Add R600 backend

A new backend supporting AMD GPUs: Radeon HD2XXX - HD7XXX

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169915 91177308-0d34-0410-b5e6-96231b3b80d8

11 files changed, 1341 insertions, 0 deletions

diff --git a/lib/Target/R600/MCTargetDesc/AMDGPUAsmBackend.cpp b/lib/Target/R600/MCTargetDesc/AMDGPUAsmBackend.cpp
new file mode 100644
index 0000000..3417fbc
--- /dev/null
+++ b/lib/Target/R600/MCTargetDesc/AMDGPUAsmBackend.cpp
@@ -0,0 +1,82 @@
+//===-- AMDGPUAsmBackend.cpp - AMDGPU Assembler Backend -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+/// \file
+//===----------------------------------------------------------------------===//
+
+#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/MC/MCAsmBackend.h"
+#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCValue.h"
+#include "llvm/Support/TargetRegistry.h"
+
+using namespace llvm;
+
+namespace {
+
+class AMDGPUMCObjectWriter : public MCObjectWriter {
+public:
+  AMDGPUMCObjectWriter(raw_ostream &OS) : MCObjectWriter(OS, true) { }
+  virtual void ExecutePostLayoutBinding(MCAssembler &Asm,
+                                        const MCAsmLayout &Layout) {
+    //XXX: Implement if necessary.
+  }
+  virtual void RecordRelocation(const MCAssembler &Asm,
+                                const MCAsmLayout &Layout,
+                                const MCFragment *Fragment,
+                                const MCFixup &Fixup,
+                                MCValue Target, uint64_t &FixedValue) {
+    assert(!"Not implemented");
+  }
+
+  virtual void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout);
+
+};
+
+class AMDGPUAsmBackend : public MCAsmBackend {
+public:
+  AMDGPUAsmBackend(const Target &T)
+    : MCAsmBackend() {}
+
+  virtual AMDGPUMCObjectWriter *createObjectWriter(raw_ostream &OS) const;
+  virtual unsigned getNumFixupKinds() const { return 0; };
+  virtual void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
+                          uint64_t Value) const { assert(!"Not implemented"); }
+  virtual bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value,
+                                    const MCInstFragment *DF,
+                                    const MCAsmLayout &Layout) const {
+    return false;
+  }
+  virtual void relaxInstruction(const MCInst &Inst, MCInst &Res) const {
+    assert(!"Not implemented");
+  }
+  virtual bool mayNeedRelaxation(const MCInst &Inst) const { return false; }
+  virtual bool writeNopData(uint64_t Count, MCObjectWriter *OW) const {
+    return true;
+  }
+};
+
+} //End anonymous namespace
+
+void AMDGPUMCObjectWriter::WriteObject(MCAssembler &Asm,
+                                       const MCAsmLayout &Layout) {
+  for (MCAssembler::iterator I = Asm.begin(), E = Asm.end(); I != E; ++I) {
+    Asm.writeSectionData(I, Layout);
+  }
+}
+
+MCAsmBackend *llvm::createAMDGPUAsmBackend(const Target &T, StringRef TT,
+                                           StringRef CPU) {
+  return new AMDGPUAsmBackend(T);
+}
+
+AMDGPUMCObjectWriter * AMDGPUAsmBackend::createObjectWriter(
+                                                        raw_ostream &OS) const {
+  return new AMDGPUMCObjectWriter(OS);
+}
diff --git a/lib/Target/R600/MCTargetDesc/AMDGPUMCAsmInfo.cpp b/lib/Target/R600/MCTargetDesc/AMDGPUMCAsmInfo.cpp
new file mode 100644
index 0000000..4d3d3e7
--- /dev/null
+++ b/lib/Target/R600/MCTargetDesc/AMDGPUMCAsmInfo.cpp
@@ -0,0 +1,85 @@
+//===-- MCTargetDesc/AMDGPUMCAsmInfo.cpp - Assembly Info ------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+/// \file
+//===----------------------------------------------------------------------===//
+
+#include "AMDGPUMCAsmInfo.h"
+
+using namespace llvm;
+AMDGPUMCAsmInfo::AMDGPUMCAsmInfo(const Target &T, StringRef &TT) : MCAsmInfo() {
+  HasSingleParameterDotFile = false;
+  WeakDefDirective = 0;
+  //===------------------------------------------------------------------===//
+  HasSubsectionsViaSymbols = true;
+  HasMachoZeroFillDirective = false;
+  HasMachoTBSSDirective = false;
+  HasStaticCtorDtorReferenceInStaticMode = false;
+  LinkerRequiresNonEmptyDwarfLines = true;
+  MaxInstLength = 16;
+  PCSymbol = "$";
+  SeparatorString = "\n";
+  CommentColumn = 40;
+  CommentString = ";";
+  LabelSuffix = ":";
+  GlobalPrefix = "@";
+  PrivateGlobalPrefix = ";.";
+  LinkerPrivateGlobalPrefix = "!";
+  InlineAsmStart = ";#ASMSTART";
+  InlineAsmEnd = ";#ASMEND";
+  AssemblerDialect = 0;
+  AllowQuotesInName = false;
+  AllowNameToStartWithDigit = false;
+  AllowPeriodsInName = false;
+
+  //===--- Data Emission Directives -------------------------------------===//
+  ZeroDirective = ".zero";
+  AsciiDirective = ".ascii\t";
+  AscizDirective = ".asciz\t";
+  Data8bitsDirective = ".byte\t";
+  Data16bitsDirective = ".short\t";
+  Data32bitsDirective = ".long\t";
+  Data64bitsDirective = ".quad\t";
+  GPRel32Directive = 0;
+  SunStyleELFSectionSwitchSyntax = true;
+  UsesELFSectionDirectiveForBSS = true;
+  HasMicrosoftFastStdCallMangling = false;
+
+  //===--- Alignment Information ----------------------------------------===//
+  AlignDirective = ".align\t";
+  AlignmentIsInBytes = true;
+  TextAlignFillValue = 0;
+
+  //===--- Global Variable Emission Directives --------------------------===//
+  GlobalDirective = ".global";
+  ExternDirective = ".extern";
+  HasSetDirective = false;
+  HasAggressiveSymbolFolding = true;
+  COMMDirectiveAlignmentIsInBytes = false;
+  HasDotTypeDotSizeDirective = false;
+  HasNoDeadStrip = true;
+  HasSymbolResolver = false;
+  WeakRefDirective = ".weakref\t";
+  LinkOnceDirective = 0;
+  //===--- Dwarf Emission Directives -----------------------------------===//
+  HasLEB128 = true;
