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Merge pull request #1303 from overlordxrz-source/fix/relinker-evex-grp3-immediate 

fix(relinker): do not add the F6/F7 TEST immediate to EVEX instructions
This commit is contained in:
Dean 2026-10-08 22:35:39 +13:00 committed by GitHub
parent b680d5adac f4ef1cd6ec
commit a753d0de45
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GPG Key ID: B5690EEEBB952194
2 changed files with 2 additions and 1 deletions
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2
core/relinker/codegen/src/x86/X64InstructionDecoder.cpp
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@ -283,7 +283,7 @@ std::size_t X64InstructionDecoder::Decode(const std::uint8_t* data, std::size_t
const auto reg = static_cast<std::uint8_t>((modrm >> ModRmRegShift) & ModRmRegMask);
const auto rm = static_cast<std::uint8_t>(modrm & ModRmRmMask);
if (!vexPresent && !twoByteOpcode &&
if (!vexPresent && !evexPresent && !twoByteOpcode &&
(opcode == OneByteTestGrp3Rm8 || opcode == OneByteTestGrp3Rm) &&
reg <= Grp3RegTestMax) {
immediateSize = (opcode == OneByteTestGrp3Rm8)

1
core/relinker/codegen/tests/Amd64OnlyConverterTests.cpp
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@ -127,6 +127,7 @@ void decoderLengths() {
{0xA0, 1, 2, 3, 4, 5, 6, 7, 8}, {0x48, 0xA1, 1, 2, 3, 4, 5, 6, 7, 8}, {0xA2, 1, 2, 3, 4, 5, 6, 7, 8},
{0x64, 0x48, 0xA3, 1, 2, 3, 4, 5, 6, 7, 8}, {0x67, 0xA1, 1, 2, 3, 4}, {0x48, 0x67, 0xA3, 1, 2, 3, 4},
{0x0F, 0x38, 0xCB, 0xCA}, {0x45, 0x0F, 0x38, 0xCC, 0xE1}, {0x0F, 0x38, 0xCD, 0x08}, {0x0F, 0x38, 0xCB, 0x0D, 0x10, 0x00, 0x00, 0x00},
{0x62, 0xF1, 0x75, 0x48, 0xF6, 0xC2}, {0x62, 0xF1, 0x7D, 0x48, 0xF6, 0x05, 0x10, 0x00, 0x00, 0x00}, {0x62, 0xF1, 0x6D, 0x48, 0xF6, 0x4C, 0x24, 0x01},
{0x0F, 0x3A, 0xCC, 0xD5, 0x03}, {0x45, 0x0F, 0x3A, 0xCC, 0xE1, 0x00}, {0x0F, 0x3A, 0xCC, 0x08, 0x01}, {0x0F, 0x38, 0xC8, 0xCA}, {0x0F, 0x38, 0xC9, 0xCA}, {0x0F, 0x38, 0xCA, 0x08},
{0x48, 0x66, 0xB8, 0x34, 0x12}, {0x66, 0x48, 0xB8, 1, 2, 3, 4, 5, 6, 7, 8}, {0x41, 0x48, 0xB8, 1, 2, 3, 4, 5, 6, 7, 8},
{0x66, 0x48, 0x81, 0xC0, 1, 2, 3, 4}, {0x66, 0x48, 0x05, 1, 2, 3, 4}, {0x66, 0x48, 0xC7, 0xC0, 1, 2, 3, 4},