diff options
| -rw-r--r-- | gen_code.c | 58 |
1 files changed, 33 insertions, 25 deletions
@@ -90,6 +90,24 @@ ptree *t; } +void gen_expr(ptree*); +void gen_arguments(t) +ptree *t; +{ + if (!t) + return; + if (t->type != LIST){ + GEN_EXPR(t) + fprintf(stdout, "pushq\t%s", *reg_ptr); + + fprintf(stdout, "\n##ARGUMENT BOUNDARY\n"); + return; + } + gen_arguments(t->r); + gen_arguments(t->l); +} + + /*Based on Dragon Book gen_code()*/ void gen_expr(t) ptree *t; @@ -123,69 +141,59 @@ ptree *t; case INUM: fprintf(stdout, "movq\t$%d, %s\n",t->attr.ival, *reg_ptr); break; + case FCALL: + break; default: fprintf(stdout, "movq OTHER"); } } /*case 1 * t has a right child with label 0*/ - else if(t->r && t->r->label == 0) { + else if(t->r && t->r && t->r->label == 0) { GEN_EXPR(t->l); - if (t->r && t->r->type == INT) { - fprintf(stdout, "op\t$%d,\n", t->r->attr.ival); - fprintf(stdout, "op\t$%d,%s\n", t->r->attr.ival, *reg_ptr); - } else { + if (t->r && t->r->type == REAL) { yyerror(FLOAT_ERROR); } + + gen_op(t); } /*case 2 * 1 <= t->l->label < t->r->label AND t->l->lable < reg_cnt*/ - else if ((t->l->label <= 1 && t->l->label < t->r->label) + else if (t->l && t->r + && (t->l->label <= 1 && t->l->label < t->r->label) && t->l->label < reg_cnt) { REG_SWAP GEN_EXPR(t->l); REG_POP GEN_EXPR(t->r); - fprintf(stdout, "op\t%s, %s\n", *(reg_ptr + 1), *reg_ptr); + gen_op(t); REG_PUSH REG_SWAP } /*case 3 * 1 <= t->r->label <= t->l->label */ - else if (t->r->label <= 1 && t->r->label <= t->l->label) { + else if (t->l && t->r && t->r->label <= 1 + && t->r->label <= t->l->label) { GEN_EXPR(t->l); REG_POP GEN_EXPR(t->r); - fprintf(stdout, "op\t%s, %s\n", *reg_ptr, *(reg_ptr + 1)); + gen_op(t); REG_PUSH } /*case 4 *t->l->label, t->r->label >= reg_cnt*/ - else if (t->l->label >= reg_cnt && t->r->label >= reg_cnt){ + else if (t->l && t->r && t->l->label >= reg_cnt + && t->r->label >= reg_cnt){ /*TODO implement case 4*/ yyerror("CASE 4 of gen_expr() NOT IMPLEMENTED\n"); } else { + print_tree(t); yyerror("NOT ONE OF DEFINED CASES [gen_expr()]\n"); } } -void gen_arguments(t) -ptree *t; -{ - if (t->type != LIST){ - GEN_EXPR(t) - fprintf(stdout, "pushq\t%s", *reg_ptr); - - fprintf(stdout, "\n##ARGUMENT BOUNDARY\n"); - return; - } - - gen_arguments(t->r); - gen_arguments(t->l); -} - void gen_statement(t) ptree *t; { |