-
-#if 0
/* -----------------------------------------------------------------------------
* Bytecode evaluator
*
* Copyright (c) 1994-2000.
*
* $RCSfile: Interpreter.c,v $
- * $Revision: 1.4 $
- * $Date: 2000/12/19 16:48:35 $
+ * $Revision: 1.5 $
+ * $Date: 2000/12/20 14:47:22 $
* ---------------------------------------------------------------------------*/
-#include "Rts.h"
-
+#ifdef GHCI
-
-#include "RtsFlags.h"
+#include "Rts.h"
+#include "RtsAPI.h"
#include "RtsUtils.h"
-#include "Updates.h"
+#include "Closures.h"
+#include "TSO.h"
+#include "Schedule.h"
+#include "RtsFlags.h"
#include "Storage.h"
-#include "SchedAPI.h" /* for createGenThread */
-#include "Schedule.h" /* for context_switch */
-#include "Bytecodes.h"
-#include "ForeignCall.h"
-#include "PrimOps.h" /* for __{encode,decode}{Float,Double} */
-#include "Prelude.h"
-#include "Itimer.h"
-#include "Evaluator.h"
-#include "sainteger.h"
+#include "Updates.h"
-#ifdef DEBUG
+#include "Bytecodes.h"
#include "Printer.h"
#include "Disassembler.h"
-#include "Sanity.h"
-#include "StgRun.h"
-#endif
-
-#include <math.h> /* These are for primops */
-#include <limits.h> /* These are for primops */
-#include <float.h> /* These are for primops */
-#ifdef HAVE_IEEE754_H
-#include <ieee754.h> /* These are for primops */
-#endif
+#include "Interpreter.h"
-#endif /* 0 */
-#include <stdio.h>
-
-int /*StgThreadReturnCode*/ interpretBCO ( void* /* Capability* */ cap )
-{
- fprintf(stderr, "Greetings, earthlings. I am not yet implemented. Bye!\n");
- exit(1);
-}
-
-#if 0
/* --------------------------------------------------------------------------
* The new bytecode interpreter
* ------------------------------------------------------------------------*/
/* Sp points to the lowest live word on the stack. */
-#define StackWord(n) ((W_*)iSp)[n]
-#define BCO_NEXT bco_instrs[bciPtr++]
-#define BCO_PTR(n) bco_ptrs[n]
-
+#define StackWord(n) iSp[n]
+#define BCO_NEXT instrs[bciPtr++]
+#define BCO_PTR(n) (W_)ptrs[n]
+#define BCO_LIT(n) (W_)literals[n]
+#define BCO_ITBL(n) itbls[n]
StgThreadReturnCode interpretBCO ( Capability* cap )
{
/* Use of register here is primarily to make it clear to compilers
that these entities are non-aliasable.
