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Optimized dataset read for Ryzen CPUs

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Removed register dependency in dataset read, +0.8% speedup on average.
This commit is contained in:
SChernykh 2019-12-08 16:14:02 +01:00
parent 4dec063472
commit d0df824599
17 changed files with 81 additions and 20 deletions
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20
src/crypto/randomx/jit_compiler_x86.cpp
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@ -89,7 +89,6 @@ namespace randomx {
const uint8_t* codeLoopBegin = (uint8_t*)&randomx_program_loop_begin;
const uint8_t* codeLoopLoad = (uint8_t*)&randomx_program_loop_load;
const uint8_t* codeProgamStart = (uint8_t*)&randomx_program_start;
const uint8_t* codeReadDataset = (uint8_t*)&randomx_program_read_dataset;
const uint8_t* codeReadDatasetLightSshInit = (uint8_t*)&randomx_program_read_dataset_sshash_init;
const uint8_t* codeReadDatasetLightSshFin = (uint8_t*)&randomx_program_read_dataset_sshash_fin;
const uint8_t* codeDatasetInit = (uint8_t*)&randomx_dataset_init;
@ -105,7 +104,6 @@ namespace randomx {
const int32_t prefetchScratchpadSize = codePrefetchScratchpadEnd - codePrefetchScratchpad;
const int32_t prologueSize = codeLoopBegin - codePrologue;
const int32_t loopLoadSize = codeProgamStart - codeLoopLoad;
const int32_t readDatasetSize = codeReadDatasetLightSshInit - codeReadDataset;
const int32_t readDatasetLightInitSize = codeReadDatasetLightSshFin - codeReadDatasetLightSshInit;
const int32_t readDatasetLightFinSize = codeLoopStore - codeReadDatasetLightSshFin;
const int32_t loopStoreSize = codeLoopEnd - codeLoopStore;
@ -301,10 +299,22 @@ namespace randomx {
freePagedMemory(allocatedCode, CodeSize);
}
void JitCompilerX86::generateProgram(Program& prog, ProgramConfiguration& pcfg) {
void JitCompilerX86::generateProgram(Program& prog, ProgramConfiguration& pcfg, uint32_t flags) {
generateProgramPrologue(prog, pcfg);
memcpy(code + codePos, RandomX_CurrentConfig.codeReadDatasetTweaked, readDatasetSize);
codePos += readDatasetSize;
uint8_t* p;
uint32_t n;
if (flags & RANDOMX_FLAG_RYZEN) {
p = RandomX_CurrentConfig.codeReadDatasetRyzenTweaked;
n = RandomX_CurrentConfig.codeReadDatasetRyzenTweakedSize;
}
else {
p = RandomX_CurrentConfig.codeReadDatasetTweaked;
n = RandomX_CurrentConfig.codeReadDatasetTweakedSize;
}
memcpy(code + codePos, p, n);
codePos += n;
generateProgramEpilogue(prog, pcfg);
}