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CompiledLightVirtualMachine

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This commit is contained in:
tevador
2019-03-21 20:44:59 +01:00
parent 1617d8e34e
commit 73a11f5c01
12 changed files with 451 additions and 12 deletions
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src/JitCompilerX86.cpp
+28 -4
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@@ -86,8 +86,10 @@ namespace RandomX {
const uint8_t* codeLoopLoad = (uint8_t*)&randomx_program_loop_load;
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* codeLoopStore = (uint8_t*)&randomx_program_loop_store;
const uint8_t* codeLoopEnd = (uint8_t*)&randomx_program_loop_end;
const uint8_t* codeReadDatasetLightSub = (uint8_t*)&randomx_program_read_dataset_light_sub;
const uint8_t* codeEpilogue = (uint8_t*)&randomx_program_epilogue;
const uint8_t* codeProgramEnd = (uint8_t*)&randomx_program_end;
@@ -95,10 +97,13 @@ namespace RandomX {
const int32_t epilogueSize = codeProgramEnd - codeEpilogue;
const int32_t loopLoadSize = codeProgamStart - codeLoopLoad;
const int32_t readDatasetSize = codeLoopStore - codeReadDataset;
const int32_t readDatasetSize = codeReadDatasetLight - codeReadDataset;
const int32_t readDatasetLightSize = codeLoopStore - codeReadDatasetLight;
const int32_t loopStoreSize = codeLoopEnd - codeLoopStore;
const int32_t readDatasetLightSubSize = codeEpilogue - codeReadDatasetLightSub;
const int32_t epilogueOffset = CodeSize - epilogueSize;
const int32_t readDatasetLightSubOffset = epilogueOffset - readDatasetLightSubSize;
static const uint8_t REX_ADD_RR[] = { 0x4d, 0x03 };
static const uint8_t REX_ADD_RM[] = { 0x4c, 0x03 };
@@ -168,6 +173,7 @@ namespace RandomX {
static const uint8_t REX_ANDPS_XMM12[] = { 0x45, 0x0F, 0x54, 0xE5, 0x45, 0x0F, 0x56, 0xE6 };
static const uint8_t REX_PADD[] = { 0x66, 0x44, 0x0f };
static const uint8_t PADD_OPCODES[] = { 0xfc, 0xfd, 0xfe, 0xd4 };
static const uint8_t CALL = 0xe8;
size_t JitCompilerX86::getCodeSize() {
return codePos - prologueSize;
@@ -176,10 +182,27 @@ namespace RandomX {
JitCompilerX86::JitCompilerX86() {
code = (uint8_t*)allocExecutableMemory(CodeSize);
memcpy(code, codePrologue, prologueSize);
memcpy(code + CodeSize - epilogueSize, codeEpilogue, epilogueSize);
memcpy(code + epilogueOffset, codeEpilogue, epilogueSize);
memcpy(code + readDatasetLightSubOffset, codeReadDatasetLightSub, readDatasetLightSubSize);
}
void JitCompilerX86::generateProgram(Program& prog) {
generateProgramPrologue(prog);
memcpy(code + codePos, codeReadDataset, readDatasetSize);
codePos += readDatasetSize;
generateProgramEpilogue(prog);
}
void JitCompilerX86::generateProgramLight(Program& prog) {
generateProgramPrologue(prog);
memcpy(code + codePos, codeReadDatasetLight, readDatasetLightSize);
codePos += readDatasetLightSize;
emitByte(CALL);
emit32(readDatasetLightSubOffset - (codePos + 4));
generateProgramEpilogue(prog);
}
void JitCompilerX86::generateProgramPrologue(Program& prog) {
auto addressRegisters = prog.getEntropy(12);
uint32_t readReg0 = 0 + (addressRegisters & 1);
addressRegisters >>= 1;
@@ -205,8 +228,9 @@ namespace RandomX {
emitByte(0xc0 + readReg2);
emit(REX_XOR_EAX);
emitByte(0xc0 + readReg3);
memcpy(code + codePos, codeReadDataset, readDatasetSize);
codePos += readDatasetSize;
}
void JitCompilerX86::generateProgramEpilogue(Program& prog) {
memcpy(code + codePos, codeLoopStore, loopStoreSize);
codePos += loopStoreSize;
emit(SUB_EBX);