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JIT compiler tweaks

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This commit is contained in:
SChernykh 2020-01-06 13:57:48 +01:00
parent f69ba3ea1d
commit eb20dfbc94
1 changed files with 19 additions and 33 deletions
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52
src/crypto/randomx/jit_compiler_x86.cpp
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@ -407,9 +407,10 @@ namespace randomx {
}
for (int i = 0, n = static_cast<int>(RandomX_CurrentConfig.ProgramSize); i < n; ++i) {
Instruction instr = prog(i);
Instruction& instr = prog(i);
const uint8_t opcode = instr.opcode;
*((uint64_t*)&instr) &= (uint64_t(-1) - (0xFFFF << 8)) | ((RegistersCount - 1) << 8) | ((RegistersCount - 1) << 16);
(this->*(engine[instr.opcode]))(instr);
(this->*(engine[opcode]))(instr);
}
emit(REX_MOV_RR, code, codePos);
@ -605,32 +606,22 @@ namespace randomx {
codePos = pos;
}
static const uint32_t template_IADD_M[8] = {
0x0604034c,
0x060c034c,
0x0614034c,
0x061c034c,
0x0624034c,
0x062c034c,
0x0634034c,
0x063c034c,
};
void JitCompilerX86::h_IADD_M(const Instruction& instr) {
uint8_t* const p = code;
int pos = codePos;
if (instr.src != instr.dst) {
const uint32_t dst = instr.dst;
if (instr.src != dst) {
genAddressReg<true>(instr, p, pos);
emit32(template_IADD_M[instr.dst], p, pos);
emit32(0x0604034c + (dst << 19), p, pos);
}
else {
emit(REX_ADD_RM, p, pos);
emitByte(0x86 + 8 * instr.dst, p, pos);
emitByte(0x86 + (dst << 3), p, pos);
genAddressImm(instr, p, pos);
}
registerUsage[instr.dst] = pos;
registerUsage[dst] = pos;
codePos = pos;
}
@ -660,19 +651,18 @@ namespace randomx {
uint8_t* const p = code;
int pos = codePos;
if (instr.src != instr.dst) {
const uint32_t dst = instr.dst;
if (instr.src != dst) {
genAddressReg<true>(instr, p, pos);
emit(REX_SUB_RM, p, pos);
emitByte(0x04 + 8 * instr.dst, p, pos);
emitByte(0x06, p, pos);
emit32(0x06042b4c + (dst << 19), p, pos);
}
else {
emit(REX_SUB_RM, p, pos);
emitByte(0x86 + 8 * instr.dst, p, pos);
emitByte(0x86 + (dst << 3), p, pos);
genAddressImm(instr, p, pos);
}
registerUsage[instr.dst] = pos;
registerUsage[dst] = pos;
codePos = pos;
}
@ -1060,14 +1050,12 @@ namespace randomx {
}
}
emit(REX_ADD_I, p, pos);
emitByte(0xc0 + reg, p, pos);
*(uint32_t*)(p + pos) = 0x00c08149 + (reg << 16);
const int shift = instr.getModCond() + RandomX_CurrentConfig.JumpOffset;
const uint32_t imm = (instr.getImm32() | (1UL << shift)) & ~(1UL << (shift - 1));
emit32(imm, p, pos);
emit(REX_TEST, p, pos);
emitByte(0xc0 + reg, p, pos);
emit32(RandomX_CurrentConfig.ConditionMask_Calculated << shift, p, pos);
*(uint32_t*)(p + pos + 3) = (instr.getImm32() | (1UL << shift)) & ~(1UL << (shift - 1));
*(uint32_t*)(p + pos + 7) = 0x00c0f749 + (reg << 16);
*(uint32_t*)(p + pos + 10) = RandomX_CurrentConfig.ConditionMask_Calculated << shift;
pos += 14;
if (jmp_offset >= -128) {
emitByte(JZ_SHORT, p, pos);
@ -1094,9 +1082,7 @@ namespace randomx {
int pos = codePos;
genAddressRegDst(instr, p, pos);
emit(REX_MOV_MR, p, pos);
emitByte(0x04 + 8 * instr.src, p, pos);
emitByte(0x06, p, pos);
emit32(0x0604894c + (static_cast<uint32_t>(instr.src) << 19), p, pos);
codePos = pos;
}