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Optimized CFROUND

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This commit is contained in:
SChernykh 2020-01-22 20:11:00 +01:00
parent d342968211
commit 9f1753cc4f
5 changed files with 24 additions and 17 deletions
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23
src/crypto/randomx/jit_compiler_x86.cpp
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@ -400,7 +400,7 @@ namespace randomx {
*(uint32_t*)(code + codePos + 10) = RandomX_CurrentConfig.ScratchpadL3Mask64_Calculated;
*(uint32_t*)(code + codePos + 20) = RandomX_CurrentConfig.ScratchpadL3Mask64_Calculated;
if (hasAVX) {
uint32_t* p = (uint32_t*)(code + codePos + 32);
uint32_t* p = (uint32_t*)(code + codePos + 67);
*p = (*p & 0xFF000000U) | 0x0077F8C5U;
}
@ -1072,18 +1072,21 @@ namespace randomx {
uint8_t* const p = code;
int pos = codePos;
emit(REX_MOV_RR64, p, pos);
emitByte(0xc0 + instr.src, p, pos);
int rotate = (13 - (instr.getImm32() & 63)) & 63;
if (rotate != 0) {
emit(ROL_RAX, p, pos);
emitByte(rotate, p, pos);
}
const uint32_t src = instr.src;
*(uint32_t*)(p + pos) = 0x00C08B49 + (src << 16);
const int rotate = (static_cast<int>(instr.getImm32() & 63) - 2) & 63;
*(uint32_t*)(p + pos + 3) = 0x00C8C148 + (rotate << 24);
if (vm_flags & RANDOMX_FLAG_AMD) {
emit(AND_OR_MOV_LDMXCSR_RYZEN, p, pos);
*(uint64_t*)(p + pos + 7) = 0x742024443B0CE083ULL;
*(uint8_t*)(p + pos + 15) = 8;
*(uint64_t*)(p + pos + 16) = 0x202444890414AE0FULL;
pos += 24;
}
else {
emit(AND_OR_MOV_LDMXCSR, p, pos);
*(uint64_t*)(p + pos + 7) = 0x0414AE0F0CE083ULL;
pos += 14;
}
codePos = pos;