need_stack = (vars || parms) && call;
if(need_stack) {
- printf("\tenter $%d, $0\n", 8*(vars + parms + 2 /* fuer rax und r10 */));
+ /* save the link register */
+ printf("\tmflr 0; stw 0,-8(1)\n");
+ /* create the stack */
+ printf("\tstwu 1, -80(1)\n");
}
}
void func_footer(void)
{
- if(need_stack)
- printf("\tleave\n");
+ if(need_stack) {
+ /* remove stack frame */
+ printf("\taddi 1,1,80\n");
+ /* restore link register */
+ printf("\tlwz 0,-8(1); mtlr 0\n");
+ }
printf("\tblr\n\n\n");
}
{
if(src == (char*) NULL) return;
if(strcmp(src,dst) != 0) {
- printf("\tmr %s, %s\n", dst, src);
+ printf("\tmr %s,%s\n", dst, src);
}
}
void moveimm(long imm, char *dst)
{
- /* TODO: 32 bits... */
- printf("\taddi %s,0,%d\n", dst, imm);
+ if((imm > 65536-1) || (imm < -65536)) {
+ /* high word */
+ printf("\tlis %s,%d@ha\n", dst, imm);
+ /* low word */
+ printf("\taddi %s,%s,%d@l\n", dst, dst, imm);
+ } else {
+ /* just low word */
+ printf("\tli %s,%d@l\n", dst, imm);
+ }
}
char *next_reg(char *s, int params)
char *param_reg(int num)
{
- char *regs[] = {"3", "4", "5", "6", "7", "8", "9"};
+ char *regs[] = {"3", "4", "5", "6", "7", "8", "9", "10"};
return regs[num];
}