+  SupportsDebugInformation = true;
+  ExceptionsType = ExceptionHandling::None;
+  DwarfUsesInlineInfoSection = false;
+  DwarfSectionOffsetDirective = ".offset";
+
+}
+
+const char*
+AMDGPUMCAsmInfo::getDataASDirective(unsigned int Size, unsigned int AS) const {
+  return 0;
+}
+
+const MCSection*
+AMDGPUMCAsmInfo::getNonexecutableStackSection(MCContext &CTX) const {
+  return 0;
+}
diff --git a/lib/Target/R600/MCTargetDesc/AMDGPUMCAsmInfo.h b/lib/Target/R600/MCTargetDesc/AMDGPUMCAsmInfo.h
new file mode 100644
index 0000000..3ad0fa6
--- /dev/null
+++ b/lib/Target/R600/MCTargetDesc/AMDGPUMCAsmInfo.h
@@ -0,0 +1,30 @@
+//===-- MCTargetDesc/AMDGPUMCAsmInfo.h - AMDGPU MCAsm Interface  ----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef AMDGPUMCASMINFO_H
+#define AMDGPUMCASMINFO_H
+
+#include "llvm/MC/MCAsmInfo.h"
+namespace llvm {
+
+class Target;
+class StringRef;
+
+class AMDGPUMCAsmInfo : public MCAsmInfo {
+public:
+  explicit AMDGPUMCAsmInfo(const Target &T, StringRef &TT);
+  const char* getDataASDirective(unsigned int Size, unsigned int AS) const;
+  const MCSection* getNonexecutableStackSection(MCContext &CTX) const;
+};
+} // namespace llvm
+#endif // AMDGPUMCASMINFO_H
diff --git a/lib/Target/R600/MCTargetDesc/AMDGPUMCCodeEmitter.h b/lib/Target/R600/MCTargetDesc/AMDGPUMCCodeEmitter.h
new file mode 100644
index 0000000..9d0d6cf
--- /dev/null
+++ b/lib/Target/R600/MCTargetDesc/AMDGPUMCCodeEmitter.h
@@ -0,0 +1,60 @@
+//===-- AMDGPUCodeEmitter.h - AMDGPU Code Emitter interface -----------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// \brief CodeEmitter interface for R600 and SI codegen.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef AMDGPUCODEEMITTER_H
+#define AMDGPUCODEEMITTER_H
+
+#include "llvm/MC/MCCodeEmitter.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace llvm {
+
+class MCInst;
+class MCOperand;
+
+class AMDGPUMCCodeEmitter : public MCCodeEmitter {
+public:
+
+  uint64_t getBinaryCodeForInstr(const MCInst &MI,
+                                 SmallVectorImpl<MCFixup> &Fixups) const;
+
+  virtual uint64_t getMachineOpValue(const MCInst &MI, const MCOperand &MO,
+                                     SmallVectorImpl<MCFixup> &Fixups) const {
+    return 0;
+  }
+
+  virtual unsigned GPR4AlignEncode(const MCInst  &MI, unsigned OpNo,
+                                   SmallVectorImpl<MCFixup> &Fixups) const {
+    return 0;
+  }
+  virtual unsigned GPR2AlignEncode(const MCInst &MI, unsigned OpNo,
+                                   SmallVectorImpl<MCFixup> &Fixups) const {
+    return 0;
+  }
+  virtual uint64_t VOPPostEncode(const MCInst &MI, uint64_t Value) const {
+    return Value;
+  }
+  virtual uint64_t i32LiteralEncode(const MCInst &MI, unsigned OpNo,
+                                   SmallVectorImpl<MCFixup> &Fixups) const {
+    return 0;
+  }
+  virtual uint32_t SMRDmemriEncode(const MCInst &MI, unsigned OpNo,
+                                   SmallVectorImpl<MCFixup> &Fixups) const {
+    return 0;
+  }
+};
+
+} // End namespace llvm
+
+#endif // AMDGPUCODEEMITTER_H
diff --git a/lib/Target/R600/MCTargetDesc/AMDGPUMCTargetDesc.cpp b/lib/Target/R600/MCTargetDesc/AMDGPUMCTargetDesc.cpp
new file mode 100644
index 0000000..6a62856
--- /dev/null
+++ b/lib/Target/R600/MCTargetDesc/AMDGPUMCTargetDesc.cpp
@@ -0,0 +1,113 @@
+//===-- AMDGPUMCTargetDesc.cpp - AMDGPU Target Descriptions ---------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// \brief This file provides AMDGPU specific target descriptions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "AMDGPUMCTargetDesc.h"
+#include "AMDGPUMCAsmInfo.h"
+#include "InstPrinter/AMDGPUInstPrinter.h"
+#include "llvm/MC/MachineLocation.h"
+#include "llvm/MC/MCCodeGenInfo.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/TargetRegistry.h"
+
+#define GET_INSTRINFO_MC_DESC
+#include "AMDGPUGenInstrInfo.inc"
+
+#define GET_SUBTARGETINFO_MC_DESC
+#include "AMDGPUGenSubtargetInfo.inc"
+
+#define GET_REGINFO_MC_DESC
+#include "AMDGPUGenRegisterInfo.inc"
+
+using namespace llvm;
+
+static MCInstrInfo *createAMDGPUMCInstrInfo() {
+  MCInstrInfo *X = new MCInstrInfo();
+  InitAMDGPUMCInstrInfo(X);
+  return X;
+}
+
+static MCRegisterInfo *createAMDGPUMCRegisterInfo(StringRef TT) {
+  MCRegisterInfo *X = new MCRegisterInfo();
+  InitAMDGPUMCRegisterInfo(X, 0);
+  return X;
+}
+
+static MCSubtargetInfo *createAMDGPUMCSubtargetInfo(StringRef TT, StringRef CPU,
+                                                   StringRef FS) {
+  MCSubtargetInfo * X = new MCSubtargetInfo();
+  InitAMDGPUMCSubtargetInfo(X, TT, CPU, FS);
+  return X;
+}
+
+static MCCodeGenInfo *createAMDGPUMCCodeGenInfo(StringRef TT, Reloc::Model RM,
+                                               CodeModel::Model CM,
+                                               CodeGenOpt::Level OL) {
+  MCCodeGenInfo *X = new MCCodeGenInfo();
+  X->InitMCCodeGenInfo(RM, CM, OL);
+  return X;
+}
+
+static MCInstPrinter *createAMDGPUMCInstPrinter(const Target &T,
+                                                unsigned SyntaxVariant,
+                                                const MCAsmInfo &MAI,
+                                                const MCInstrInfo &MII,
+                                                const MCRegisterInfo &MRI,
+                                                const MCSubtargetInfo &STI) {
+  return new AMDGPUInstPrinter(MAI, MII, MRI);
+}
+
+static MCCodeEmitter *createAMDGPUMCCodeEmitter(const MCInstrInfo &MCII,
+                                                const MCRegisterInfo &MRI,
+                                                const MCSubtargetInfo &STI,
+                                                MCContext &Ctx) {
