introduce codegen_state structure
This commit is contained in:
Yuichi Nishiwaki
parent
035de0016b
commit
79ee6f6ae4
163
src/codegen.c
163
src/codegen.c
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@ -51,7 +51,7 @@ new_local_scope(pic_state *pic, pic_value args, codegen_scope *scope)
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}
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static void
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destory_scope(pic_state *pic, codegen_scope *scope)
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destroy_scope(pic_state *pic, codegen_scope *scope)
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{
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if (scope->up) {
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xh_destory(scope->local_tbl);
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@ -59,9 +59,50 @@ destory_scope(pic_state *pic, codegen_scope *scope)
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pic_free(pic, scope);
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}
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static bool
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scope_lookup(pic_state *pic, codegen_scope *scope, const char *key, int *depth, int *idx)
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static struct pic_irep *
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new_irep(pic_state *pic)
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{
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struct pic_irep *irep;
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irep = (struct pic_irep *)pic_alloc(pic, sizeof(struct pic_irep));
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irep->code = (struct pic_code *)pic_alloc(pic, sizeof(struct pic_code) * 1024);
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irep->clen = 0;
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irep->ccapa = 1024;
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return irep;
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}
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static void print_irep(pic_state *, struct pic_irep *);
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typedef struct codegen_state {
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pic_state *pic;
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codegen_scope *scope;
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struct pic_irep *irep;
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} codegen_state;
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static codegen_state *
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new_codegen_state(pic_state *pic)
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{
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codegen_state *state;
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state = (codegen_state *)pic_alloc(pic, sizeof(codegen_state));
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state->pic = pic;
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state->scope = new_global_scope(pic);
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state->irep = new_irep(pic);
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return state;
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}
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static void
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destroy_codegen_state(pic_state *pic, codegen_state *state)
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{
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destroy_scope(pic, state->scope);
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pic_free(pic, state);
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}
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static bool
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scope_lookup(codegen_state *state, const char *key, int *depth, int *idx)
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{
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codegen_scope *scope = state->scope;
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struct xh_entry *e;
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int d = 0;
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@ -101,26 +142,14 @@ scope_global_define(pic_state *pic, const char *name)
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return e->val;
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}
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static struct pic_irep *
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new_irep(pic_state *pic)
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{
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struct pic_irep *irep;
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irep = (struct pic_irep *)pic_alloc(pic, sizeof(struct pic_irep));
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irep->code = (struct pic_code *)pic_alloc(pic, sizeof(struct pic_code) * 1024);
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irep->clen = 0;
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irep->ccapa = 1024;
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return irep;
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}
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static void print_irep(pic_state *, struct pic_irep *);
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static void pic_gen_call(pic_state *, struct pic_irep *, pic_value, codegen_scope *);
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static struct pic_irep *pic_gen_lambda(pic_state *, pic_value, codegen_scope *);
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static void pic_gen_call(codegen_state *, pic_value);
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static struct pic_irep *pic_gen_lambda(codegen_state *, pic_value);
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static void
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pic_gen(pic_state *pic, struct pic_irep *irep, pic_value obj, codegen_scope *scope)
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pic_gen(codegen_state *state, pic_value obj)
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{
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pic_state *pic = state->pic;
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struct pic_irep *irep = state->irep;
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pic_value sDEFINE, sLAMBDA, sIF, sBEGIN, sQUOTE;
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pic_value sCONS, sCAR, sCDR, sNILP;
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pic_value sADD, sSUB, sMUL, sDIV;
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@ -146,7 +175,7 @@ pic_gen(pic_state *pic, struct pic_irep *irep, pic_value obj, codegen_scope *sco
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const char *name;
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name = pic_symbol_ptr(obj)->name;
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b = scope_lookup(pic, scope, name, &depth, &idx);
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b = scope_lookup(state, name, &depth, &idx);
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if (! b) {
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pic_error(pic, "unbound variable");
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}
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@ -177,7 +206,7 @@ pic_gen(pic_state *pic, struct pic_irep *irep, pic_value obj, codegen_scope *sco
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name = pic_symbol_ptr(pic_car(pic, pic_cdr(pic, obj)))->name;
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idx = scope_global_define(pic, name);
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))), scope);
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pic_gen(state, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))));
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irep->code[irep->clen].insn = OP_GSET;
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irep->code[irep->clen].u.i = idx;
