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/***********************************************************************/
/* */
/* Coq Compiler */
/* */
/* Benjamin Gregoire, projets Logical and Cristal */
/* INRIA Rocquencourt */
/* */
/* */
/***********************************************************************/
/* Arnaud Spiwack: expanded the virtual machine with operators used
for fast computation of bounded (31bits) integers */
#include <stdio.h>
#include <stdlib.h>
#include <caml/config.h>
#include <caml/misc.h>
#include <caml/mlvalues.h>
#include <caml/fail.h>
#include <caml/memory.h>
#include "coq_instruct.h"
#include "coq_fix_code.h"
#ifdef THREADED_CODE
char ** coq_instr_table;
char * coq_instr_base;
int arity[STOP+1];
void init_arity () {
/* instruction with zero operand */
arity[ACC0]=arity[ACC1]=arity[ACC2]=arity[ACC3]=arity[ACC4]=arity[ACC5]=
arity[ACC6]=arity[ACC7]=arity[PUSH]=arity[PUSHACC0]=arity[PUSHACC1]=
arity[PUSHACC2]=arity[PUSHACC3]=arity[PUSHACC4]=arity[PUSHACC5]=
arity[PUSHACC6]=arity[PUSHACC7]=arity[ENVACC1]=arity[ENVACC2]=
arity[ENVACC3]=arity[ENVACC4]=arity[PUSHENVACC1]=arity[PUSHENVACC2]=
arity[PUSHENVACC3]=arity[PUSHENVACC4]=arity[APPLY1]=arity[APPLY2]=
arity[APPLY3]=arity[RESTART]=arity[OFFSETCLOSUREM2]=
arity[OFFSETCLOSURE0]=arity[OFFSETCLOSURE2]=arity[PUSHOFFSETCLOSUREM2]=
arity[PUSHOFFSETCLOSURE0]=arity[PUSHOFFSETCLOSURE2]=
arity[GETFIELD0]=arity[GETFIELD1]=arity[SETFIELD0]=arity[SETFIELD1]=
arity[CONST0]=arity[CONST1]=arity[CONST2]=arity[CONST3]=
arity[PUSHCONST0]=arity[PUSHCONST1]=arity[PUSHCONST2]=arity[PUSHCONST3]=
arity[ACCUMULATE]=arity[STOP]=arity[MAKEPROD]=
arity[ADDINT31]=arity[ADDCINT31]=arity[ADDCARRYCINT31]=
arity[SUBINT31]=arity[SUBCINT31]=arity[SUBCARRYCINT31]=
arity[MULCINT31]=arity[MULINT31]=arity[COMPAREINT31]=
arity[DIV21INT31]=arity[DIVINT31]=arity[ADDMULDIVINT31]=
arity[HEAD0INT31]=arity[TAIL0INT31]=
arity[COMPINT31]=arity[DECOMPINT31]=0;
/* instruction with one operand */
arity[ACC]=arity[PUSHACC]=arity[POP]=arity[ENVACC]=arity[PUSHENVACC]=
arity[PUSH_RETADDR]=arity[APPLY]=arity[APPTERM1]=arity[APPTERM2]=
arity[APPTERM3]=arity[RETURN]=arity[GRAB]=arity[OFFSETCLOSURE]=
arity[PUSHOFFSETCLOSURE]=arity[GETGLOBAL]=arity[PUSHGETGLOBAL]=
arity[MAKEBLOCK1]=arity[MAKEBLOCK2]=arity[MAKEBLOCK3]=arity[MAKEBLOCK4]=
arity[MAKEACCU]=arity[CONSTINT]=arity[PUSHCONSTINT]=arity[GRABREC]=
arity[PUSHFIELDS]=arity[GETFIELD]=arity[SETFIELD]=arity[ACCUMULATECOND]=
arity[BRANCH]=arity[ISCONST]= 1;
/* instruction with two operands */
arity[APPTERM]=arity[MAKEBLOCK]=arity[CLOSURE]=
arity[ARECONST]=2;
/* instruction with four operands */
arity[MAKESWITCHBLOCK]=4;
/* instruction with arbitrary operands */
arity[CLOSUREREC]=arity[CLOSURECOFIX]=arity[SWITCH]=0;
}
#endif /* THREADED_CODE */
void * coq_stat_alloc (asize_t sz)
{
void * result = malloc (sz);
if (result == NULL) raise_out_of_memory ();
return result;
}
value coq_makeaccu (value i) {
code_t q;
code_t res = coq_stat_alloc(8);
q = res;
*q++ = VALINSTR(MAKEACCU);
*q = (opcode_t)Int_val(i);
return (value)res;
}
value coq_accucond (value i) {
code_t q;
code_t res = coq_stat_alloc(8);
q = res;
*q++ = VALINSTR(ACCUMULATECOND);
*q = (opcode_t)Int_val(i);
return (value)res;
}
value coq_pushpop (value i) {
code_t res;
int n;
n = Int_val(i);
if (n == 0) {
res = coq_stat_alloc(4);
*res = VALINSTR(STOP);
return (value)res;
}
else {
code_t q;
res = coq_stat_alloc(12);
q = res;
*q++ = VALINSTR(POP);
*q++ = (opcode_t)n;
*q = VALINSTR(STOP);
return (value)res;
}
}
value coq_is_accumulate_code(value code){
code_t q;
int res;
q = (code_t)code;
res = Is_instruction(q,ACCUMULATECOND) || Is_instruction(q,ACCUMULATE);
return Val_bool(res);
}
#ifdef ARCH_BIG_ENDIAN
#define Reverse_32(dst,src) { \
char * _p, * _q; \
char _a, _b; \
_p = (char *) (src); \
_q = (char *) (dst); \
_a = _p[0]; \
_b = _p[1]; \
_q[0] = _p[3]; \
_q[1] = _p[2]; \
_q[3] = _a; \
_q[2] = _b; \
}
#define COPY32(dst,src) Reverse_32(dst,src)
#else
#define COPY32(dst,src) (*dst=*src)
#endif /* ARCH_BIG_ENDIAN */
value coq_tcode_of_code (value code, value size) {
code_t p, q, res;
asize_t len = (asize_t) Long_val(size);
res = coq_stat_alloc(len);
q = res;
len /= sizeof(opcode_t);
for (p = (code_t)code; p < (code_t)code + len; /*nothing*/) {
opcode_t instr;
COPY32(&instr,p);
p++;
if (instr < 0 || instr > STOP){
instr = STOP;
};
*q++ = VALINSTR(instr);
if (instr == SWITCH) {
uint32 i, sizes, const_size, block_size;
COPY32(q,p); p++;
sizes=*q++;
const_size = sizes & 0xFFFF;
block_size = sizes >> 16;
sizes = const_size + block_size;
for(i=0; i<sizes; i++) { COPY32(q,p); p++; q++; };
} else if (instr == CLOSUREREC || instr==CLOSURECOFIX) {
uint32 i, n;
COPY32(q,p); p++; /* ndefs */
n = 3 + 2*(*q); /* ndefs, nvars, start, typlbls,lbls*/
q++;
for(i=1; i<n; i++) { COPY32(q,p); p++; q++; };
} else {
uint32 i, ar;
ar = arity[instr];
for(i=0; i<ar; i++) { COPY32(q,p); p++; q++; };
}
}
return (value)res;
}
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