+  if (STI.getFeatureBits() & AMDGPU::Feature64BitPtr) {
+    return createSIMCCodeEmitter(MCII, MRI, STI, Ctx);
+  } else {
+    return createR600MCCodeEmitter(MCII, MRI, STI, Ctx);
+  }
+}
+
+static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
+                                    MCContext &Ctx, MCAsmBackend &MAB,
+                                    raw_ostream &_OS,
+                                    MCCodeEmitter *_Emitter,
+                                    bool RelaxAll,
+                                    bool NoExecStack) {
+  return createPureStreamer(Ctx, MAB, _OS, _Emitter);
+}
+
+extern "C" void LLVMInitializeR600TargetMC() {
+
+  RegisterMCAsmInfo<AMDGPUMCAsmInfo> Y(TheAMDGPUTarget);
+
+  TargetRegistry::RegisterMCCodeGenInfo(TheAMDGPUTarget, createAMDGPUMCCodeGenInfo);
+
+  TargetRegistry::RegisterMCInstrInfo(TheAMDGPUTarget, createAMDGPUMCInstrInfo);
+
+  TargetRegistry::RegisterMCRegInfo(TheAMDGPUTarget, createAMDGPUMCRegisterInfo);
+
+  TargetRegistry::RegisterMCSubtargetInfo(TheAMDGPUTarget, createAMDGPUMCSubtargetInfo);
+
+  TargetRegistry::RegisterMCInstPrinter(TheAMDGPUTarget, createAMDGPUMCInstPrinter);
+
+  TargetRegistry::RegisterMCCodeEmitter(TheAMDGPUTarget, createAMDGPUMCCodeEmitter);
+
+  TargetRegistry::RegisterMCAsmBackend(TheAMDGPUTarget, createAMDGPUAsmBackend);
+
+  TargetRegistry::RegisterMCObjectStreamer(TheAMDGPUTarget, createMCStreamer);
+}
diff --git a/lib/Target/R600/MCTargetDesc/AMDGPUMCTargetDesc.h b/lib/Target/R600/MCTargetDesc/AMDGPUMCTargetDesc.h
new file mode 100644
index 0000000..363a4af
--- /dev/null
+++ b/lib/Target/R600/MCTargetDesc/AMDGPUMCTargetDesc.h
@@ -0,0 +1,55 @@
+//===-- AMDGPUMCTargetDesc.h - AMDGPU Target Descriptions -----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// \brief Provides AMDGPU specific target descriptions.
+//
+//===----------------------------------------------------------------------===//
+//
+
+#ifndef AMDGPUMCTARGETDESC_H
+#define AMDGPUMCTARGETDESC_H
+
+#include "llvm/ADT/StringRef.h"
+
+namespace llvm {
+class MCAsmBackend;
+class MCCodeEmitter;
+class MCContext;
+class MCInstrInfo;
+class MCRegisterInfo;
+class MCSubtargetInfo;
+class Target;
+
+extern Target TheAMDGPUTarget;
+
+MCCodeEmitter *createR600MCCodeEmitter(const MCInstrInfo &MCII,
+                                       const MCRegisterInfo &MRI,
+                                       const MCSubtargetInfo &STI,
+                                       MCContext &Ctx);
+
+MCCodeEmitter *createSIMCCodeEmitter(const MCInstrInfo &MCII,
+                                     const MCRegisterInfo &MRI,
+                                     const MCSubtargetInfo &STI,
+                                     MCContext &Ctx);
+
+MCAsmBackend *createAMDGPUAsmBackend(const Target &T, StringRef TT,
+                                     StringRef CPU);
+} // End llvm namespace
+
+#define GET_REGINFO_ENUM
+#include "AMDGPUGenRegisterInfo.inc"
+
+#define GET_INSTRINFO_ENUM
+#include "AMDGPUGenInstrInfo.inc"
+
+#define GET_SUBTARGETINFO_ENUM
+#include "AMDGPUGenSubtargetInfo.inc"
+
+#endif // AMDGPUMCTARGETDESC_H
diff --git a/lib/Target/R600/MCTargetDesc/CMakeLists.txt b/lib/Target/R600/MCTargetDesc/CMakeLists.txt
new file mode 100644
index 0000000..37e714c
--- /dev/null
+++ b/lib/Target/R600/MCTargetDesc/CMakeLists.txt
@@ -0,0 +1,10 @@
+
+add_llvm_library(LLVMR600Desc
+  AMDGPUAsmBackend.cpp
+  AMDGPUMCTargetDesc.cpp
+  AMDGPUMCAsmInfo.cpp
+  R600MCCodeEmitter.cpp
+  SIMCCodeEmitter.cpp
+  )
+
+add_dependencies(LLVMR600Desc AMDGPUCommonTableGen)
diff --git a/lib/Target/R600/MCTargetDesc/LLVMBuild.txt b/lib/Target/R600/MCTargetDesc/LLVMBuild.txt
new file mode 100644
index 0000000..b1beab0
--- /dev/null
+++ b/lib/Target/R600/MCTargetDesc/LLVMBuild.txt
@@ -0,0 +1,23 @@
+;===- ./lib/Target/R600/MCTargetDesc/LLVMBuild.txt ------------*- Conf -*--===;
+;
+;                     The LLVM Compiler Infrastructure
+;
+; This file is distributed under the University of Illinois Open Source
+; License. See LICENSE.TXT for details.
+;
+;===------------------------------------------------------------------------===;
+;
+; This is an LLVMBuild description file for the components in this subdirectory.
+;
+; For more information on the LLVMBuild system, please see:
+;
+;   http://llvm.org/docs/LLVMBuild.html
+;
+;===------------------------------------------------------------------------===;
+
+[component_0]
+type = Library
+name = R600Desc
+parent = R600
+required_libraries = R600AsmPrinter R600Info MC
+add_to_library_groups = R600
diff --git a/lib/Target/R600/MCTargetDesc/Makefile b/lib/Target/R600/MCTargetDesc/Makefile
new file mode 100644
index 0000000..8894a76
--- /dev/null
+++ b/lib/Target/R600/MCTargetDesc/Makefile
@@ -0,0 +1,16 @@
+##===- lib/Target/AMDGPU/TargetDesc/Makefile ----------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../../../..
+LIBRARYNAME = LLVMR600Desc
+
+# Hack: we need to include 'main' target directory to grab private headers
+CPP.Flags += -I$(PROJ_OBJ_DIR)/.. -I$(PROJ_SRC_DIR)/..
+
+include $(LEVEL)/Makefile.common
diff --git a/lib/Target/R600/MCTargetDesc/R600MCCodeEmitter.cpp b/lib/Target/R600/MCTargetDesc/R600MCCodeEmitter.cpp
new file mode 100644
index 0000000..dc91924
--- /dev/null
+++ b/lib/Target/R600/MCTargetDesc/R600MCCodeEmitter.cpp
@@ -0,0 +1,575 @@
+//===- R600MCCodeEmitter.cpp - Code Emitter for R600->Cayman GPU families -===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+///
+/// This code emitter outputs bytecode that is understood by the r600g driver
+/// in the Mesa [1] project.  The bytecode is very similar to the hardware's ISA,
+/// but it still needs to be run through a finalizer in order to be executed
+/// by the GPU.
