diff options
Diffstat (limited to 'lib/Target/X86/X86CodeEmitter.cpp')
| -rw-r--r-- | lib/Target/X86/X86CodeEmitter.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/Target/X86/X86CodeEmitter.cpp b/lib/Target/X86/X86CodeEmitter.cpp index 5d72b44..0f9c562 100644 --- a/lib/Target/X86/X86CodeEmitter.cpp +++ b/lib/Target/X86/X86CodeEmitter.cpp @@ -985,8 +985,14 @@ void Emitter<CodeEmitter>::emitVEXOpcodePrefix(uint64_t TSFlags, if (X86II::isX86_64ExtendedReg(MI.getOperand(0).getReg())) VEX_R = 0x0; - if (HasVEX_4V) - VEX_4V = getVEXRegisterEncoding(MI, 1); + if (HasVEX_4V) { + if (HasMemOp4) + VEX_4V = getVEXRegisterEncoding(MI, 1); + else + // FMA3 instructions operands are dst, src1, src2, src3 + // dst and src1 are the same and not encoded separately + VEX_4V = getVEXRegisterEncoding(MI, 2); + } if (X86II::isX86_64ExtendedReg( MI.getOperand(MemOperand+X86::AddrBaseReg).getReg())) |