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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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5
src/crypto/randomx/jit_compiler_x86.cpp
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@ -110,8 +110,6 @@ namespace randomx {
#define ADDR(x) ((uint8_t*)&x)
# endif
#define codePrefetchScratchpad ADDR(randomx_prefetch_scratchpad)
#define codePrefetchScratchpadEnd ADDR(randomx_prefetch_scratchpad_end)
#define codePrologue ADDR(randomx_program_prologue)
#define codeLoopBegin ADDR(randomx_program_loop_begin)
#define codeLoopLoad ADDR(randomx_program_loop_load)
@ -134,7 +132,6 @@ namespace randomx {
#define codeShhEnd ADDR(randomx_sshash_end)
#define codeShhInit ADDR(randomx_sshash_init)
#define prefetchScratchpadSize (codePrefetchScratchpadEnd - codePrefetchScratchpad)
#define prologueSize (codeLoopBegin - codePrologue)
#define loopLoadSize (codeLoopLoadXOP - codeLoopLoad)
#define loopLoadXOPSize (codeProgamStart - codeLoopLoadXOP)
@ -467,7 +464,7 @@ namespace randomx {
void JitCompilerX86::generateProgramEpilogue(Program& prog, ProgramConfiguration& pcfg) {
*(uint64_t*)(code + codePos) = 0xc03349c08b49ull + (static_cast<uint64_t>(pcfg.readReg0) << 16) + (static_cast<uint64_t>(pcfg.readReg1) << 40);
codePos += 6;
emit(RandomX_CurrentConfig.codePrefetchScratchpadTweaked, prefetchScratchpadSize, code, codePos);
emit(RandomX_CurrentConfig.codePrefetchScratchpadTweaked, RandomX_CurrentConfig.codePrefetchScratchpadTweakedSize, code, codePos);
memcpy(code + codePos, codeLoopStore, loopStoreSize);
codePos += loopStoreSize;