fzorb/REDACTED-rig
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Optimized CFROUND

Browse source 
Shorter version using BMI2 instructionns
This commit is contained in:
SChernykh 2020-02-21 19:00:58 +01:00
parent 12081e4f5b
commit 131085be80
3 changed files with 35 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

23
src/crypto/randomx/jit_compiler_x86.cpp
View file

@ -1118,6 +1118,29 @@ namespace randomx {
codePos = pos;
}
void JitCompilerX86::h_CFROUND_BMI2(const Instruction& instr) {
uint8_t* const p = code;
int pos = codePos;
const uint64_t src = instr.src;
const uint64_t rotate = (static_cast<int>(instr.getImm32() & 63) - 2) & 63;
*(uint64_t*)(p + pos) = 0xC0F0FBC3C4ULL | (src << 32) | (rotate << 40);
if (vm_flags & RANDOMX_FLAG_AMD) {
*(uint64_t*)(p + pos + 6) = 0x742024443B0CE083ULL;
*(uint8_t*)(p + pos + 14) = 8;
*(uint64_t*)(p + pos + 15) = 0x202444890414AE0FULL;
pos += 23;
}
else {
*(uint64_t*)(p + pos + 6) = 0x0414AE0F0CE083ULL;
pos += 13;
}
codePos = pos;
}
void JitCompilerX86::h_CBRANCH(const Instruction& instr) {
uint8_t* const p = code;
int pos = codePos;