+///
+/// [1] http://www.mesa3d.org/
+//
+//===----------------------------------------------------------------------===//
+
+#include "R600Defines.h"
+#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
+#include "MCTargetDesc/AMDGPUMCCodeEmitter.h"
+#include "llvm/MC/MCCodeEmitter.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/Support/raw_ostream.h"
+
+#include <stdio.h>
+
+#define SRC_BYTE_COUNT 11
+#define DST_BYTE_COUNT 5
+
+using namespace llvm;
+
+namespace {
+
+class R600MCCodeEmitter : public AMDGPUMCCodeEmitter {
+  R600MCCodeEmitter(const R600MCCodeEmitter &); // DO NOT IMPLEMENT
+  void operator=(const R600MCCodeEmitter &); // DO NOT IMPLEMENT
+  const MCInstrInfo &MCII;
+  const MCRegisterInfo &MRI;
+  const MCSubtargetInfo &STI;
+  MCContext &Ctx;
+
+public:
+
+  R600MCCodeEmitter(const MCInstrInfo &mcii, const MCRegisterInfo &mri,
+                    const MCSubtargetInfo &sti, MCContext &ctx)
+    : MCII(mcii), MRI(mri), STI(sti), Ctx(ctx) { }
+
+  /// \brief Encode the instruction and write it to the OS.
+  virtual void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
+                         SmallVectorImpl<MCFixup> &Fixups) const;
+
+  /// \returns the encoding for an MCOperand.
+  virtual uint64_t getMachineOpValue(const MCInst &MI, const MCOperand &MO,
+                                     SmallVectorImpl<MCFixup> &Fixups) const;
+private:
+
+  void EmitALUInstr(const MCInst &MI, SmallVectorImpl<MCFixup> &Fixups,
+                    raw_ostream &OS) const;
+  void EmitSrc(const MCInst &MI, unsigned OpIdx, raw_ostream &OS) const;
+  void EmitSrcISA(const MCInst &MI, unsigned OpIdx, uint64_t &Value,
+                  raw_ostream &OS) const;
+  void EmitDst(const MCInst &MI, raw_ostream &OS) const;
+  void EmitTexInstr(const MCInst &MI, SmallVectorImpl<MCFixup> &Fixups,
+                    raw_ostream &OS) const;
+  void EmitFCInstr(const MCInst &MI, raw_ostream &OS) const;
+
+  void EmitNullBytes(unsigned int byteCount, raw_ostream &OS) const;
+
+  void EmitByte(unsigned int byte, raw_ostream &OS) const;
+
+  void EmitTwoBytes(uint32_t bytes, raw_ostream &OS) const;
+
+  void Emit(uint32_t value, raw_ostream &OS) const;
+  void Emit(uint64_t value, raw_ostream &OS) const;
+
+  unsigned getHWRegChan(unsigned reg) const;
+  unsigned getHWReg(unsigned regNo) const;
+
+  bool isFCOp(unsigned opcode) const;
+  bool isTexOp(unsigned opcode) const;
+  bool isFlagSet(const MCInst &MI, unsigned Operand, unsigned Flag) const;
+
+};
+
+} // End anonymous namespace
+
+enum RegElement {
+  ELEMENT_X = 0,
+  ELEMENT_Y,
+  ELEMENT_Z,
+  ELEMENT_W
+};
+
+enum InstrTypes {
+  INSTR_ALU = 0,
+  INSTR_TEX,
+  INSTR_FC,
+  INSTR_NATIVE,
+  INSTR_VTX,
+  INSTR_EXPORT
+};
+
+enum FCInstr {
+  FC_IF_PREDICATE = 0,
+  FC_ELSE,
+  FC_ENDIF,
+  FC_BGNLOOP,
+  FC_ENDLOOP,
+  FC_BREAK_PREDICATE,
+  FC_CONTINUE
+};
+
+enum TextureTypes {
+  TEXTURE_1D = 1,
+  TEXTURE_2D,
+  TEXTURE_3D,
+  TEXTURE_CUBE,
+  TEXTURE_RECT,
+  TEXTURE_SHADOW1D,
+  TEXTURE_SHADOW2D,
+  TEXTURE_SHADOWRECT,
+  TEXTURE_1D_ARRAY,
+  TEXTURE_2D_ARRAY,
+  TEXTURE_SHADOW1D_ARRAY,
+  TEXTURE_SHADOW2D_ARRAY
+};
+
+MCCodeEmitter *llvm::createR600MCCodeEmitter(const MCInstrInfo &MCII,
+                                           const MCRegisterInfo &MRI,
+                                           const MCSubtargetInfo &STI,
+                                           MCContext &Ctx) {
+  return new R600MCCodeEmitter(MCII, MRI, STI, Ctx);
+}
+
+void R600MCCodeEmitter::EncodeInstruction(const MCInst &MI, raw_ostream &OS,
+                                       SmallVectorImpl<MCFixup> &Fixups) const {
+  if (isTexOp(MI.getOpcode())) {
+    EmitTexInstr(MI, Fixups, OS);
+  } else if (isFCOp(MI.getOpcode())){
+    EmitFCInstr(MI, OS);
+  } else if (MI.getOpcode() == AMDGPU::RETURN ||
+    MI.getOpcode() == AMDGPU::BUNDLE ||
+    MI.getOpcode() == AMDGPU::KILL) {
+    return;
+  } else {
+    switch(MI.getOpcode()) {
+    case AMDGPU::RAT_WRITE_CACHELESS_32_eg:
+    case AMDGPU::RAT_WRITE_CACHELESS_128_eg: {
+      uint64_t inst = getBinaryCodeForInstr(MI, Fixups);
+      EmitByte(INSTR_NATIVE, OS);
+      Emit(inst, OS);
+      break;
+    }
+    case AMDGPU::CONSTANT_LOAD_eg:
+    case AMDGPU::VTX_READ_PARAM_8_eg:
+    case AMDGPU::VTX_READ_PARAM_16_eg:
+    case AMDGPU::VTX_READ_PARAM_32_eg:
+    case AMDGPU::VTX_READ_GLOBAL_8_eg:
+    case AMDGPU::VTX_READ_GLOBAL_32_eg:
+    case AMDGPU::VTX_READ_GLOBAL_128_eg: {
+      uint64_t InstWord01 = getBinaryCodeForInstr(MI, Fixups);
+      uint32_t InstWord2 = MI.getOperand(2).getImm(); // Offset
+
+      EmitByte(INSTR_VTX, OS);
+      Emit(InstWord01, OS);
+      Emit(InstWord2, OS);
+      break;
+    }
+    case AMDGPU::EG_ExportSwz:
+    case AMDGPU::R600_ExportSwz:
+    case AMDGPU::EG_ExportBuf:
+    case AMDGPU::R600_ExportBuf: {
+      uint64_t Inst = getBinaryCodeForInstr(MI, Fixups);
+      EmitByte(INSTR_EXPORT, OS);
+      Emit(Inst, OS);
+      break;
+    }
+
+    default:
+      EmitALUInstr(MI, Fixups, OS);
+      break;
+    }
+  }
+}
+
+void R600MCCodeEmitter::EmitALUInstr(const MCInst &MI,
+                                     SmallVectorImpl<MCFixup> &Fixups,
+                                     raw_ostream &OS) const {
+  const MCInstrDesc &MCDesc = MCII.get(MI.getOpcode());
+  unsigned NumOperands = MI.getNumOperands();
+
+  // Emit instruction type
+  EmitByte(INSTR_ALU, OS);
+
+  uint64_t InstWord01 = getBinaryCodeForInstr(MI, Fixups);
+
+  //older alu have different encoding for instructions with one or two src
+  //parameters.