*/
- register StgPtr iSp; /* local state -- stack pointer */
+ register W_* iSp; /* local state -- stack pointer */
register StgUpdateFrame* iSu; /* local state -- frame pointer */
register StgPtr iSpLim; /* local state -- stack lim pointer */
register StgClosure* obj;
iSpLim = cap->rCurrentTSO->stack + RESERVED_STACK_WORDS;
IF_DEBUG(evaluator,
- enterCountI++;
fprintf(stderr,
"\n---------------------------------------------------------------\n");
- fprintf(stderr,"Entering: ",); printObj(obj);
- fprintf(stderr,"xSp = %p\txSu = %p\n", xSp, xSu);
+ fprintf(stderr,"Entering: "); printObj((StgClosure*)StackWord(0));
+ fprintf(stderr,"iSp = %p\tiSu = %p\n", iSp, iSu);
fprintf(stderr, "\n" );
printStack(iSp,cap->rCurrentTSO->stack+cap->rCurrentTSO->stack_size,iSu);
fprintf(stderr, "\n\n");
stack. */
nextEnter:
- obj = StackWord(0); iSp++;
+ obj = (StgClosure*)StackWord(0); iSp++;
switch ( get_itbl(obj)->type ) {
case INVALID_OBJECT:
- barf("Invalid object %p",obj);
+ barf("Invalid object %p",(StgPtr)obj);
- case BCO: bco_entry:
+ case BCO:
/* ---------------------------------------------------- */
/* Start of the bytecode interpreter */
/* ---------------------------------------------------- */
{
- register StgWord8* bciPtr; /* instruction pointer */
- register StgBCO* bco = (StgBCO*)obj;
+ register int bciPtr = 1; /* instruction pointer */
+ register StgBCO* bco = (StgBCO*)obj;
+ register UShort* instrs = (UShort*)(&bco->instrs->payload[0]);
+ register StgWord* literals = (StgWord*)(&bco->literals->payload[0]);
+ register StgPtr* ptrs = (StgPtr*)(&bco->ptrs->payload[0]);
+ register StgInfoTable** itbls = (StgInfoTable**)
+ (&bco->itbls->payload[0]);
+
if (doYouWantToGC()) {
- iSp--; StackWord(0) = bco;
+ iSp--; StackWord(0) = (W_)bco;
return HeapOverflow;
}
nextInsn:
- ASSERT((StgWord)(PC) < bco->n_instrs);
+ ASSERT(bciPtr <= instrs[0]);
IF_DEBUG(evaluator,
- fprintf(stderr,"Sp = %p\tSu = %p\tpc = %d\t", xSp, xSu, PC);
- disInstr(bco,PC);
+ fprintf(stderr,"iSp = %p\tiSu = %p\tpc = %d\t", iSp, iSu, bciPtr);
+ disInstr(bco,bciPtr);
if (0) { int i;
fprintf(stderr,"\n");
for (i = 8; i >= 0; i--)
- fprintf(stderr, "%d %p\n", i, (StgPtr)(*(gSp+i)));
+ fprintf(stderr, "%d %p\n", i, (StgPtr)(*(iSp+i)));
}
fprintf(stderr,"\n");
);
switch (BCO_NEXT) {
+ case bci_ARGCHECK: {
+ int i;
+ StgPAP* pap;
+ int arg_words_reqd = BCO_NEXT;
+ int arg_words_avail = ((W_*)iSu) - ((W_*)iSp);
+ if (arg_words_avail >= arg_words_reqd) goto nextInsn;
+ /* Handle arg check failure. Copy the spare args
+ into a PAP frame. */
+ pap = (StgPAP*)allocate(PAP_sizeW(arg_words_avail));
+ SET_HDR(pap,&stg_PAP_info,CC_pap);
+ pap->n_args = arg_words_avail;
+ for (i = 0; i < arg_words_avail; i++)
+ pap->payload[i] = (StgClosure*)StackWord(i);
+ /* Push on the stack and defer to the scheduler. */
+ iSp = (StgPtr)iSu;
+ iSp --;
+ StackWord(0) = (W_)pap;
