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

Add dynarec optimisation for UOP_MOV_IMM, to avoid register allocation

Browse source 
if the destination register won't be immediately used again.
This commit is contained in:
SarahW 2020-09-16 20:47:12 +01:00
commit 25fe224ea9
12 changed files with 216 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

62
src/codegen_reg.c
View file

@ -449,6 +449,45 @@ static void codegen_reg_writeback(host_reg_set_t *reg_set, codeblock_t *block, i
reg_set->dirty[c] = 0;
}
#ifdef CODEGEN_BACKEND_HAS_MOV_IMM
void codegen_reg_write_imm(codeblock_t *block, ir_reg_t ir_reg, uint32_t imm_data)
{
int reg_idx = IREG_GET_REG(ir_reg.reg);
void *p = ireg_data[reg_idx].p;
switch (ireg_data[reg_idx].native_size)
{
case REG_BYTE:
if ((uintptr_t)p < 256)
fatal("codegen_reg_write_imm - REG_BYTE %p\n", p);
codegen_direct_write_8_imm(block, p, imm_data);
break;
case REG_WORD:
if ((uintptr_t)p < 256)
fatal("codegen_reg_write_imm - REG_WORD %p\n", p);
codegen_direct_write_16_imm(block, p, imm_data);
break;
case REG_DWORD:
if ((uintptr_t)p < 256)
codegen_direct_write_32_imm_stack(block, (int)p, imm_data);
else
codegen_direct_write_32_imm(block, p, imm_data);
break;
case REG_POINTER:
case REG_QWORD:
case REG_DOUBLE:
case REG_FPU_ST_BYTE:
case REG_FPU_ST_QWORD:
case REG_FPU_ST_DOUBLE:
default:
fatal("codegen_reg_write_imm - native_size=%i\n", ireg_data[reg_idx].native_size);
}
}
#endif
static void alloc_reg(ir_reg_t ir_reg)
{
host_reg_set_t *reg_set = get_reg_set(ir_reg);
@ -671,6 +710,29 @@ 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);
}
#ifdef CODEGEN_BACKEND_HAS_MOV_IMM
int codegen_reg_is_loaded(ir_reg_t ir_reg)
{
host_reg_set_t *reg_set = get_reg_set(ir_reg);
int c;
/*Search for previous version in host 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(ir_reg.reg))
{
if (reg_set->regs[c].version <= ir_reg.version-1)
{
if (reg_version[IREG_GET_REG(reg_set->regs[c].reg)][reg_set->regs[c].version].refcount != 0)
fatal("codegen_reg_alloc_write_reg - previous version refcount != 0\n");
return 1;
}
}
}
return 0;
}
#endif
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);