+  if ((STI.getFeatureBits() & AMDGPU::FeatureR600ALUInst) &&
+      !(MCDesc.TSFlags & R600_InstFlag::OP3)) {
+    uint64_t ISAOpCode = InstWord01 & (0x3FFULL << 39);
+    InstWord01 &= ~(0x3FFULL << 39);
+    InstWord01 |= ISAOpCode << 1;
+  }
+
+  unsigned SrcIdx = 0;
+  for (unsigned int OpIdx = 1; OpIdx < NumOperands; ++OpIdx) {
+    if (MI.getOperand(OpIdx).isImm() || MI.getOperand(OpIdx).isFPImm() ||
+        OpIdx == (unsigned)MCDesc.findFirstPredOperandIdx()) {
+      continue;
+    }
+    EmitSrcISA(MI, OpIdx, InstWord01, OS);
+    SrcIdx++;
+  }
+
+  // Emit zeros for unused sources
+  for ( ; SrcIdx < 3; SrcIdx++) {
+    EmitNullBytes(SRC_BYTE_COUNT - 6, OS);
+  }
+
+  Emit(InstWord01, OS);
+  return;
+}
+
+void R600MCCodeEmitter::EmitSrc(const MCInst &MI, unsigned OpIdx,
+                                raw_ostream &OS) const {
+  const MCOperand &MO = MI.getOperand(OpIdx);
+  union {
+    float f;
+    uint32_t i;
+  } Value;
+  Value.i = 0;
+  // Emit the source select (2 bytes).  For GPRs, this is the register index.
+  // For other potential instruction operands, (e.g. constant registers) the
+  // value of the source select is defined in the r600isa docs.
+  if (MO.isReg()) {
+    unsigned reg = MO.getReg();
+    EmitTwoBytes(getHWReg(reg), OS);
+    if (reg == AMDGPU::ALU_LITERAL_X) {
+      unsigned ImmOpIndex = MI.getNumOperands() - 1;
+      MCOperand ImmOp = MI.getOperand(ImmOpIndex);
+      if (ImmOp.isFPImm()) {
+        Value.f = ImmOp.getFPImm();
+      } else {
+        assert(ImmOp.isImm());
+        Value.i = ImmOp.getImm();
+      }
+    }
+  } else {
+    // XXX: Handle other operand types.
+    EmitTwoBytes(0, OS);
+  }
+
+  // Emit the source channel (1 byte)
+  if (MO.isReg()) {
+    EmitByte(getHWRegChan(MO.getReg()), OS);
+  } else {
+    EmitByte(0, OS);
+  }
+
+  // XXX: Emit isNegated (1 byte)
+  if ((!(isFlagSet(MI, OpIdx, MO_FLAG_ABS)))
+      && (isFlagSet(MI, OpIdx, MO_FLAG_NEG) ||
+     (MO.isReg() &&
+      (MO.getReg() == AMDGPU::NEG_ONE || MO.getReg() == AMDGPU::NEG_HALF)))){
+    EmitByte(1, OS);
+  } else {
+    EmitByte(0, OS);
+  }
+
+  // Emit isAbsolute (1 byte)
+  if (isFlagSet(MI, OpIdx, MO_FLAG_ABS)) {
+    EmitByte(1, OS);
+  } else {
+    EmitByte(0, OS);
+  }
+
+  // XXX: Emit relative addressing mode (1 byte)
+  EmitByte(0, OS);
+
+  // Emit kc_bank, This will be adjusted later by r600_asm
+  EmitByte(0, OS);
+
+  // Emit the literal value, if applicable (4 bytes).
+  Emit(Value.i, OS);
+
+}
+
+void R600MCCodeEmitter::EmitSrcISA(const MCInst &MI, unsigned OpIdx,
+                                   uint64_t &Value, raw_ostream &OS) const {
+  const MCOperand &MO = MI.getOperand(OpIdx);
+  union {
+    float f;
+    uint32_t i;
+  } InlineConstant;
+  InlineConstant.i = 0;
+  // Emit the source select (2 bytes).  For GPRs, this is the register index.
+  // For other potential instruction operands, (e.g. constant registers) the
+  // value of the source select is defined in the r600isa docs.
+  if (MO.isReg()) {
+    unsigned Reg = MO.getReg();
+    if (AMDGPUMCRegisterClasses[AMDGPU::R600_CReg32RegClassID].contains(Reg)) {
+      EmitByte(1, OS);
+    } else {
+      EmitByte(0, OS);
+    }
+
+    if (Reg == AMDGPU::ALU_LITERAL_X) {
+      unsigned ImmOpIndex = MI.getNumOperands() - 1;
+      MCOperand ImmOp = MI.getOperand(ImmOpIndex);
+      if (ImmOp.isFPImm()) {
+        InlineConstant.f = ImmOp.getFPImm();
+      } else {
+        assert(ImmOp.isImm());
+        InlineConstant.i = ImmOp.getImm();
+      }
+    }
+  }
+
+  // Emit the literal value, if applicable (4 bytes).