+ return ThreadEnterGHC;
+ }
case bci_PUSH_L: {
int o1 = BCO_NEXT;
StackWord(-1) = StackWord(o1);
- Sp--;
+ iSp--;
goto nextInsn;
}
case bci_PUSH_LL: {
int o2 = BCO_NEXT;
StackWord(-1) = StackWord(o1);
StackWord(-2) = StackWord(o2);
- Sp -= 2;
+ iSp -= 2;
goto nextInsn;
}
case bci_PUSH_LLL: {
StackWord(-1) = StackWord(o1);
StackWord(-2) = StackWord(o2);
StackWord(-3) = StackWord(o3);
- Sp -= 3;
+ iSp -= 3;
goto nextInsn;
}
case bci_PUSH_G: {
int o1 = BCO_NEXT;
StackWord(-1) = BCO_PTR(o1);
- Sp -= 3;
+ iSp -= 1;
goto nextInsn;
}
case bci_PUSH_AS: {
int o_itbl = BCO_NEXT;
StackWord(-1) = BCO_LIT(o_itbl);
StackWord(-2) = BCO_PTR(o_bco);
- Sp -= 2;
+ iSp -= 2;
+ goto nextInsn;
+ }
+ case bci_PUSH_UBX: {
+ int o_lits = BCO_NEXT;
+ int n_words = BCO_NEXT;
+ for (; n_words > 0; n_words--) {
+ iSp --;
+ StackWord(0) = BCO_LIT(o_lits);
+ o_lits++;
+ }
goto nextInsn;
}
case bci_PUSH_TAG: {
W_ tag = (W_)(BCO_NEXT);
StackWord(-1) = tag;
- Sp --;
- goto nextInsn;
- }
- case bci_PUSH_LIT:{
- int o = BCO_NEXT;
- StackWord(-1) = BCO_LIT(o);
- Sp --;
+ iSp --;
goto nextInsn;
}
case bci_SLIDE: {
int n = BCO_NEXT;
int by = BCO_NEXT;
- ASSERT(Sp+n+by <= (StgPtr)xSu);
+ ASSERT(iSp+n+by <= (W_*)iSu);
/* a_1, .. a_n, b_1, .. b_by, s => a_1, .. a_n, s */
while(--n >= 0) {
StackWord(n+by) = StackWord(n);
}
- Sp += by;
+ iSp += by;
goto nextInsn;
}
case bci_ALLOC: {
int n_payload = BCO_NEXT;
P_ p = allocate(AP_sizeW(n_payload));
- StackWord(-1) = p;
- Sp --;
+ StackWord(-1) = (W_)p;
+ iSp --;
goto nextInsn;
}
- case bci_MKAP: {
- int off = BCO_NEXT;
+ case bci_MKAP: {
+ int i;
+ int stkoff = BCO_NEXT;
int n_payload = BCO_NEXT - 1;
- StgAP_UPD* ap = StackWord(off);
+ StgAP_UPD* ap = (StgAP_UPD*)StackWord(stkoff);
ap->n_args = n_payload;
ap->fun = (StgClosure*)StackWord(0);
for (i = 0; i < n_payload; i++)
- ap->payload[i] = StackWord(i+1);
- Sp += n_payload+1;
+ ap->payload[i] = (StgClosure*)StackWord(i+1);
+ iSp += n_payload+1;
goto nextInsn;
}
case bci_UNPACK: {
/* Unpack N ptr words from t.o.s constructor */
/* The common case ! */
+ int i;
int n_words = BCO_NEXT;
- StgClosure* con = StackWord(0);
- Sp -= n_words;
+ StgClosure* con = (StgClosure*)StackWord(0);
+ iSp -= n_words;
for (i = 0; i < n_words; i++)
- StackWord(i) = con->payload[i];
+ StackWord(i) = (W_)con->payload[i];
goto nextInsn;
}
- case bci_UNPACK_BX: {
+ case bci_UPK_TAG: {
/* Unpack N (non-ptr) words from offset M in the
constructor K words down the stack, and then push
N as a tag, on top of it. Slow but general; we
hope it will be the rare case. */
+ int i;
int n_words = BCO_NEXT;
int con_off = BCO_NEXT;
int stk_off = BCO_NEXT;
- StgClosure* con = StackWord(stk_off);
- Sp -= n_words;
+ StgClosure* con = (StgClosure*)StackWord(stk_off);
+ iSp -= n_words;
for (i = 0; i < n_words; i++)
- StackWord(i) = con->payload[con_off + i];
- Sp --;
+ StackWord(i) = (W_)con->payload[con_off + i];