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@ -191,26 +220,26 @@ pic_gen(pic_state *pic, struct pic_irep *irep, pic_value obj, codegen_scope *sco
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irep->code[irep->clen].u.i = pic->ilen;
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irep->clen++;
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pic->irep[pic->ilen++] = pic_gen_lambda(pic, obj, scope);
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pic->irep[pic->ilen++] = pic_gen_lambda(state, obj);
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break;
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}
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else if (pic_eq_p(pic, proc, sIF)) {
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int s,t;
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, obj)), scope);
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pic_gen(state, pic_car(pic, pic_cdr(pic, obj)));
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irep->code[irep->clen].insn = OP_JMPIF;
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s = irep->clen++;
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/* if false branch */
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, pic_cdr(pic, pic_cdr(pic, obj)))), scope);
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pic_gen(state, pic_car(pic, pic_cdr(pic, pic_cdr(pic, pic_cdr(pic, obj)))));
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irep->code[irep->clen].insn = OP_JMP;
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t = irep->clen++;
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irep->code[s].u.i = irep->clen - s;
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/* if true branch */
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))), scope);
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pic_gen(state, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))));
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irep->code[t].u.i = irep->clen - t;
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break;
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}
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@ -219,7 +248,7 @@ pic_gen(pic_state *pic, struct pic_irep *irep, pic_value obj, codegen_scope *sco
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seq = pic_cdr(pic, obj);
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for (v = seq; ! pic_nil_p(v); v = pic_cdr(pic, v)) {
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pic_gen(pic, irep, pic_car(pic, v), scope);
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pic_gen(state, pic_car(pic, v));
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irep->code[irep->clen].insn = OP_POP;
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irep->clen++;
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}
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@ -236,60 +265,60 @@ pic_gen(pic_state *pic, struct pic_irep *irep, pic_value obj, codegen_scope *sco
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break;
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}
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else if (pic_eq_p(pic, proc, sCONS)) {
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, obj)), scope);
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))), scope);
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pic_gen(state, pic_car(pic, pic_cdr(pic, obj)));
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pic_gen(state, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))));
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irep->code[irep->clen].insn = OP_CONS;
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irep->clen++;
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break;
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}
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else if (pic_eq_p(pic, proc, sCAR)) {
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, obj)), scope);
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pic_gen(state, pic_car(pic, pic_cdr(pic, obj)));
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irep->code[irep->clen].insn = OP_CAR;
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irep->clen++;
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break;
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}
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else if (pic_eq_p(pic, proc, sCDR)) {
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, obj)), scope);
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pic_gen(state, pic_car(pic, pic_cdr(pic, obj)));
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irep->code[irep->clen].insn = OP_CDR;
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irep->clen++;
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break;
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}
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else if (pic_eq_p(pic, proc, sNILP)) {
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, obj)), scope);
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pic_gen(state, pic_car(pic, pic_cdr(pic, obj)));
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irep->code[irep->clen].insn = OP_NILP;
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irep->clen++;
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break;
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}
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else if (pic_eq_p(pic, proc, sADD)) {
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, obj)), scope);
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))), scope);
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pic_gen(state, pic_car(pic, pic_cdr(pic, obj)));
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pic_gen(state, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))));
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irep->code[irep->clen].insn = OP_ADD;
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irep->clen++;
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break;
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}
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else if (pic_eq_p(pic, proc, sSUB)) {
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, obj)), scope);
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))), scope);
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pic_gen(state, pic_car(pic, pic_cdr(pic, obj)));
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pic_gen(state, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))));
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irep->code[irep->clen].insn = OP_SUB;
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irep->clen++;
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break;
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}
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else if (pic_eq_p(pic, proc, sMUL)) {
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, obj)), scope);
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))), scope);
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pic_gen(state, pic_car(pic, pic_cdr(pic, obj)));
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pic_gen(state, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))));
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irep->code[irep->clen].insn = OP_MUL;
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irep->clen++;
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break;
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}
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else if (pic_eq_p(pic, proc, sDIV)) {
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, obj)), scope);
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pic_gen(pic, irep, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))), scope);
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pic_gen(state, pic_car(pic, pic_cdr(pic, obj)));
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pic_gen(state, pic_car(pic, pic_cdr(pic, pic_cdr(pic, obj))));