+  Emit(InlineConstant.i, OS);
+}
+
+void R600MCCodeEmitter::EmitTexInstr(const MCInst &MI,
+                                     SmallVectorImpl<MCFixup> &Fixups,
+                                     raw_ostream &OS) const {
+
+  unsigned Opcode = MI.getOpcode();
+  bool hasOffsets = (Opcode == AMDGPU::TEX_LD);
+  unsigned OpOffset = hasOffsets ? 3 : 0;
+  int64_t Resource = MI.getOperand(OpOffset + 2).getImm();
+  int64_t Sampler = MI.getOperand(OpOffset + 3).getImm();
+  int64_t TextureType = MI.getOperand(OpOffset + 4).getImm();
+  unsigned srcSelect[4] = {0, 1, 2, 3};
+
+  // Emit instruction type
+  EmitByte(1, OS);
+
+  // Emit instruction
+  EmitByte(getBinaryCodeForInstr(MI, Fixups), OS);
+
+  // Emit resource id
+  EmitByte(Resource, OS);
+
+  // Emit source register
+  EmitByte(getHWReg(MI.getOperand(1).getReg()), OS);
+
+  // XXX: Emit src isRelativeAddress
+  EmitByte(0, OS);
+
+  // Emit destination register
+  EmitByte(getHWReg(MI.getOperand(0).getReg()), OS);
+
+  // XXX: Emit dst isRealtiveAddress
+  EmitByte(0, OS);
+
+  // XXX: Emit dst select
+  EmitByte(0, OS); // X
+  EmitByte(1, OS); // Y
+  EmitByte(2, OS); // Z
+  EmitByte(3, OS); // W
+
+  // XXX: Emit lod bias
+  EmitByte(0, OS);
+
+  // XXX: Emit coord types
+  unsigned coordType[4] = {1, 1, 1, 1};
+
+  if (TextureType == TEXTURE_RECT
+      || TextureType == TEXTURE_SHADOWRECT) {
+    coordType[ELEMENT_X] = 0;
+    coordType[ELEMENT_Y] = 0;
+  }
+
+  if (TextureType == TEXTURE_1D_ARRAY
+      || TextureType == TEXTURE_SHADOW1D_ARRAY) {
+    if (Opcode == AMDGPU::TEX_SAMPLE_C_L || Opcode == AMDGPU::TEX_SAMPLE_C_LB) {
+      coordType[ELEMENT_Y] = 0;
+    } else {
+      coordType[ELEMENT_Z] = 0;
+      srcSelect[ELEMENT_Z] = ELEMENT_Y;
+    }
+  } else if (TextureType == TEXTURE_2D_ARRAY
+             || TextureType == TEXTURE_SHADOW2D_ARRAY) {
+    coordType[ELEMENT_Z] = 0;
+  }
+
+  for (unsigned i = 0; i < 4; i++) {
+    EmitByte(coordType[i], OS);
+  }
+
+  // XXX: Emit offsets
+  if (hasOffsets)
+	  for (unsigned i = 2; i < 5; i++)
+		  EmitByte(MI.getOperand(i).getImm()<<1, OS);
+  else
+	  EmitNullBytes(3, OS);
+
+  // Emit sampler id
+  EmitByte(Sampler, OS);
+
+  // XXX:Emit source select
+  if ((TextureType == TEXTURE_SHADOW1D
+      || TextureType == TEXTURE_SHADOW2D
+      || TextureType == TEXTURE_SHADOWRECT
+      || TextureType == TEXTURE_SHADOW1D_ARRAY)
+      && Opcode != AMDGPU::TEX_SAMPLE_C_L
+      && Opcode != AMDGPU::TEX_SAMPLE_C_LB) {
+    srcSelect[ELEMENT_W] = ELEMENT_Z;
+  }
+
+  for (unsigned i = 0; i < 4; i++) {
+    EmitByte(srcSelect[i], OS);
+  }
+}
+
+void R600MCCodeEmitter::EmitFCInstr(const MCInst &MI, raw_ostream &OS) const {
+
+  // Emit instruction type
+  EmitByte(INSTR_FC, OS);
+
+  // Emit SRC
+  unsigned NumOperands = MI.getNumOperands();
+  if (NumOperands > 0) {
+    assert(NumOperands == 1);
+    EmitSrc(MI, 0, OS);
+  } else {
+    EmitNullBytes(SRC_BYTE_COUNT, OS);
+  }
+
+  // Emit FC Instruction
+  enum FCInstr instr;
+  switch (MI.getOpcode()) {
+  case AMDGPU::PREDICATED_BREAK:
+    instr = FC_BREAK_PREDICATE;
+    break;
+  case AMDGPU::CONTINUE:
+    instr = FC_CONTINUE;
+    break;
+  case AMDGPU::IF_PREDICATE_SET:
+    instr = FC_IF_PREDICATE;
+    break;
+  case AMDGPU::ELSE:
+    instr = FC_ELSE;
+    break;
+  case AMDGPU::ENDIF:
+    instr = FC_ENDIF;
+    break;
+  case AMDGPU::ENDLOOP:
+    instr = FC_ENDLOOP;
+    break;
+  case AMDGPU::WHILELOOP:
+    instr = FC_BGNLOOP;
+    break;
+  default:
+    abort();
+    break;
+  }
+  EmitByte(instr, OS);
+}
+
+void R600MCCodeEmitter::EmitNullBytes(unsigned int ByteCount,
+                                      raw_ostream &OS) const {
+
+  for (unsigned int i = 0; i < ByteCount; i++) {
+    EmitByte(0, OS);
+  }
+}
+
+void R600MCCodeEmitter::EmitByte(unsigned int Byte, raw_ostream &OS) const {
+  OS.write((uint8_t) Byte & 0xff);
+}
+
+void R600MCCodeEmitter::EmitTwoBytes(unsigned int Bytes,
+                                     raw_ostream &OS) const {
+  OS.write((uint8_t) (Bytes & 0xff));
+  OS.write((uint8_t) ((Bytes >> 8) & 0xff));
+}
+
+void R600MCCodeEmitter::Emit(uint32_t Value, raw_ostream &OS) const {
+  for (unsigned i = 0; i < 4; i++) {
+    OS.write((uint8_t) ((Value >> (8 * i)) & 0xff));
+  }
+}
+
+void R600MCCodeEmitter::Emit(uint64_t Value, raw_ostream &OS) const {
+  for (unsigned i = 0; i < 8; i++) {
+    EmitByte((Value >> (8 * i)) & 0xff, OS);
+  }
+}
+
+unsigned R600MCCodeEmitter::getHWRegChan(unsigned reg) const {
+  return MRI.getEncodingValue(reg) >> HW_CHAN_SHIFT;
+}
+
+unsigned R600MCCodeEmitter::getHWReg(unsigned RegNo) const {
+  return MRI.getEncodingValue(RegNo) & HW_REG_MASK;
+}
+
+uint64_t R600MCCodeEmitter::getMachineOpValue(const MCInst &MI,
+                                              const MCOperand &MO,
+                                        SmallVectorImpl<MCFixup> &Fixup) const {
+  if (MO.isReg()) {
+    if (HAS_NATIVE_OPERANDS(MCII.get(MI.getOpcode()).TSFlags)) {
+      return MRI.getEncodingValue(MO.getReg());
+    } else {
+      return getHWReg(MO.getReg());
+    }
+  } else if (MO.isImm()) {
