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Reworked SuperscalarHash instruction set

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ASM and C code generator for SuperscalarHash
Support for Superscalar hash in the light mode
This commit is contained in:
tevador
2019-04-07 15:38:51 +02:00
parent 6e3136b37f
commit b4c02051fa
16 changed files with 505 additions and 212 deletions
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src/JitCompilerX86.cpp
+114 -7
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@@ -87,6 +87,7 @@ namespace RandomX {
*/
#include "JitCompilerX86-static.hpp"
#include "LightProgramGenerator.hpp"
#define NOP_TEST true
@@ -96,6 +97,8 @@ namespace RandomX {
const uint8_t* codeProgamStart = (uint8_t*)&randomx_program_start;
const uint8_t* codeReadDataset = (uint8_t*)&randomx_program_read_dataset;
const uint8_t* codeReadDatasetLight = (uint8_t*)&randomx_program_read_dataset_light;
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;
const uint8_t* codeLoopStore = (uint8_t*)&randomx_program_loop_store;
const uint8_t* codeLoopEnd = (uint8_t*)&randomx_program_loop_end;
@@ -110,7 +113,9 @@ namespace RandomX {
const int32_t prologueSize = codeLoopBegin - codePrologue;
const int32_t loopLoadSize = codeProgamStart - codeLoopLoad;
const int32_t readDatasetSize = codeReadDatasetLight - codeReadDataset;
const int32_t readDatasetLightSize = codeLoopStore - codeReadDatasetLight;
const int32_t readDatasetLightSize = codeReadDatasetLightSshInit - codeReadDatasetLight;
const int32_t readDatasetLightInitSize = codeReadDatasetLightSshFin - codeReadDatasetLightSshInit;
const int32_t readDatasetLightFinSize = codeLoopStore - codeReadDatasetLightSshFin;
const int32_t loopStoreSize = codeLoopEnd - codeLoopStore;
const int32_t readDatasetLightSubSize = codeDatasetInit - codeReadDatasetLightSub;
const int32_t datasetInitSize = codeEpilogue - codeDatasetInit;
@@ -199,7 +204,7 @@ namespace RandomX {
static const uint8_t NOP1[] = { 0x90 };
static const uint8_t NOP2[] = { 0x66, 0x90 };
static const uint8_t NOP3[] = { 0x0F, 0x1F, 0x00 };
static const uint8_t NOP3[] = { 0x66, 0x66, 0x90 };
static const uint8_t NOP4[] = { 0x0F, 0x1F, 0x40, 0x00 };
static const uint8_t NOP5[] = { 0x0F, 0x1F, 0x44, 0x00, 0x00 };
static const uint8_t NOP6[] = { 0x66, 0x0F, 0x1F, 0x44, 0x00, 0x00 };
@@ -230,19 +235,31 @@ namespace RandomX {
generateProgramEpilogue(prog);
}
template<bool superscalar>
void JitCompilerX86::generateProgramLight(Program& prog) {
if (RANDOMX_CACHE_ACCESSES != 8)
throw std::runtime_error("JIT compiler: Unsupported value of RANDOMX_CACHE_ACCESSES");
if (RANDOMX_ARGON_GROWTH != 0)
throw std::runtime_error("JIT compiler: Unsupported value of RANDOMX_ARGON_GROWTH");
generateProgramPrologue(prog);
memcpy(code + codePos, codeReadDatasetLight, readDatasetLightSize);
codePos += readDatasetLightSize;
emitByte(CALL);
emit32(readDatasetLightSubOffset - (codePos + 4));
if (superscalar) {
emit(codeReadDatasetLightSshInit, readDatasetLightInitSize);
emitByte(CALL);
emit32(superScalarHashOffset - (codePos + 4));
emit(codeReadDatasetLightSshFin, readDatasetLightFinSize);
}
else {
memcpy(code + codePos, codeReadDatasetLight, readDatasetLightSize);
codePos += readDatasetLightSize;
