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2e363ece75c005db692582c543c2759ffe0ab3ca
llvm-6502/lib/Target/X86/InstPrinter/X86InstComments.cpp
Chandler Carruth 08780d4c1d [x86] Teach the x86 DAG combiner to form MOVSLDUP and MOVSHDUP 
instructions when it finds an appropriate pattern.

These are lovely instructions, and its a shame to not use them. =] They
are fast, and can hand loads folded into their operands, etc.

I've also plumbed the comment shuffle decoding through the various
layers so that the test cases are printed nicely.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217758 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-15 11:15:23 +00:00

650 lines
23 KiB
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//===-- X86InstComments.cpp - Generate verbose-asm comments for instrs ----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This defines functionality used to emit comments about X86 instructions to
// an output stream for -fverbose-asm.
//
//===----------------------------------------------------------------------===//
#include "X86InstComments.h"
#include "MCTargetDesc/X86MCTargetDesc.h"
#include "Utils/X86ShuffleDecode.h"
#include "llvm/MC/MCInst.h"
#include "llvm/CodeGen/MachineValueType.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
// Top Level Entrypoint
//===----------------------------------------------------------------------===//
/// EmitAnyX86InstComments - This function decodes x86 instructions and prints
/// newline terminated strings to the specified string if desired. This
/// information is shown in disassembly dumps when verbose assembly is enabled.
bool llvm::EmitAnyX86InstComments(const MCInst *MI, raw_ostream &OS,
const char *(*getRegName)(unsigned)) {
// If this is a shuffle operation, the switch should fill in this state.
SmallVector<int, 8> ShuffleMask;
const char *DestName = nullptr, *Src1Name = nullptr, *Src2Name = nullptr;
switch (MI->getOpcode()) {
default:
// Not an instruction for which we can decode comments.
return false;
case X86::BLENDPDrri:
case X86::VBLENDPDrri:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::BLENDPDrmi:
case X86::VBLENDPDrmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodeBLENDMask(MVT::v2f64,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VBLENDPDYrri:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VBLENDPDYrmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodeBLENDMask(MVT::v4f64,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::BLENDPSrri:
case X86::VBLENDPSrri:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::BLENDPSrmi:
case X86::VBLENDPSrmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodeBLENDMask(MVT::v4f32,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VBLENDPSYrri:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VBLENDPSYrmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodeBLENDMask(MVT::v8f32,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::PBLENDWrri:
case X86::VPBLENDWrri:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::PBLENDWrmi:
case X86::VPBLENDWrmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodeBLENDMask(MVT::v8i16,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::INSERTPSrr:
case X86::VINSERTPSrr:
DestName = getRegName(MI->getOperand(0).getReg());
Src1Name = getRegName(MI->getOperand(1).getReg());
Src2Name = getRegName(MI->getOperand(2).getReg());
if(MI->getOperand(3).isImm())
DecodeINSERTPSMask(MI->getOperand(3).getImm(), ShuffleMask);
break;
case X86::MOVLHPSrr:
case X86::VMOVLHPSrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeMOVLHPSMask(2, ShuffleMask);
break;
case X86::MOVHLPSrr:
case X86::VMOVHLPSrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeMOVHLPSMask(2, ShuffleMask);
break;
case X86::MOVSLDUPrr:
case X86::VMOVSLDUPrr:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::MOVSLDUPrm:
case X86::VMOVSLDUPrm:
DestName = getRegName(MI->getOperand(0).getReg());
DecodeMOVSLDUPMask(MVT::v4f32, ShuffleMask);
break;
case X86::VMOVSHDUPYrr:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::VMOVSHDUPYrm:
DestName = getRegName(MI->getOperand(0).getReg());
DecodeMOVSHDUPMask(MVT::v8f32, ShuffleMask);
break;
case X86::VMOVSLDUPYrr:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::VMOVSLDUPYrm:
DestName = getRegName(MI->getOperand(0).getReg());
DecodeMOVSLDUPMask(MVT::v8f32, ShuffleMask);
break;
case X86::MOVSHDUPrr:
case X86::VMOVSHDUPrr:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::MOVSHDUPrm:
case X86::VMOVSHDUPrm:
DestName = getRegName(MI->getOperand(0).getReg());
DecodeMOVSHDUPMask(MVT::v4f32, ShuffleMask);
break;
case X86::PALIGNR128rr:
case X86::VPALIGNR128rr:
Src1Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::PALIGNR128rm:
case X86::VPALIGNR128rm:
Src2Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodePALIGNRMask(MVT::v16i8,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
break;
case X86::VPALIGNR256rr:
Src1Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VPALIGNR256rm:
Src2Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodePALIGNRMask(MVT::v32i8,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
break;
case X86::PSHUFDri:
case X86::VPSHUFDri:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::PSHUFDmi:
case X86::VPSHUFDmi:
DestName = getRegName(MI->getOperand(0).getReg());
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodePSHUFMask(MVT::v4i32,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
break;
case X86::VPSHUFDYri:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::VPSHUFDYmi:
DestName = getRegName(MI->getOperand(0).getReg());
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodePSHUFMask(MVT::v8i32,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
break;
case X86::PSHUFHWri:
case X86::VPSHUFHWri:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::PSHUFHWmi:
case X86::VPSHUFHWmi:
DestName = getRegName(MI->getOperand(0).getReg());
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodePSHUFHWMask(MVT::v8i16,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
break;
case X86::VPSHUFHWYri:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::VPSHUFHWYmi:
DestName = getRegName(MI->getOperand(0).getReg());
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodePSHUFHWMask(MVT::v16i16,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
break;
case X86::PSHUFLWri:
case X86::VPSHUFLWri:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::PSHUFLWmi:
case X86::VPSHUFLWmi:
DestName = getRegName(MI->getOperand(0).getReg());
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodePSHUFLWMask(MVT::v8i16,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
break;
case X86::VPSHUFLWYri:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::VPSHUFLWYmi:
DestName = getRegName(MI->getOperand(0).getReg());
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodePSHUFLWMask(MVT::v16i16,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
break;
case X86::PUNPCKHBWrr:
case X86::VPUNPCKHBWrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::PUNPCKHBWrm:
case X86::VPUNPCKHBWrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKHMask(MVT::v16i8, ShuffleMask);
break;
case X86::VPUNPCKHBWYrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VPUNPCKHBWYrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKHMask(MVT::v32i8, ShuffleMask);
break;
case X86::PUNPCKHWDrr:
case X86::VPUNPCKHWDrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::PUNPCKHWDrm:
case X86::VPUNPCKHWDrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKHMask(MVT::v8i16, ShuffleMask);
break;
case X86::VPUNPCKHWDYrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VPUNPCKHWDYrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKHMask(MVT::v16i16, ShuffleMask);
break;
case X86::PUNPCKHDQrr:
case X86::VPUNPCKHDQrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::PUNPCKHDQrm:
case X86::VPUNPCKHDQrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKHMask(MVT::v4i32, ShuffleMask);
break;
case X86::VPUNPCKHDQYrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VPUNPCKHDQYrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKHMask(MVT::v8i32, ShuffleMask);
break;
case X86::PUNPCKHQDQrr:
case X86::VPUNPCKHQDQrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::PUNPCKHQDQrm:
case X86::VPUNPCKHQDQrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKHMask(MVT::v2i64, ShuffleMask);
break;
case X86::VPUNPCKHQDQYrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VPUNPCKHQDQYrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKHMask(MVT::v4i64, ShuffleMask);
break;
case X86::PUNPCKLBWrr:
case X86::VPUNPCKLBWrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::PUNPCKLBWrm:
case X86::VPUNPCKLBWrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKLMask(MVT::v16i8, ShuffleMask);
break;
case X86::VPUNPCKLBWYrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VPUNPCKLBWYrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKLMask(MVT::v32i8, ShuffleMask);
break;
case X86::PUNPCKLWDrr:
case X86::VPUNPCKLWDrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::PUNPCKLWDrm:
case X86::VPUNPCKLWDrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKLMask(MVT::v8i16, ShuffleMask);
break;
case X86::VPUNPCKLWDYrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VPUNPCKLWDYrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKLMask(MVT::v16i16, ShuffleMask);
break;
case X86::PUNPCKLDQrr:
case X86::VPUNPCKLDQrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::PUNPCKLDQrm:
case X86::VPUNPCKLDQrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKLMask(MVT::v4i32, ShuffleMask);
break;
case X86::VPUNPCKLDQYrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VPUNPCKLDQYrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKLMask(MVT::v8i32, ShuffleMask);
break;
case X86::PUNPCKLQDQrr:
case X86::VPUNPCKLQDQrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::PUNPCKLQDQrm:
case X86::VPUNPCKLQDQrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKLMask(MVT::v2i64, ShuffleMask);
break;
case X86::VPUNPCKLQDQYrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VPUNPCKLQDQYrm:
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
DecodeUNPCKLMask(MVT::v4i64, ShuffleMask);
break;
case X86::SHUFPDrri:
case X86::VSHUFPDrri:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::SHUFPDrmi:
case X86::VSHUFPDrmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodeSHUFPMask(MVT::v2f64,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VSHUFPDYrri:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VSHUFPDYrmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodeSHUFPMask(MVT::v4f64,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::SHUFPSrri:
case X86::VSHUFPSrri:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::SHUFPSrmi:
case X86::VSHUFPSrmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodeSHUFPMask(MVT::v4f32,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VSHUFPSYrri:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VSHUFPSYrmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodeSHUFPMask(MVT::v8f32,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::UNPCKLPDrr:
case X86::VUNPCKLPDrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::UNPCKLPDrm:
case X86::VUNPCKLPDrm:
DecodeUNPCKLMask(MVT::v2f64, ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VUNPCKLPDYrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VUNPCKLPDYrm:
DecodeUNPCKLMask(MVT::v4f64, ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::UNPCKLPSrr:
case X86::VUNPCKLPSrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::UNPCKLPSrm:
case X86::VUNPCKLPSrm:
DecodeUNPCKLMask(MVT::v4f32, ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VUNPCKLPSYrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VUNPCKLPSYrm:
DecodeUNPCKLMask(MVT::v8f32, ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::UNPCKHPDrr:
case X86::VUNPCKHPDrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::UNPCKHPDrm:
case X86::VUNPCKHPDrm:
DecodeUNPCKHMask(MVT::v2f64, ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VUNPCKHPDYrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VUNPCKHPDYrm:
DecodeUNPCKHMask(MVT::v4f64, ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::UNPCKHPSrr:
case X86::VUNPCKHPSrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::UNPCKHPSrm:
case X86::VUNPCKHPSrm:
DecodeUNPCKHMask(MVT::v4f32, ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VUNPCKHPSYrr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VUNPCKHPSYrm:
DecodeUNPCKHMask(MVT::v8f32, ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VPERMILPSri:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::VPERMILPSmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodePSHUFMask(MVT::v4f32,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VPERMILPSYri:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::VPERMILPSYmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodePSHUFMask(MVT::v8f32,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VPERMILPDri:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::VPERMILPDmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodePSHUFMask(MVT::v2f64,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VPERMILPDYri:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::VPERMILPDYmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodePSHUFMask(MVT::v4f64,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VPERM2F128rr:
case X86::VPERM2I128rr:
Src2Name = getRegName(MI->getOperand(2).getReg());
// FALL THROUGH.
case X86::VPERM2F128rm:
case X86::VPERM2I128rm:
// For instruction comments purpose, assume the 256-bit vector is v4i64.
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodeVPERM2X128Mask(MVT::v4i64,
MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
Src1Name = getRegName(MI->getOperand(1).getReg());
DestName = getRegName(MI->getOperand(0).getReg());
break;
case X86::VPERMQYri:
case X86::VPERMPDYri:
Src1Name = getRegName(MI->getOperand(1).getReg());
// FALL THROUGH.
case X86::VPERMQYmi:
case X86::VPERMPDYmi:
if(MI->getOperand(MI->getNumOperands()-1).isImm())
DecodeVPERMMask(MI->getOperand(MI->getNumOperands()-1).getImm(),
ShuffleMask);
DestName = getRegName(MI->getOperand(0).getReg());
break;
}
// The only comments we decode are shuffles, so give up if we were unable to
// decode a shuffle mask.
if (ShuffleMask.empty())
return false;
if (!DestName) DestName = Src1Name;
OS << (DestName ? DestName : "mem") << " = ";
// If the two sources are the same, canonicalize the input elements to be
// from the first src so that we get larger element spans.
if (Src1Name == Src2Name) {
for (unsigned i = 0, e = ShuffleMask.size(); i != e; ++i) {
if ((int)ShuffleMask[i] >= 0 && // Not sentinel.
ShuffleMask[i] >= (int)e) // From second mask.
ShuffleMask[i] -= e;
}
}
// The shuffle mask specifies which elements of the src1/src2 fill in the
// destination, with a few sentinel values. Loop through and print them
// out.
for (unsigned i = 0, e = ShuffleMask.size(); i != e; ++i) {
if (i != 0)
OS << ',';
if (ShuffleMask[i] == SM_SentinelZero) {
OS << "zero";
continue;
}
// Otherwise, it must come from src1 or src2. Print the span of elements
// that comes from this src.
bool isSrc1 = ShuffleMask[i] < (int)ShuffleMask.size();
const char *SrcName = isSrc1 ? Src1Name : Src2Name;
OS << (SrcName ? SrcName : "mem") << '[';
bool IsFirst = true;
while (i != e &&
(int)ShuffleMask[i] >= 0 &&
(ShuffleMask[i] < (int)ShuffleMask.size()) == isSrc1) {
if (!IsFirst)
OS << ',';
else
IsFirst = false;
OS << ShuffleMask[i] % ShuffleMask.size();
++i;
}
OS << ']';
--i; // For loop increments element #.
}
//MI->print(OS, 0);
OS << "\n";
// We successfully added a comment to this instruction.
return true;
}
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