+    return MO.getImm();
+  } else {
+    assert(0);
+    return 0;
+  }
+}
+
+//===----------------------------------------------------------------------===//
+// Encoding helper functions
+//===----------------------------------------------------------------------===//
+
+bool R600MCCodeEmitter::isFCOp(unsigned opcode) const {
+  switch(opcode) {
+  default: return false;
+  case AMDGPU::PREDICATED_BREAK:
+  case AMDGPU::CONTINUE:
+  case AMDGPU::IF_PREDICATE_SET:
+  case AMDGPU::ELSE:
+  case AMDGPU::ENDIF:
+  case AMDGPU::ENDLOOP:
+  case AMDGPU::WHILELOOP:
+    return true;
+  }
+}
+
+bool R600MCCodeEmitter::isTexOp(unsigned opcode) const {
+  switch(opcode) {
+  default: return false;
+  case AMDGPU::TEX_LD:
+  case AMDGPU::TEX_GET_TEXTURE_RESINFO:
+  case AMDGPU::TEX_SAMPLE:
+  case AMDGPU::TEX_SAMPLE_C:
+  case AMDGPU::TEX_SAMPLE_L:
+  case AMDGPU::TEX_SAMPLE_C_L:
+  case AMDGPU::TEX_SAMPLE_LB:
+  case AMDGPU::TEX_SAMPLE_C_LB:
+  case AMDGPU::TEX_SAMPLE_G:
+  case AMDGPU::TEX_SAMPLE_C_G:
+  case AMDGPU::TEX_GET_GRADIENTS_H:
+  case AMDGPU::TEX_GET_GRADIENTS_V:
+  case AMDGPU::TEX_SET_GRADIENTS_H:
+  case AMDGPU::TEX_SET_GRADIENTS_V:
+    return true;
+  }
+}
+
+bool R600MCCodeEmitter::isFlagSet(const MCInst &MI, unsigned Operand,
+                                  unsigned Flag) const {
+  const MCInstrDesc &MCDesc = MCII.get(MI.getOpcode());
+  unsigned FlagIndex = GET_FLAG_OPERAND_IDX(MCDesc.TSFlags);
+  if (FlagIndex == 0) {
+    return false;
+  }
+  assert(MI.getOperand(FlagIndex).isImm());
+  return !!((MI.getOperand(FlagIndex).getImm() >>
+            (NUM_MO_FLAGS * Operand)) & Flag);
+}
+
+#include "AMDGPUGenMCCodeEmitter.inc"
diff --git a/lib/Target/R600/MCTargetDesc/SIMCCodeEmitter.cpp b/lib/Target/R600/MCTargetDesc/SIMCCodeEmitter.cpp
new file mode 100644
index 0000000..7f271d1
--- /dev/null
+++ b/lib/Target/R600/MCTargetDesc/SIMCCodeEmitter.cpp
@@ -0,0 +1,292 @@
+//===-- SIMCCodeEmitter.cpp - SI Code Emitter -------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// \brief The SI code emitter produces machine code that can be executed
+/// directly on the GPU device.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
+#include "MCTargetDesc/AMDGPUMCCodeEmitter.h"
+#include "llvm/MC/MCCodeEmitter.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/Support/raw_ostream.h"
+
+#define VGPR_BIT(src_idx) (1ULL << (9 * src_idx - 1))
+#define SI_INSTR_FLAGS_ENCODING_MASK 0xf
+
+// These must be kept in sync with SIInstructions.td and also the
+// InstrEncodingInfo array in SIInstrInfo.cpp.
+//
+// NOTE: This enum is only used to identify the encoding type within LLVM,
+// the actual encoding type that is part of the instruction format is different
+namespace SIInstrEncodingType {
+  enum Encoding {
+    EXP = 0,
+    LDS = 1,
+    MIMG = 2,
+    MTBUF = 3,
+    MUBUF = 4,
+    SMRD = 5,
+    SOP1 = 6,
+    SOP2 = 7,
+    SOPC = 8,
+    SOPK = 9,
+    SOPP = 10,
+    VINTRP = 11,
+    VOP1 = 12,
+    VOP2 = 13,
+    VOP3 = 14,
+    VOPC = 15
+  };
+}
+
+using namespace llvm;
+
+namespace {
+class SIMCCodeEmitter : public  AMDGPUMCCodeEmitter {
+  SIMCCodeEmitter(const SIMCCodeEmitter &); // DO NOT IMPLEMENT
+  void operator=(const SIMCCodeEmitter &); // DO NOT IMPLEMENT
+  const MCInstrInfo &MCII;
+  const MCRegisterInfo &MRI;
+  const MCSubtargetInfo &STI;
+  MCContext &Ctx;
+
+public:
+  SIMCCodeEmitter(const MCInstrInfo &mcii, const MCRegisterInfo &mri,
+                  const MCSubtargetInfo &sti, MCContext &ctx)
+    : MCII(mcii), MRI(mri), STI(sti), Ctx(ctx) { }
+
+  ~SIMCCodeEmitter() { }
+
+  /// \breif Encode the instruction and write it to the OS.
+  virtual void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
+                         SmallVectorImpl<MCFixup> &Fixups) const;
+
+  /// \returns the encoding for an MCOperand.
+  virtual uint64_t getMachineOpValue(const MCInst &MI, const MCOperand &MO,
+                                     SmallVectorImpl<MCFixup> &Fixups) const;
+
+public:
+
+  /// \brief Encode a sequence of registers with the correct alignment.
+  unsigned GPRAlign(const MCInst &MI, unsigned OpNo, unsigned shift) const;
+
+  /// \brief Encoding for when 2 consecutive registers are used
+  virtual unsigned GPR2AlignEncode(const MCInst &MI, unsigned OpNo,
+                                   SmallVectorImpl<MCFixup> &Fixup) const;
+
+  /// \brief Encoding for when 4 consectuive registers are used
+  virtual unsigned GPR4AlignEncode(const MCInst &MI, unsigned OpNo,
+                                   SmallVectorImpl<MCFixup> &Fixup) const;
+
+  /// \brief Encoding for SMRD indexed loads
+  virtual uint32_t SMRDmemriEncode(const MCInst &MI, unsigned OpNo,
+                                   SmallVectorImpl<MCFixup> &Fixup) const;
+
+  /// \brief Post-Encoder method for VOP instructions
+  virtual uint64_t VOPPostEncode(const MCInst &MI, uint64_t Value) const;
+
+private:
+
+  /// \returns this SIInstrEncodingType for this instruction.
+  unsigned getEncodingType(const MCInst &MI) const;
+
+  /// \brief Get then size in bytes of this instructions encoding.