+ iSp --;
StackWord(0) = n_words;
goto nextInsn;
}
- case bci_PACK:
+ case bci_PACK: {
+ int i;
+ int o_itbl = BCO_NEXT;
+ int n_words = BCO_NEXT;
+ StgInfoTable* itbl = BCO_ITBL(o_itbl);
+ /* A bit of a kludge since n_words = n_p + n_np */
+ int request = CONSTR_sizeW( n_words, 0 );
+ StgClosure* con = (StgClosure*)allocate(request);
+ SET_HDR(con, itbl, ??);
+ for (i = 0; i < n_words; i++)
+ con->payload[i] = (StgClosure*)StackWord(i);
+ iSp += n_words;
+ iSp --;
+ StackWord(0) = (W_)con;
+ goto nextInsn;
+ }
+ case bci_TESTLT_P: {
+ int discr = BCO_NEXT;
+ int failto = BCO_NEXT;
+ StgClosure* con = (StgClosure*)StackWord(0);
+ if (constrTag(con) < discr)
+ bciPtr = failto;
+ goto nextInsn;
+ }
+ case bci_TESTEQ_P: {
+ int discr = BCO_NEXT;
+ int failto = BCO_NEXT;
+ StgClosure* con = (StgClosure*)StackWord(0);
+ if (constrTag(con) != discr)
+ bciPtr = failto;
+ goto nextInsn;
+ }
+
+ /* Control-flow ish things */
+ case bci_ENTER: {
+ goto nextEnter;
+ }
+ case bci_RETURN: {
+ /* Figure out whether returning to interpreted or
+ compiled code. */
+ int o_itoc_itbl = BCO_NEXT;
+ int tag = StackWord(0);
+ StgInfoTable* ret_itbl = (StgInfoTable*)StackWord(tag+1 +1);
+ ASSERT(tag <= 2); /* say ... */
+ if (ret_itbl == (StgInfoTable*)&stg_ctoi_ret_R1_info
+ /* || ret_itbl == stg_ctoi_ret_F1_info
+ || ret_itbl == stg_ctoi_ret_D1_info */) {
+ /* Returning to interpreted code. Interpret the BCO
+ immediately underneath the itbl. */
+ StgBCO* ret_bco = (StgBCO*)StackWord(tag+1 +1+1);
+ iSp --;
+ StackWord(0) = (W_)ret_bco;
+ goto nextEnter;
+ } else {
+ /* Returning (unboxed value) to compiled code.
+ Replace tag with a suitable itbl and ask the
+ scheduler to run it. The itbl code will copy
+ 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;
+ return ThreadRunGHC;
+ }
+ }
+
+ case bci_CASEFAIL:
+ barf("interpretBCO: hit a CASEFAIL");
+
+ /* As yet unimplemented */
case bci_TESTLT_I:
case bci_TESTEQ_I:
case bci_TESTLT_F:
case bci_TESTEQ_F:
case bci_TESTLT_D:
case bci_TESTEQ_D:
- case bci_TESTLT_P:
- case bci_TESTEQ_P:
- case bci_CASEFAIL:
-
- /* Control-flow ish things */
- case bci_ARGCHECK:
- case bci_ENTER:
- case bci_RETURN:
-
+
/* Errors */
- case bci_LABEL:
- default: barf
+ default:
+ barf("interpretBCO: unknown or unimplemented opcode");
} /* switch on opcode */
- goto nextEnter;
+
+ barf("interpretBCO: fell off end of insn loop");
}
/* ---------------------------------------------------- */
fprintf(stderr, "entering unknown closure -- yielding to sched\n");
printObj(obj);
cap->rCurrentTSO->what_next = ThreadEnterGHC;
- iSp--; StackWord(0) = obj;
+ iSp--; StackWord(0) = (W_)obj;
return ThreadYielding;
}
} /* switch on object kind */
- barf("fallen off end of switch in enter()");
+ barf("fallen off end of object-type switch in interpretBCO()");
}
-
-#endif /* 0 */
+#endif /* GHCI */
projects / ghc-hetmet.git / blobdiff