diff options
| author | Manman Ren <mren@apple.com> | 2012-06-26 19:47:59 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2012-06-26 19:47:59 +0000 |
| commit | 1f7a1b68a07ea6bdf521525a7928f4a8c5216713 (patch) | |
| tree | b575dce801938772f5cfd5bc9a8cbe5391474ccc /lib/Target/X86/Disassembler/X86Disassembler.cpp | |
| parent | ca578e7ba6b1e4ce955134e3fb1d5014942e5248 (diff) | |
X86: add GATHER intrinsics (AVX2) in LLVM
Support the following intrinsics:
llvm.x86.avx2.gather.d.pd, llvm.x86.avx2.gather.q.pd
llvm.x86.avx2.gather.d.pd.256, llvm.x86.avx2.gather.q.pd.256
llvm.x86.avx2.gather.d.ps, llvm.x86.avx2.gather.q.ps
llvm.x86.avx2.gather.d.ps.256, llvm.x86.avx2.gather.q.ps.256
Modified Disassembler to handle VSIB addressing mode.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159221 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/Disassembler/X86Disassembler.cpp')
| -rw-r--r-- | lib/Target/X86/Disassembler/X86Disassembler.cpp | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/lib/Target/X86/Disassembler/X86Disassembler.cpp b/lib/Target/X86/Disassembler/X86Disassembler.cpp index b13a00620b..b13e1ca41c 100644 --- a/lib/Target/X86/Disassembler/X86Disassembler.cpp +++ b/lib/Target/X86/Disassembler/X86Disassembler.cpp @@ -498,7 +498,30 @@ static bool translateRMMemory(MCInst &mcInst, InternalInstruction &insn, } else { baseReg = MCOperand::CreateReg(0); } - + + // Check whether we are handling VSIB addressing mode for GATHER. + // If sibIndex was set to SIB_INDEX_NONE, index offset is 4 and + // we should use SIB_INDEX_XMM4|YMM4 for VSIB. + // I don't see a way to get the correct IndexReg in readSIB: + // We can tell whether it is VSIB or SIB after instruction ID is decoded, + // but instruction ID may not be decoded yet when calling readSIB. + uint32_t Opcode = mcInst.getOpcode(); + bool IsGather = (Opcode == X86::VGATHERDPDrm || + Opcode == X86::VGATHERQPDrm || + Opcode == X86::VGATHERDPSrm || + Opcode == X86::VGATHERQPSrm); + bool IsGatherY = (Opcode == X86::VGATHERDPDYrm || + Opcode == X86::VGATHERQPDYrm || + Opcode == X86::VGATHERDPSYrm || + Opcode == X86::VGATHERQPSYrm); + if (IsGather || IsGatherY) { + unsigned IndexOffset = insn.sibIndex - + (insn.addressSize == 8 ? SIB_INDEX_RAX:SIB_INDEX_EAX); + SIBIndex IndexBase = IsGatherY ? SIB_INDEX_YMM0 : SIB_INDEX_XMM0; + insn.sibIndex = (SIBIndex)(IndexBase + + (insn.sibIndex == SIB_INDEX_NONE ? 4 : IndexOffset)); + } + if (insn.sibIndex != SIB_INDEX_NONE) { switch (insn.sibIndex) { default: @@ -509,6 +532,8 @@ static bool translateRMMemory(MCInst &mcInst, InternalInstruction &insn, indexReg = MCOperand::CreateReg(X86::x); break; EA_BASES_32BIT EA_BASES_64BIT + REGS_XMM + REGS_YMM #undef ENTRY } } else { |