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RandomX: added BMI2 version for scratchpad prefetch

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Saves 1 instruction and 1 byte in the main loop.
This commit is contained in:
SChernykh
2021-05-19 17:52:16 +02:00
parent 3ac8f6b23a
commit d443dd86f1
6 changed files with 38 additions and 13 deletions
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25
src/crypto/randomx/randomx.cpp
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@@ -177,10 +177,17 @@ RandomX_ConfigurationBase::RandomX_ConfigurationBase()
memcpy(codeReadDatasetRyzenTweaked, a, b - a);
codeReadDatasetRyzenTweakedSize = b - a;
}
{
const uint8_t* a = addr(randomx_prefetch_scratchpad);
if (xmrig::Cpu::info()->hasBMI2()) {
const uint8_t* a = addr(randomx_prefetch_scratchpad_bmi2);
const uint8_t* b = addr(randomx_prefetch_scratchpad_end);
memcpy(codePrefetchScratchpadTweaked, a, b - a);
codePrefetchScratchpadTweakedSize = b - a;
}
else {
const uint8_t* a = addr(randomx_prefetch_scratchpad);
const uint8_t* b = addr(randomx_prefetch_scratchpad_bmi2);
memcpy(codePrefetchScratchpadTweaked, a, b - a);
codePrefetchScratchpadTweakedSize = b - a;
}
# endif
}
@@ -217,13 +224,15 @@ void RandomX_ConfigurationBase::Apply()
//*(uint32_t*)(codeReadDatasetTweaked + 24) = DatasetBaseMask;
//*(uint32_t*)(codeReadDatasetLightSshInitTweaked + 59) = DatasetBaseMask;
*(uint32_t*)(codePrefetchScratchpadTweaked + 4) = ScratchpadL3Mask64_Calculated;
*(uint32_t*)(codePrefetchScratchpadTweaked + 18) = ScratchpadL3Mask64_Calculated;
const bool hasBMI2 = xmrig::Cpu::info()->hasBMI2();
*(uint32_t*)(codePrefetchScratchpadTweaked + (hasBMI2 ? 7 : 4)) = ScratchpadL3Mask64_Calculated;
*(uint32_t*)(codePrefetchScratchpadTweaked + (hasBMI2 ? 17 : 18)) = ScratchpadL3Mask64_Calculated;
// Apply scratchpad prefetch mode
{
uint32_t* a = (uint32_t*)(codePrefetchScratchpadTweaked + 8);
uint32_t* b = (uint32_t*)(codePrefetchScratchpadTweaked + 22);
uint32_t* a = (uint32_t*)(codePrefetchScratchpadTweaked + (hasBMI2 ? 11 : 8));
uint32_t* b = (uint32_t*)(codePrefetchScratchpadTweaked + (hasBMI2 ? 21 : 22));
switch (scratchpadPrefetchMode)
{
@@ -290,7 +299,7 @@ typedef void(randomx::JitCompilerX86::* InstructionGeneratorX86_2)(const randomx
INST_HANDLE(IMUL_M, IMUL_R);
#if defined(_M_X64) || defined(__x86_64__)
if (xmrig::Cpu::info()->hasBMI2()) {
if (hasBMI2) {
INST_HANDLE2(IMULH_R, IMULH_R_BMI2, IMUL_M);
INST_HANDLE2(IMULH_M, IMULH_M_BMI2, IMULH_R);
}
@@ -332,7 +341,7 @@ typedef void(randomx::JitCompilerX86::* InstructionGeneratorX86_2)(const randomx
#endif
#if defined(_M_X64) || defined(__x86_64__)
if (xmrig::Cpu::info()->hasBMI2()) {
if (hasBMI2) {
INST_HANDLE2(CFROUND, CFROUND_BMI2, CBRANCH);
}
else