X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FR600%2FMCTargetDesc%2FR600MCCodeEmitter.cpp;h=8a555ff9f0a49ef59306c9df5f3dea7d424ad3ec;hb=66981fe20809820e30dc19ea37ff7487eb67a96f;hp=a945fe9ef81e0ab035bcb5ea7389de64a94328fb;hpb=2691fe98a74bff1ff12e23ff67fc23a9f5fae485;p=oota-llvm.git

diff --git a/lib/Target/R600/MCTargetDesc/R600MCCodeEmitter.cpp b/lib/Target/R600/MCTargetDesc/R600MCCodeEmitter.cpp
index a945fe9ef81..8a555ff9f0a 100644
--- a/lib/Target/R600/MCTargetDesc/R600MCCodeEmitter.cpp
+++ b/lib/Target/R600/MCTargetDesc/R600MCCodeEmitter.cpp
@@ -9,12 +9,8 @@
 //
 /// \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/
+/// \brief The R600 code emitter produces machine code that can be executed
+/// directly on the GPU device.
 //
 //===----------------------------------------------------------------------===//
 
@@ -28,62 +24,41 @@
 #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 &) LLVM_DELETED_FUNCTION;
-  void operator=(const R600MCCodeEmitter &) LLVM_DELETED_FUNCTION;
+  R600MCCodeEmitter(const R600MCCodeEmitter &) = delete;
+  void operator=(const R600MCCodeEmitter &) = delete;
   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) { }
+  R600MCCodeEmitter(const MCInstrInfo &mcii, const MCRegisterInfo &mri)
+    : MCII(mcii), MRI(mri) { }
 
   /// \brief Encode the instruction and write it to the OS.
-  virtual void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
-                         SmallVectorImpl<MCFixup> &Fixups) const;
+  void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
+                         SmallVectorImpl<MCFixup> &Fixups,
+                         const MCSubtargetInfo &STI) const override;
 
   /// \returns the encoding for an MCOperand.
-  virtual uint64_t getMachineOpValue(const MCInst &MI, const MCOperand &MO,
-                                     SmallVectorImpl<MCFixup> &Fixups) const;
+  uint64_t getMachineOpValue(const MCInst &MI, const MCOperand &MO,
+                             SmallVectorImpl<MCFixup> &Fixups,
+                             const MCSubtargetInfo &STI) const override;
 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 RegOpIdx, unsigned SelOpIdx,
-                    raw_ostream &OS) const;
-  void EmitDst(const MCInst &MI, 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
@@ -95,15 +70,6 @@ enum RegElement {
   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,
@@ -114,343 +80,66 @@ enum FCInstr {
   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);
+                                           const MCSubtargetInfo &STI) {
+  return new R600MCCodeEmitter(MCII, MRI);
 }
 
 void R600MCCodeEmitter::EncodeInstruction(const MCInst &MI, raw_ostream &OS,
-                                       SmallVectorImpl<MCFixup> &Fixups) const {
-  if (isFCOp(MI.getOpcode())){
-    EmitFCInstr(MI, OS);
-  } else if (MI.getOpcode() == AMDGPU::RETURN ||
+                                       SmallVectorImpl<MCFixup> &Fixups,
+                                       const MCSubtargetInfo &STI) const {
+  const MCInstrDesc &Desc = MCII.get(MI.getOpcode());
+  if (MI.getOpcode() == AMDGPU::RETURN ||
+    MI.getOpcode() == AMDGPU::FETCH_CLAUSE ||
+    MI.getOpcode() == AMDGPU::ALU_CLAUSE ||
     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;
+  } else if (IS_VTX(Desc)) {
+    uint64_t InstWord01 = getBinaryCodeForInstr(MI, Fixups, STI);
+    uint32_t InstWord2 = MI.getOperand(2).getImm(); // Offset
+    if (!(STI.getFeatureBits() & AMDGPU::FeatureCaymanISA)) {
+      InstWord2 |= 1 << 19; // Mega-Fetch bit
     }
-    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_PARAM_128_eg:
-    case AMDGPU::VTX_READ_GLOBAL_8_eg:
-    case AMDGPU::VTX_READ_GLOBAL_32_eg:
-    case AMDGPU::VTX_READ_GLOBAL_128_eg:
-    case AMDGPU::TEX_VTX_CONSTBUF:
-    case AMDGPU::TEX_VTX_TEXBUF : {
-      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::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: {
-      unsigned Opcode = MI.getOpcode();
-      bool HasOffsets = (Opcode == AMDGPU::TEX_LD);
-      unsigned OpOffset = HasOffsets ? 3 : 0;
-      int64_t Sampler = MI.getOperand(OpOffset + 3).getImm();
-      int64_t TextureType = MI.getOperand(OpOffset + 4).getImm();
-
-      uint32_t SrcSelect[4] = {0, 1, 2, 3};
-      uint32_t Offsets[3] = {0, 0, 0};
-      uint64_t CoordType[4] = {1, 1, 1, 1};
-
-      if (HasOffsets)
-        for (unsigned i = 0; i < 3; i++)
-          Offsets[i] = MI.getOperand(i + 2).getImm();
-
-      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;
-      }
-
-
-      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;
-      }
-
-      uint64_t Word01 = getBinaryCodeForInstr(MI, Fixups) |
-          CoordType[ELEMENT_X] << 60 | CoordType[ELEMENT_Y] << 61 |
-          CoordType[ELEMENT_Z] << 62 | CoordType[ELEMENT_W] << 63;
+    Emit(InstWord01, OS);
+    Emit(InstWord2, OS);
+    Emit((uint32_t) 0, OS);
+  } else if (IS_TEX(Desc)) {
+      int64_t Sampler = MI.getOperand(14).getImm();
+
+      int64_t SrcSelect[4] = {
+        MI.getOperand(2).getImm(),
+        MI.getOperand(3).getImm(),
+        MI.getOperand(4).getImm(),
+        MI.getOperand(5).getImm()
+      };
+      int64_t Offsets[3] = {
+        MI.getOperand(6).getImm() & 0x1F,
+        MI.getOperand(7).getImm() & 0x1F,
+        MI.getOperand(8).getImm() & 0x1F
+      };
+
+      uint64_t Word01 = getBinaryCodeForInstr(MI, Fixups, STI);
       uint32_t Word2 = Sampler << 15 | SrcSelect[ELEMENT_X] << 20 |
           SrcSelect[ELEMENT_Y] << 23 | SrcSelect[ELEMENT_Z] << 26 |
           SrcSelect[ELEMENT_W] << 29 | Offsets[0] << 0 | Offsets[1] << 5 |
           Offsets[2] << 10;
 
