diff options
| -rw-r--r-- | gen_code.c | 28 |
1 files changed, 28 insertions, 0 deletions
@@ -1,7 +1,22 @@ #include <stdio.h> +#include <stdlib.h> +#include <assert.h> #include "gen_code.h" #include "pc.h" +#define REG_SWAP {\ + char *tmp_reg_swap = *reg_ptr;\ + *reg_ptr = *(reg_ptr + 1);\ + *(reg_ptr + 1) = tmp_reg_swap;\ +} +#define REG_POP {if (reg_cnt > 0) reg_ptr++, reg_cnt--;\ + else yyerror("CAN'T POP");} +#define REG_PUSH {if (reg_cnt < 13) reg_ptr--, reg_cnt++;\ + else yyerror("CAN'T PUSH");} + +char **reg_stack, **reg_ptr; +int reg_cnt; + int gen_label(t) ptree *t; { @@ -107,6 +122,19 @@ void gen_code(t, name) ptree *t; char *name; { + reg_stack = malloc(13 * sizeof(char*)); + assert(reg_stack); + reg_stack[0] = "RAX"; reg_stack[1] = "RCX"; + reg_stack[2] = "RDX"; reg_stack[3] = "RSI"; + reg_stack[4] = "RDI"; reg_stack[5] = "R8"; + reg_stack[6] = "R9"; reg_stack[7] = "R10"; + reg_stack[8] = "R11"; reg_stack[9] = "R12"; + reg_stack[10] = "R13"; reg_stack[11] = "R14"; + reg_stack[12] = "R15"; + + reg_ptr = reg_stack; + reg_cnt = 13; + fprintf(stdout, "\n.globl %s\n", name); fprintf(stdout, ".type %s, @function\n%s:\n", name, name); |