aus_sammelwut/paulchen/ublu/ss08/abgabe/codea/.svn/text-base/code_gen.c.svn-base

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include "code_gen.h"
   4
   5 void function_header(char *name) {
   6         printf("\t.globl %s\n\t.type %s, @function\n%s:\n", name, name, name);
   7 }
   8
   9 char *get_next_reg(char *name, int skip_reg) {
  10         char *reg_names[]={"rax", "r10", "r11", "r9", "r8", "rcx", "rdx", "rsi", "rdi"};
  11         int index, a;
  12         if(name==(char *)NULL) {
  13                 index=0;
  14         }
  15         else {
  16                 for(a=0;a<9;a++) {
  17                         if(!strcmp(name,reg_names[a])) {
  18                                 index=a+1;
  19                                 break;
  20                         }
  21                 }
  22         }
  23         if(skip_reg) {
  24                 index++;
  25         }
  26         return reg_names[index];
  27 }
  28
  29 char *get_param_reg(long number) {
  30         char *reg_names[]={"rdi", "rsi", "rdx", "rcx", "r8", "r9"};
  31         return reg_names[number-1];
  32 }
  33
  34 void ret(void) {
  35         printf("\tret\n");
  36 }
  37
  38 void move(char *src, char *dst) {
  39         if(strcmp(src,dst)) {
  40                 printf("\tmovq %%%s, %%%s\n",src,dst);
  41         }
  42 }
  43