-      EmitByte(INSTR_TEX, OS);
       Emit(Word01, OS);
       Emit(Word2, 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());
-
-  // 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 SrcNum = MCDesc.TSFlags & R600_InstFlag::OP3 ? 3 :
-      MCDesc.TSFlags & R600_InstFlag::OP2 ? 2 : 1;
-
-  EmitByte(SrcNum, OS);
-
-  const unsigned SrcOps[3][2] = {
-      {R600Operands::SRC0, R600Operands::SRC0_SEL},
-      {R600Operands::SRC1, R600Operands::SRC1_SEL},
-      {R600Operands::SRC2, R600Operands::SRC2_SEL}
-  };
-
-  for (unsigned SrcIdx = 0; SrcIdx < SrcNum; ++SrcIdx) {
-    unsigned RegOpIdx = R600Operands::ALUOpTable[SrcNum-1][SrcOps[SrcIdx][0]];
-    unsigned SelOpIdx = R600Operands::ALUOpTable[SrcNum-1][SrcOps[SrcIdx][1]];
-    EmitSrcISA(MI, RegOpIdx, SelOpIdx, 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();
-      }
-    }
+      Emit((uint32_t) 0, OS);
   } 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 RegOpIdx,
-                                   unsigned SelOpIdx, raw_ostream &OS) const {
-  const MCOperand &RegMO = MI.getOperand(RegOpIdx);
-  const MCOperand &SelMO = MI.getOperand(SelOpIdx);
-
-  union {
-    float f;
-    uint32_t i;
-  } InlineConstant;
-  InlineConstant.i = 0;
-  // Emit source type (1 byte) and source select (4 bytes). For GPRs type is 0
-  // and select is 0 (GPR index is encoded in the instr encoding. For constants
-  // type is 1 and select is the original const select passed from the driver.
-  unsigned Reg = RegMO.getReg();
-  if (Reg == AMDGPU::ALU_CONST) {
-    EmitByte(1, OS);
-    uint32_t Sel = SelMO.getImm();
-    Emit(Sel, OS);
-  } else {
-    EmitByte(0, OS);
-    Emit((uint32_t)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();
+    uint64_t Inst = getBinaryCodeForInstr(MI, Fixups, STI);
+    if ((STI.getFeatureBits() & AMDGPU::FeatureR600ALUInst) &&
+       ((Desc.TSFlags & R600_InstFlag::OP1) ||
+         Desc.TSFlags & R600_InstFlag::OP2)) {
+      uint64_t ISAOpCode = Inst & (0x3FFULL << 39);
+      Inst &= ~(0x3FFULL << 39);
+      Inst |= ISAOpCode << 1;
     }
-  }
-
-  // Emit the literal value, if applicable (4 bytes).
-  Emit(InlineConstant.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);
+    Emit(Inst, OS);
   }
 }
 
@@ -458,12 +147,6 @@ 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));
@@ -486,70 +169,16 @@ unsigned R600MCCodeEmitter::getHWReg(unsigned RegNo) const {
 
 uint64_t R600MCCodeEmitter::getMachineOpValue(const MCInst &MI,
                                               const MCOperand &MO,
-                                        SmallVectorImpl<MCFixup> &Fixup) const {
+                                        SmallVectorImpl<MCFixup> &Fixup,
+                                        const MCSubtargetInfo &STI) const {
   if (MO.isReg()) {
-    if (HAS_NATIVE_OPERANDS(MCII.get(MI.getOpcode()).TSFlags)) {
+    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;
+    return getHWReg(MO.getReg());
   }
-}
-
-//===----------------------------------------------------------------------===//
-// 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);
+  assert(MO.isImm());
+  return MO.getImm();
 }
 
 #include "AMDGPUGenMCCodeEmitter.inc"