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change the stack layout: to hold proc object on the stack when procedure 

call is invoked
This commit is contained in:
Yuichi Nishiwaki 2013-10-17 23:29:18 +09:00
parent 1646de5e8d
commit c92a672e01
3 changed files with 15 additions and 19 deletions
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1
include/picrin.h
View File

@ -10,7 +10,6 @@
struct pic_code;
typedef struct pic_callinfo {
struct pic_proc *proc;
int argc;
struct pic_code *pc;
pic_value *sp;

6
src/gc.c
View File

@ -177,11 +177,7 @@ gc_mark_phase(pic_state *pic)
for (stack = pic->stbase; stack != pic->sp; ++stack) {
gc_mark(pic, *stack);
}
/* callinfo */
for (ci = pic->cibase; ci != pic->ci; ++ci) {
gc_mark_object(pic, (struct pic_object *)ci->proc);
}
gc_mark(pic, *stack);
/* arena */
for (i = 0; i < pic->arena_idx; ++i) {

27
src/vm.c
View File

@ -406,7 +406,7 @@ pic_gen_call(pic_state *pic, struct pic_irep *irep, pic_value obj, struct pic_en
++i;
}
irep->code[irep->clen].insn = OP_CALL;
irep->code[irep->clen].u.i = i - 1;
irep->code[irep->clen].u.i = i;
irep->clen++;
}
@ -476,17 +476,16 @@ pic_codegen(pic_state *pic, pic_value obj, struct pic_env *env)
# define VM_LOOP_END } }
#endif
#define PUSH(v) (*pic->sp++ = (v))
#define POP() (*--pic->sp)
#define PUSH(v) (*++pic->sp = (v))
#define POP() (*pic->sp--)
#define PUSHCI() (pic->ci++)
#define POPCI() (--pic->ci)
#define PUSHCI() (++pic->ci)
#define POPCI() (pic->ci--)
pic_value
pic_run(pic_state *pic, struct pic_proc *proc, pic_value args)
{
struct pic_code *pc;
pic_callinfo *ci;
pic_value val;
int ai = pic_gc_arena_preserve(pic);
@ -501,9 +500,11 @@ pic_run(pic_state *pic, struct pic_proc *proc, pic_value args)
pc = proc->u.irep->code;
ci = PUSHCI();
ci->proc = proc;
ci->argc = 0;
/* adjust call frame */
pic->sp[0] = pic_obj_value(proc);
pic->ci->argc = 0;
pic->ci->pc = NULL;
pic->ci->sp = NULL;
VM_LOOP {
CASE(OP_PUSHNIL) {
@ -531,7 +532,7 @@ pic_run(pic_state *pic, struct pic_proc *proc, pic_value args)
NEXT;
}
CASE(OP_LREF) {
PUSH(pic->ci[-1].sp[pc->u.i]);
PUSH(pic->ci->sp[pc->u.i]);
NEXT;
}
CASE(OP_JMP) {
@ -550,12 +551,12 @@ pic_run(pic_state *pic, struct pic_proc *proc, pic_value args)
}
CASE(OP_CALL) {
pic_value c, v;
pic_callinfo *ci;
struct pic_proc *proc;
pic_gc_protect(pic, c = POP());
c = pic->sp[0];
proc = pic_proc_ptr(c);
ci = PUSHCI();
ci->proc = proc;
ci->argc = pc->u.i;
ci->pc = pc;
ci->sp = pic->sp;
@ -575,6 +576,7 @@ pic_run(pic_state *pic, struct pic_proc *proc, pic_value args)
}
CASE(OP_RET) {
pic_value v;
pic_callinfo *ci;
v = POP();
pic->sp -= ci->argc;
@ -636,7 +638,6 @@ pic_run(pic_state *pic, struct pic_proc *proc, pic_value args)
} VM_LOOP_END;
STOP:
POPCI();
val = POP();
#if GC_DEBUG