diff options
| -rw-r--r-- | gen_code.c | 82 |
1 files changed, 82 insertions, 0 deletions
@@ -90,6 +90,88 @@ ptree *t; } } +void gen_op(t, c) +ptree *t; +int c; +{ + if (!t) + yyerror("Not an tree (gen_op)\n"); + print_tree(t); + + switch (t->type) { + case ADDOP: + case MULOP: + switch (t->attr.opval) { + case ADD: + fprintf(stdout, "addq\t"); + if (c == 1) + goto case1; + goto case23; + break; + case SUB: + fprintf(stdout, "subq\t"); + if (c == 1) + goto case1; + goto case23; + break; + case MUL: + fprintf(stdout, "imulq\t"); + break; + case DIV: + fprintf(stdout, "idivq\t"); + break; + default: + fprintf(stderr, "OPVAL: %d\n", t->attr.opval); + } + break; + case SUB: + print_tree(t); + gen_load(t->l); + fprintf(stdout, "negq\t%s", *reg_ptr); + break; + case RELOP: + break; + default: + fprintf(stderr, "%d\n", t->type); + yyerror("Not an op\n"); + } + return; +case1: + /*Taken/addapted from gen_load*/ + switch (t->r->type) { + case ID: + fprintf(stdout, "%d(%%rbp), %s\n", + - t->r->attr.nval->offset * OFFSET_SIZE, *reg_ptr); + break; + case INUM: + fprintf(stdout, "$%d, %s\n",t->r->attr.ival, *reg_ptr); + break; + case FCALL: + STACK_SAVE + fprintf(stdout, "subq $%d, %%rsp\n", + t->r->l->attr.nval->func_info->argc + * OFFSET_SIZE); + gen_arguments(t->r->r); + + fprintf(stdout, "call\t%s\n", t->r->l->attr.nval->name); + fprintf(stdout, "movq\t%s,%d(%%rbp)\n", + *reg_ptr, + - t->r->l->attr.nval->offset * OFFSET_SIZE); + STACK_LOAD + fprintf(stdout, "%d(%%rbp),%s\n", + - t->r->l->attr.nval->offset * OFFSET_SIZE, + *reg_ptr); + break; + default: + fprintf(stdout, "movq OTHER\n"); + } + return; +case23: + fprintf(stdout, "%s, %s\n", *reg_ptr, *(reg_ptr - 1)); + return; +case4: + /*Case 4 not implemented*/ + return; } void gen_expr(ptree*); |