diff options
| -rw-r--r-- | gen_code.c | 38 |
1 files changed, 21 insertions, 17 deletions
@@ -225,23 +225,29 @@ ptree *t; default: fprintf(stdout, "movq OTHER"); } +} + + +/*Based on Dragon Book gen_code()*/ +void gen_expr(t) +ptree *t; +{ + if (!t) { + fprintf(stderr, "GEN_EXPR: NOT T\n"); + return; + } + + + + if (t->label == 0 || (t->type == FCALL || t->type == PCALL) + || t->type == SUB){ + gen_load(t); } /*case 0 * t is a left leaf*/ else if ((!t->r) && (!t->l) && t->label != 0) { /*TODO check if correct*/ - switch (t->type) { - case ID: - fprintf(stdout, "movq\t%s, %s\n",t->attr.nval->name, *reg_ptr); - break; - case INUM: - fprintf(stdout, "movq\t$%d, %s\n",t->attr.ival, *reg_ptr); - break; - case FCALL: - break; - default: - fprintf(stdout, "movq OTHER"); - } + gen_load(t); } /*case 1 * t has a right child with label 0*/ @@ -251,7 +257,7 @@ ptree *t; yyerror(FLOAT_ERROR); } - gen_op(t); + gen_op(t,1); } /*case 2 * 1 <= t->l->label < t->r->label AND t->l->lable < reg_cnt*/ @@ -260,7 +266,7 @@ ptree *t; && t->l->label < reg_cnt) { REG_SWAP - GEN_EXPR(t->l); + GEN_EXPR(t->l); /*REG S = reg_ptr - 1*/ REG_POP GEN_EXPR(t->r); gen_op(t); @@ -342,9 +348,7 @@ ptree *t; yyerror("Issue with statement code generation\n"); break; case IF: - if (t->l->l->ret_type == INT) { - fprintf(stderr, "IF (INT)\n"); - } else { + if (t->l->l->ret_type == REAL) { fprintf(stderr, "IF (REAL)\n"); yyerror(FLOAT_ERROR); } |