Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Add register rename optimisation to dynarec to eliminate some redundant

Browse source 
UOP_MOVs.
This commit is contained in:
SarahW 2020-09-14 20:46:56 +01:00
commit 0d7103368a
3 changed files with 77 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

36
src/codegen_reg.c
View file

@ -671,6 +671,42 @@ ir_host_reg_t codegen_reg_alloc_write_reg(codeblock_t *block, ir_reg_t ir_reg)
return reg_set->reg_list[c].reg | IREG_GET_SIZE(ir_reg.reg);
}
void codegen_reg_rename(codeblock_t *block, ir_reg_t src, ir_reg_t dst)
{
host_reg_set_t *reg_set = get_reg_set(src);
int c;
int target;
// pclog("rename: %i.%i -> %i.%i\n", src.reg,src.version, dst.reg, dst.version);
/*Search for required register*/
for (c = 0; c < reg_set->nr_regs; c++)
{
if (!ir_reg_is_invalid(reg_set->regs[c]) && IREG_GET_REG(reg_set->regs[c].reg) == IREG_GET_REG(src.reg) && reg_set->regs[c].version == src.version)
break;
}
if (c == reg_set->nr_regs)
fatal("codegen_reg_rename: Can't find register to rename\n");
target = c;
if (reg_set->dirty[target])
codegen_reg_writeback(reg_set, block, target, 0);
reg_set->regs[target] = dst;
reg_set->dirty[target] = 1;
// pclog("renamed reg %i dest=%i.%i\n", target, dst.reg, dst.version);
/*Invalidate any stale copies of the dest register*/
for (c = 0; c < reg_set->nr_regs; c++)
{
if (c == target)
continue;
if (!ir_reg_is_invalid(reg_set->regs[c]) && IREG_GET_REG(reg_set->regs[c].reg) == IREG_GET_REG(dst.reg))
{
reg_set->regs[c] = invalid_ir_reg;
reg_set->dirty[c] = 0;
}
}
}
void codegen_reg_flush(ir_data_t *ir, codeblock_t *block)
{
host_reg_set_t *reg_set;