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NDR: For barrier micro-ops, lazily mark written registers instead of iterating

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Also remove some dead code in there.

4-5% more improvement observed.
This commit is contained in:
Cacodemon345
2025-05-06 16:25:09 +06:00
parent 864e01b0e2
commit aafd2f22f5
4 changed files with 62 additions and 34 deletions
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19
src/codegen_new/codegen_reg.h
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@@ -278,6 +278,7 @@ ireg_seg_limit_high(x86seg *seg)
}
extern uint8_t reg_last_version[IREG_COUNT];
extern uint64_t dirty_ir_regs[2];
/*This version of the register must be calculated, regardless of whether it is
apparently required or not. Do not optimise out.*/
@@ -362,10 +363,12 @@ codegen_reg_write(int reg, int uop_nr)
int last_version = reg_last_version[IREG_GET_REG(reg)];
reg_version_t *version;
#ifndef RELEASE_BUILD
if (IREG_GET_REG(reg) == IREG_INVALID)
fatal("codegen_reg_write - IREG_INVALID\n");
#endif
if (dirty_ir_regs[(IREG_GET_REG(reg) >> 6) & 3] & (1ull << ((uint64_t)IREG_GET_REG(reg) & 0x3full))) {
dirty_ir_regs[(IREG_GET_REG(reg) >> 6) & 3] &= ~(1ull << ((uint64_t)IREG_GET_REG(reg) & 0x3full));
if ((IREG_GET_REG(reg) > IREG_EBX && IREG_GET_REG(reg) < IREG_temp0) && last_version > 0) {
reg_version[IREG_GET_REG(reg)][last_version].flags |= REG_FLAGS_REQUIRED;
}
}
ireg.reg = reg;
ireg.version = last_version + 1;
@@ -375,12 +378,8 @@ codegen_reg_write(int reg, int uop_nr)
}
reg_last_version[IREG_GET_REG(reg)]++;
#ifndef RELEASE_BUILD
if (!reg_last_version[IREG_GET_REG(reg)])
fatal("codegen_reg_write - version overflow\n");
else
#endif
if (reg_last_version[IREG_GET_REG(reg)] > REG_VERSION_MAX)
if (reg_last_version[IREG_GET_REG(reg)] > REG_VERSION_MAX)
CPU_BLOCK_END();
if (reg_last_version[IREG_GET_REG(reg)] > max_version_refcount)
max_version_refcount = reg_last_version[IREG_GET_REG(reg)];