tok;
+ int o_itbl = BCO_NEXT;
+ void(*marshall_fn)(void*) = (void (*)(void*))BCO_LIT(o_itbl);
+ SAVE_STACK_POINTERS;
+ tok = suspendThread(&cap->r,rtsFalse);
+ marshall_fn ( (void*)(& StackWord(0) ) );
+ cap = (Capability *)((void *)resumeThread(tok,rtsFalse) - sizeof(StgFunTable));
+ LOAD_STACK_POINTERS;
+ goto nextInsn;
+ }
+ case bci_JMP: {
+ /* BCO_NEXT modifies bciPtr, so be conservative. */
+ int nextpc = BCO_NEXT;
+ bciPtr = nextpc;
+ goto nextInsn;
+ }
case bci_CASEFAIL:
barf("interpretBCO: hit a CASEFAIL");
- /* As yet unimplemented */
- case bci_TESTLT_F:
- case bci_TESTEQ_F:
-
/* Errors */
default:
barf("interpretBCO: unknown or unimplemented opcode");
printObj(obj);
);
iSp--; StackWord(0) = (W_)obj;
- cap->rCurrentTSO->what_next = ThreadEnterGHC;
+ cap->r.rCurrentTSO->what_next = ThreadEnterGHC;
RETURN(ThreadYielding);
}
} /* switch on object kind */
barf("fallen off end of object-type switch in interpretBCO()");
}
-
-#endif /* GHCI */
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