#include <stdio.h>
#include <string.h>
+#include <stdlib.h>
#include "chelper.h"
#include "tree.h"
#define DDCHELP
#endif
+#define REGLEN 4
+static char *regs64[] = {"rax", "r10", "r11", "r9"};
+static char *regs8l[] = {"al", "r10b", "r11b", "r9b"};
+
void func_header(char *s)
{
printf("\t.globl %1$s\n\t.type %1$s, @function\n%1$s:\n", s);
void moveimm(long imm, char *dst)
{
char buf[100];
- sprintf(buf, "$%li", imm);
+ sprintf(buf, "$%d", imm);
printf("\tmovq %s, %%%s\n", buf, dst);
}
-void ret(void)
-{
- printf("\tret\n");
-}
-
-char *next_reg(char *s, short skip)
+char *next_reg(char *s, int params)
{
- /* TODO: bessere registerwahl. das is gerade a wengal suboptimal... */
-#if 1
- char *regs[] = {"rax", "r10", "r11", "rax"};
-#else
- char *regs[] = {"rax", "r10", "r11", "r9", "r8", "rcx", "rdx", "rsi", "rdi"};
-#endif
- int i=0;
+ int i = 0;
if (s != (char*) NULL) {
- while(i < 9) {
- if(!strcmp(s, regs[i++])) {
- break;
- }
+ while(strcmp(s, regs64[i]) != 0) {
+ i = (i+1) % REGLEN;
}
- }
- if(skip) {
- i++;
+ i = (i+1) % REGLEN;
}
#ifdef DDCHELP
- fprintf(stderr, "next_reg(): %s\n", regs[i]);
+ fprintf(stderr, "next_reg(): %s (bei %i parameter)\n", regs64[i], params);
#endif
+ return regs64[i];
+}
- return regs[i];
+char *reg_64to8l(char *s)
+{
+ int i = 0;
+ if (s != (char*) NULL) {
+ while(strcmp(s, regs64[i]) != 0) {
+ i = (i+1) % REGLEN;
+ }
+ return regs8l[i];
+ }
+ fprintf(stderr, "reg_64to8l(): sollte nicht passieren\n");
+ exit(4);
}
char *param_reg(int num)