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#include <ejit/ejit.h>
#include "common.h"
union interp_ret ejit_interp(struct ejit_func *f, size_t argc, struct ejit_arg args[argc], bool run, void ***labels_wb)
{
static void *labels[OPCODE_COUNT] = {
[MOVI] = &&movi,
[MOVR] = &&movr,
[MOVR_F] = &&movr_f,
[ADDR] = &&addr,
[ADDR_F] = &&addr_f,
[SUBR] = &&subr,
[SUBR_F] = &&subr_f,
[BLTR] = &&bltr,
[RET] = &&ret,
[RET_I] = &&ret_i,
[RET_F] = &&ret_f,
[RET_FI] = &&ret_fi,
[ARG] = &&arg,
[ARG_I] = &&arg_i,
[ARG_F] = &&arg_f,
[ARG_FI] = &&arg_fi,
[PARAM] = &¶m,
[PARAM_F] = &¶m_f,
[CALLI] = &&calli,
[CALLI_F] = &&calli_f,
[START] = &&start,
[END] = &&end,
};
if (!run) {
*labels_wb = labels;
return (union interp_ret){.r = 0};
}
/** @todo this can be optimized by for example using a common buffer
* 'stack' */
long *gpr = malloc(f->gpr * sizeof(long));
long *fpr = malloc(f->fpr * sizeof(long));
struct vec call_args = vec_create(sizeof(struct ejit_arg));
struct ejit_insn *insns = f->insns.buf;
struct ejit_insn i;
long retval = 0; double retval_f = 0.;
size_t pc = 0;
#define DO(x) x: { i = insns[pc];
#define JUMP(a) goto *insns[pc = a].addr;
#define DISPATCH() } goto *insns[++pc].addr;
DO(start);
DISPATCH();
DO(end);
goto out_int;
DISPATCH();
DO(movi);
gpr[i.r0] = i.o;
DISPATCH();
DO(movr);
gpr[i.r0] = gpr[i.r1];
DISPATCH();
DO(movr_f);
fpr[i.r0] = fpr[i.r1];
DISPATCH();
DO(addr);
gpr[i.r0] = gpr[i.r1] + gpr[i.r2];
DISPATCH();
DO(addr_f);
fpr[i.r0] = fpr[i.r1] + fpr[i.r2];
DISPATCH();
DO(subr);
gpr[i.r0] = gpr[i.r1] - gpr[i.r2];
DISPATCH();
DO(subr_f);
fpr[i.r0] = fpr[i.r1] - fpr[i.r2];
DISPATCH();
DO(bltr);
if (gpr[i.r0] < gpr[i.r1])
JUMP(i.o);
DISPATCH();
DO(param);
gpr[i.r0] = args[i.o].l;
DISPATCH();
DO(param_f);
fpr[i.r0] = args[i.o].d;
DISPATCH();
DO(arg);
struct ejit_arg a = ejit_build_arg(i.r1, gpr[i.r0]);
vec_append(&call_args, &a);
DISPATCH();
DO(arg_i);
struct ejit_arg a = ejit_build_arg(i.r1, i.o);
vec_append(&call_args, &a);
DISPATCH();
DO(arg_f);
struct ejit_arg a = ejit_build_arg_f(i.r1, fpr[i.r0]);
vec_append(&call_args, &a);
DISPATCH();
DO(arg_fi);
struct ejit_arg a = ejit_build_arg_f(i.r1, i.d);
vec_append(&call_args, &a);
DISPATCH();
DO(calli);
struct ejit_func *f = i.p;
retval = ejit_run_func(f, vec_len(&call_args), call_args.buf);
vec_reset(&call_args);
DISPATCH();
DO(calli_f);
struct ejit_func *f = i.p;
retval_f = ejit_run_func_f(f, vec_len(&call_args), call_args.buf);
vec_reset(&call_args);
DISPATCH();
/* dispatch is technically unnecessary for returns, but keep it for
* symmetry */
DO(ret);
retval = gpr[i.r0];
goto out_int;
DISPATCH();
DO(ret_i);
retval = i.o;
goto out_int;
DISPATCH();
DO(ret_f);
retval_f = fpr[i.r0];
goto out_float;
DISPATCH();
DO(ret_fi);
retval_f = i.d;
goto out_float;
DISPATCH();
#undef DISPATCH
#undef JUMP
#undef DO
out_int:
vec_destroy(&call_args);
free(gpr);
free(fpr);
return (union interp_ret){.r = retval};
out_float:
vec_destroy(&call_args);
free(gpr);
free(fpr);
return (union interp_ret){.d = retval_f};
}
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