+  unsigned getEncodingBytes(const MCInst &MI) const;
+
+  /// \returns the hardware encoding for a register
+  unsigned getRegBinaryCode(unsigned reg) const;
+
+  /// \brief Generated function that returns the hardware encoding for
+  /// a register
+  unsigned getHWRegNum(unsigned reg) const;
+
+};
+
+} // End anonymous namespace
+
+MCCodeEmitter *llvm::createSIMCCodeEmitter(const MCInstrInfo &MCII,
+                                           const MCRegisterInfo &MRI,
+                                           const MCSubtargetInfo &STI,
+                                           MCContext &Ctx) {
+  return new SIMCCodeEmitter(MCII, MRI, STI, Ctx);
+}
+
+void SIMCCodeEmitter::EncodeInstruction(const MCInst &MI, raw_ostream &OS,
+                                       SmallVectorImpl<MCFixup> &Fixups) const {
+  uint64_t Encoding = getBinaryCodeForInstr(MI, Fixups);
+  unsigned bytes = getEncodingBytes(MI);
+  for (unsigned i = 0; i < bytes; i++) {
+    OS.write((uint8_t) ((Encoding >> (8 * i)) & 0xff));
+  }
+}
+
+uint64_t SIMCCodeEmitter::getMachineOpValue(const MCInst &MI,
+                                            const MCOperand &MO,
+                                       SmallVectorImpl<MCFixup> &Fixups) const {
+  if (MO.isReg()) {
+    return getRegBinaryCode(MO.getReg());
+  } else if (MO.isImm()) {
+    return MO.getImm();
+  } else if (MO.isFPImm()) {
+    // XXX: Not all instructions can use inline literals
+    // XXX: We should make sure this is a 32-bit constant
+    union {
+      float F;
+      uint32_t I;
+    } Imm;
+    Imm.F = MO.getFPImm();
+    return Imm.I;
+  } else{
+    llvm_unreachable("Encoding of this operand type is not supported yet.");
+  }
+  return 0;
+}
+
+//===----------------------------------------------------------------------===//
+// Custom Operand Encodings
+//===----------------------------------------------------------------------===//
+
+unsigned SIMCCodeEmitter::GPRAlign(const MCInst &MI, unsigned OpNo,
+                                   unsigned shift) const {
+  unsigned regCode = getRegBinaryCode(MI.getOperand(OpNo).getReg());
+  return regCode >> shift;
+  return 0;
+}
+unsigned SIMCCodeEmitter::GPR2AlignEncode(const MCInst &MI,
+                                          unsigned OpNo ,
+                                        SmallVectorImpl<MCFixup> &Fixup) const {
+  return GPRAlign(MI, OpNo, 1);
+}
+
+unsigned SIMCCodeEmitter::GPR4AlignEncode(const MCInst &MI,
+                                          unsigned OpNo,
+                                        SmallVectorImpl<MCFixup> &Fixup) const {
+  return GPRAlign(MI, OpNo, 2);
+}
+
+#define SMRD_OFFSET_MASK 0xff
+#define SMRD_IMM_SHIFT 8
+#define SMRD_SBASE_MASK 0x3f
+#define SMRD_SBASE_SHIFT 9
+/// This function is responsibe for encoding the offset
+/// and the base ptr for SMRD instructions it should return a bit string in
+/// this format:
+///
+/// OFFSET = bits{7-0}
+/// IMM    = bits{8}
+/// SBASE  = bits{14-9}
+///
+uint32_t SIMCCodeEmitter::SMRDmemriEncode(const MCInst &MI, unsigned OpNo,
+                                        SmallVectorImpl<MCFixup> &Fixup) const {
+  uint32_t Encoding;
+
+  const MCOperand &OffsetOp = MI.getOperand(OpNo + 1);
+
+  //XXX: Use this function for SMRD loads with register offsets
+  assert(OffsetOp.isImm());
+
+  Encoding =
+      (getMachineOpValue(MI, OffsetOp, Fixup) & SMRD_OFFSET_MASK)
+    | (1 << SMRD_IMM_SHIFT) //XXX If the Offset is a register we shouldn't set this bit
+    | ((GPR2AlignEncode(MI, OpNo, Fixup) & SMRD_SBASE_MASK) << SMRD_SBASE_SHIFT)
+    ;
+
+  return Encoding;
+}
+
+//===----------------------------------------------------------------------===//
+// Post Encoder Callbacks
+//===----------------------------------------------------------------------===//
+
+uint64_t SIMCCodeEmitter::VOPPostEncode(const MCInst &MI, uint64_t Value) const{
+  unsigned encodingType = getEncodingType(MI);
+  unsigned numSrcOps;
+  unsigned vgprBitOffset;
+
+  if (encodingType == SIInstrEncodingType::VOP3) {
+    numSrcOps = 3;
+    vgprBitOffset = 32;
+  } else {
+    numSrcOps = 1;
+    vgprBitOffset = 0;
+  }
+
+  // Add one to skip over the destination reg operand.
+  for (unsigned opIdx = 1; opIdx < numSrcOps + 1; opIdx++) {
+    const MCOperand &MO = MI.getOperand(opIdx);
+    if (MO.isReg()) {
+      unsigned reg = MI.getOperand(opIdx).getReg();
+      if (AMDGPUMCRegisterClasses[AMDGPU::VReg_32RegClassID].contains(reg) ||
+          AMDGPUMCRegisterClasses[AMDGPU::VReg_64RegClassID].contains(reg)) {
+        Value |= (VGPR_BIT(opIdx)) << vgprBitOffset;
+      }
+    } else if (MO.isFPImm()) {
+      union {
+        float f;
+        uint32_t i;
+      } Imm;
+      // XXX: Not all instructions can use inline literals
+      // XXX: We should make sure this is a 32-bit constant
+      Imm.f = MO.getFPImm();
+      Value |= ((uint64_t)Imm.i) << 32;
+    }
+  }
+  return Value;
+}
+
+//===----------------------------------------------------------------------===//
+// Encoding helper functions
+//===----------------------------------------------------------------------===//
+
+unsigned SIMCCodeEmitter::getEncodingType(const MCInst &MI) const {
+  return MCII.get(MI.getOpcode()).TSFlags & SI_INSTR_FLAGS_ENCODING_MASK;
+}
+
+unsigned SIMCCodeEmitter::getEncodingBytes(const MCInst &MI) const {
+
+  // These instructions aren't real instructions with an encoding type, so
+  // we need to manually specify their size.
+  switch (MI.getOpcode()) {
+  default: break;
+  case AMDGPU::SI_LOAD_LITERAL_I32:
+  case AMDGPU::SI_LOAD_LITERAL_F32:
+    return 4;
+  }
+
+  unsigned encoding_type = getEncodingType(MI);
+  switch (encoding_type) {
+    case SIInstrEncodingType::EXP:
+    case SIInstrEncodingType::LDS:
+    case SIInstrEncodingType::MUBUF:
+    case SIInstrEncodingType::MTBUF:
+    case SIInstrEncodingType::MIMG:
+    case SIInstrEncodingType::VOP3:
+      return 8;
+    default:
+      return 4;
+  }
+}
+
+
+unsigned SIMCCodeEmitter::getRegBinaryCode(unsigned reg) const {
+  switch (reg) {
+    case AMDGPU::M0: return 124;
+    case AMDGPU::SREG_LIT_0: return 128;
+    case AMDGPU::SI_LITERAL_CONSTANT: return 255;
+    default: return MRI.getEncodingValue(reg);
+  }
+}
+