diff options
Diffstat (limited to 'llvm/tools/llvm-exegesis/lib/X86/Target.cpp')
| -rw-r--r-- | llvm/tools/llvm-exegesis/lib/X86/Target.cpp | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/llvm/tools/llvm-exegesis/lib/X86/Target.cpp b/llvm/tools/llvm-exegesis/lib/X86/Target.cpp index 974b2c938c3..08724dd4152 100644 --- a/llvm/tools/llvm-exegesis/lib/X86/Target.cpp +++ b/llvm/tools/llvm-exegesis/lib/X86/Target.cpp @@ -439,7 +439,8 @@ struct ConstantInliner { std::vector<MCInst> popFlagAndFinalize(); - std::vector<MCInst> loadMXCSRAndFinalize(bool HasAVX); + std::vector<MCInst> loadImplicitRegAndFinalize(unsigned Opcode, + unsigned Value); private: ConstantInliner &add(const MCInst &Inst) { @@ -501,10 +502,11 @@ std::vector<MCInst> ConstantInliner::popFlagAndFinalize() { return std::move(Instructions); } -std::vector<MCInst> ConstantInliner::loadMXCSRAndFinalize(bool HasAVX) { +std::vector<MCInst> +ConstantInliner::loadImplicitRegAndFinalize(unsigned Opcode, unsigned Value) { add(allocateStackSpace(4)); - add(fillStackSpace(X86::MOV32mi, 0, 0x1f80)); // Mask all FP exceptions - add(MCInstBuilder(HasAVX ? X86::VLDMXCSR : X86::LDMXCSR) + add(fillStackSpace(X86::MOV32mi, 0, Value)); // Mask all FP exceptions + add(MCInstBuilder(Opcode) // Address = ESP .addReg(X86::RSP) // BaseReg .addImm(1) // ScaleAmt @@ -715,7 +717,11 @@ std::vector<MCInst> ExegesisX86Target::setRegTo(const MCSubtargetInfo &STI, if (Reg == X86::EFLAGS) return CI.popFlagAndFinalize(); if (Reg == X86::MXCSR) - return CI.loadMXCSRAndFinalize(STI.getFeatureBits()[X86::FeatureAVX]); + return CI.loadImplicitRegAndFinalize( + STI.getFeatureBits()[X86::FeatureAVX] ? X86::VLDMXCSR + : X86::LDMXCSR, 0x1f80); + if (Reg == X86::FPCW) + return CI.loadImplicitRegAndFinalize(X86::FLDCW16m, 0x37f); return {}; // Not yet implemented. } |