emitByte(CALL);
emit32(readDatasetLightSubOffset - (codePos + 4));
}
generateProgramEpilogue(prog);
}
template void JitCompilerX86::generateProgramLight<true>(Program& prog);
template void JitCompilerX86::generateProgramLight<false>(Program& prog);
template<size_t N>
void JitCompilerX86::generateSuperScalarHash(LightProgram(&programs)[N]) {
memcpy(code + superScalarHashOffset, codeShhInit, codeSshInitSize);
@@ -253,7 +270,7 @@ namespace RandomX {
Instruction& instr = prog(i);
instr.src %= RegistersCount;
instr.dst %= RegistersCount;
generateCode(instr, i);
generateCode<LightProgram>(instr, i);
}
emit(codeShhLoad, codeSshLoadSize);
if (j < N - 1) {
@@ -318,6 +335,7 @@ namespace RandomX {
emit32(epilogueOffset - codePos - 4);
}
template<class P>
void JitCompilerX86::generateCode(Instruction& instr, int i) {
#ifdef RANDOMX_JUMP
instructionOffsets.push_back(codePos);
@@ -326,6 +344,95 @@ namespace RandomX {
(this->*generator)(instr, i);
}
template<>
void JitCompilerX86::generateCode<LightProgram>(Instruction& instr, int i) {
switch (instr.opcode)
{
case RandomX::LightInstructionType::ISUB_R:
emit(REX_SUB_RR);
emitByte(0xc0 + 8 * instr.dst + instr.src);
break;
case RandomX::LightInstructionType::IXOR_R:
emit(REX_XOR_RR);
emitByte(0xc0 + 8 * instr.dst + instr.src);
break;
case RandomX::LightInstructionType::IADD_RS:
emit(REX_LEA);
emitByte(0x04 + 8 * instr.dst);
genSIB(instr.mod % 4, instr.src, instr.dst);
break;
case RandomX::LightInstructionType::IMUL_R:
emit(REX_IMUL_RR);
emitByte(0xc0 + 8 * instr.dst + instr.src);
break;
case RandomX::LightInstructionType::IROR_C:
emit(REX_ROT_I8);
emitByte(0xc8 + instr.dst);
emitByte(instr.getImm32() & 63);
break;
case RandomX::LightInstructionType::IADD_C7:
emit(REX_81);
emitByte(0xc0 + instr.dst);
emit32(instr.getImm32());
break;
case RandomX::LightInstructionType::IXOR_C7:
emit(REX_XOR_RI);
emitByte(0xf0 + instr.dst);
emit32(instr.getImm32());
break;
case RandomX::LightInstructionType::IADD_C8:
emit(REX_81);
emitByte(0xc0 + instr.dst);
emit32(instr.getImm32());
emit(NOP1);
break;
case RandomX::LightInstructionType::IXOR_C8:
emit(REX_XOR_RI);
emitByte(0xf0 + instr.dst);
emit32(instr.getImm32());
emit(NOP1);
break;
case RandomX::LightInstructionType::IADD_C9:
emit(REX_81);
emitByte(0xc0 + instr.dst);
emit32(instr.getImm32());
emit(NOP2);
break;
case RandomX::LightInstructionType::IXOR_C9:
emit(REX_XOR_RI);
emitByte(0xf0 + instr.dst);
emit32(instr.getImm32());
emit(NOP2);
break;
case RandomX::LightInstructionType::IMULH_R:
emit(REX_MOV_RR64);
emitByte(0xc0 + instr.dst);
emit(REX_MUL_R);
emitByte(0xe0 + instr.src);
emit(REX_MOV_R64R);
emitByte(0xc2 + 8 * instr.dst);
break;
case RandomX::LightInstructionType::ISMULH_R:
emit(REX_MOV_RR64);
emitByte(0xc0 + instr.dst);
emit(REX_MUL_R);
emitByte(0xe8 + instr.src);
emit(REX_MOV_R64R);
emitByte(0xc2 + 8 * instr.dst);
break;
case RandomX::LightInstructionType::IMUL_RCP:
emit(MOV_RAX_I);
emit64(reciprocal(instr.getImm32()));
emit(REX_IMUL_RM);
emitByte(0xc0 + 8 * instr.dst);
break;
default:
UNREACHABLE;
}
}
template void JitCompilerX86::generateCode<Program>(Instruction& instr, int i);
void JitCompilerX86::genAddressReg(Instruction& instr, bool rax = true) {
emit(REX_MOV_RR);
emitByte((rax ? 0xc0 : 0xc8) + instr.src);