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irep->code[irep->clen].insn = OP_DIV;
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irep->clen++;
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break;
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}
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else {
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pic_gen_call(pic, irep, obj, scope);
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pic_gen_call(state, obj);
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break;
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}
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}
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@ -333,8 +362,10 @@ pic_gen(pic_state *pic, struct pic_irep *irep, pic_value obj, codegen_scope *sco
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}
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static void
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pic_gen_call(pic_state *pic, struct pic_irep *irep, pic_value obj, codegen_scope *scope)
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pic_gen_call(codegen_state *state, pic_value obj)
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{
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pic_state *pic = state->pic;
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struct pic_irep *irep = state->irep;
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pic_value seq;
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int i = 0;
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@ -342,7 +373,7 @@ pic_gen_call(pic_state *pic, struct pic_irep *irep, pic_value obj, codegen_scope
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pic_value v;
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v = pic_car(pic, seq);
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pic_gen(pic, irep, v, scope);
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pic_gen(state, v);
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++i;
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}
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irep->code[irep->clen].insn = OP_CALL;
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@ -351,30 +382,35 @@ pic_gen_call(pic_state *pic, struct pic_irep *irep, pic_value obj, codegen_scope
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}
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static struct pic_irep *
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pic_gen_lambda(pic_state *pic, pic_value obj, codegen_scope *scope)
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pic_gen_lambda(codegen_state *state, pic_value obj)
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{
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codegen_scope *new_scope;
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pic_value args, body, v;
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struct pic_irep *irep;
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pic_state *pic = state->pic;
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codegen_scope *prev_scope;
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struct pic_irep *prev_irep, *irep;
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pic_value body, v;
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irep = new_irep(pic);
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/* arguments */
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args = pic_car(pic, pic_cdr(pic, obj));
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new_scope = new_local_scope(pic, args, scope);
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/* inner environment */
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prev_irep = state->irep;
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prev_scope = state->scope;
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state->irep = irep = new_irep(pic);
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state->scope = new_local_scope(pic, pic_car(pic, pic_cdr(pic, obj)), state->scope);
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{
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/* body */
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body = pic_cdr(pic, pic_cdr(pic, obj));
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for (v = body; ! pic_nil_p(v); v = pic_cdr(pic, v)) {
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pic_gen(pic, irep, pic_car(pic, v), new_scope);
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pic_gen(state, pic_car(pic, v));
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irep->code[irep->clen].insn = OP_POP;
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irep->clen++;
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}
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irep->clen--;
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irep->code[irep->clen].insn = OP_RET;
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irep->clen++;
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}
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destroy_scope(pic, state->scope);
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destory_scope(pic, new_scope);
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state->irep = prev_irep;
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state->scope = prev_scope;
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#if VM_DEBUG
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printf("LAMBDA_%zd:\n", pic->ilen);
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@ -388,14 +424,10 @@ pic_gen_lambda(pic_state *pic, pic_value obj, codegen_scope *scope)
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struct pic_proc *
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pic_codegen(pic_state *pic, pic_value obj)
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{
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codegen_scope *global_scope;
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struct pic_proc *proc;
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struct pic_irep *irep;
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codegen_state *state;
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global_scope = new_global_scope(pic);
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irep = new_irep(pic);
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proc = pic_proc_new(pic, irep);
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state = new_codegen_state(pic);
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if (! pic->jmp) {
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jmp_buf jmp;
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@ -409,14 +441,15 @@ pic_codegen(pic_state *pic, pic_value obj)
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return NULL;
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}
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}
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pic_gen(pic, irep, obj, global_scope);
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irep->code[irep->clen].insn = OP_STOP;
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irep->clen++;
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pic_gen(state, obj);
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state->irep->code[state->irep->clen].insn = OP_STOP;
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state->irep->clen++;
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proc = pic_proc_new(pic, state->irep);
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destory_scope(pic, global_scope);
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destroy_codegen_state(pic, state);
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#if VM_DEBUG
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print_irep(pic, irep);
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print_irep(pic, proc->u.irep);
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#endif
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return proc;
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