// Copyright (c) 2015-2022 The Khronos Group Inc.

// Modifications Copyright (C) 2020-2024 Advanced Micro Devices, Inc. All

// rights reserved.

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include "source/opcode.h"

#include <assert.h>

#include <string.h>

#include <algorithm>

#include <cstdlib>

#include "source/instruction.h"

#include "source/macro.h"

#include "source/spirv_constant.h"

#include "source/spirv_endian.h"

#include "source/spirv_target_env.h"

#include "source/table2.h"

#include "spirv-tools/libspirv.h"

namespace {

// Represents a vendor tool entry in the SPIR-V XML Registry.

struct VendorTool {

  uint32_t value;

  const char* vendor;

  const char* tool;         // Might be empty string.

  const char* vendor_tool;  // Combination of vendor and tool.

};

const VendorTool vendor_tools[] = {

#include "generators.inc"

};

}  // anonymous namespace

// TODO(dneto): Move this to another file.  It doesn't belong with opcode

// processing.

const char* spvGeneratorStr(uint32_t generator) {

  auto where = std::find_if(

      std::begin(vendor_tools), std::end(vendor_tools),

      [generator](const VendorTool& vt) { return generator == vt.value; });

  if (where != std::end(vendor_tools)) return where->vendor_tool;

  return "Unknown";

}

uint32_t spvOpcodeMake(uint16_t wordCount, spv::Op opcode) {

  return ((uint32_t)opcode) | (((uint32_t)wordCount) << 16);

}

void spvOpcodeSplit(const uint32_t word, uint16_t* pWordCount,

                    uint16_t* pOpcode) {

  if (pWordCount) {

    *pWordCount = (uint16_t)((0xffff0000 & word) >> 16);

  }

  if (pOpcode) {

    *pOpcode = 0x0000ffff & word;

  }

}

void spvInstructionCopy(const uint32_t* words, const spv::Op opcode,

                        const uint16_t wordCount, const spv_endianness_t endian,

                        spv_instruction_t* pInst) {

  pInst->opcode = opcode;

  pInst->words.resize(wordCount);

  for (uint16_t wordIndex = 0; wordIndex < wordCount; ++wordIndex) {

    pInst->words[wordIndex] = spvFixWord(words[wordIndex], endian);

    if (!wordIndex) {

      uint16_t thisWordCount;

      uint16_t thisOpcode;

      spvOpcodeSplit(pInst->words[wordIndex], &thisWordCount, &thisOpcode);

      assert(opcode == static_cast<spv::Op>(thisOpcode) &&

             wordCount == thisWordCount && "Endianness failed!");

    }

  }

}

const char* spvOpcodeString(const uint32_t opcode) {

  const spvtools::InstructionDesc* desc = nullptr;

  if (SPV_SUCCESS !=

      spvtools::LookupOpcode(static_cast<spv::Op>(opcode), &desc)) {

    assert(0 && "Unreachable!");

    return "unknown";

  }

  return desc->name().data();

}

const char* spvOpcodeString(const spv::Op opcode) {

  return spvOpcodeString(static_cast<uint32_t>(opcode));

}

int32_t spvOpcodeIsScalarType(const spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpTypeInt:

    case spv::Op::OpTypeFloat:

    case spv::Op::OpTypeBool:

      return true;

    default:

      return false;

  }

}

int32_t spvOpcodeIsSpecConstant(const spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpSpecConstantTrue:

    case spv::Op::OpSpecConstantFalse:

    case spv::Op::OpSpecConstant:

    case spv::Op::OpSpecConstantComposite:

    case spv::Op::OpSpecConstantCompositeReplicateEXT:

    case spv::Op::OpSpecConstantOp:

      return true;

    default:

      return false;

  }

}

int32_t spvOpcodeIsConstant(const spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpConstantTrue:

    case spv::Op::OpConstantFalse:

    case spv::Op::OpConstant:

    case spv::Op::OpConstantComposite:

    case spv::Op::OpConstantCompositeReplicateEXT:

    case spv::Op::OpConstantSampler:

    case spv::Op::OpConstantNull:

    case spv::Op::OpConstantFunctionPointerINTEL:

    case spv::Op::OpConstantStringAMDX:

    case spv::Op::OpSpecConstantTrue:

    case spv::Op::OpSpecConstantFalse:

    case spv::Op::OpSpecConstant:

    case spv::Op::OpSpecConstantComposite:

    case spv::Op::OpSpecConstantCompositeReplicateEXT:

    case spv::Op::OpSpecConstantOp:

    case spv::Op::OpSpecConstantStringAMDX:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsConstantOrUndef(const spv::Op opcode) {

  return opcode == spv::Op::OpUndef || spvOpcodeIsConstant(opcode);

}

bool spvOpcodeIsScalarSpecConstant(const spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpSpecConstantTrue:

    case spv::Op::OpSpecConstantFalse:

    case spv::Op::OpSpecConstant:

      return true;

    default:

      return false;

  }

}

int32_t spvOpcodeIsComposite(const spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpTypeVector:

    case spv::Op::OpTypeMatrix:

    case spv::Op::OpTypeArray:

    case spv::Op::OpTypeStruct:

    case spv::Op::OpTypeRuntimeArray:

    case spv::Op::OpTypeCooperativeMatrixNV:

    case spv::Op::OpTypeCooperativeMatrixKHR:

    case spv::Op::OpTypeCooperativeVectorNV:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeReturnsLogicalVariablePointer(const spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpVariable:

    case spv::Op::OpUntypedVariableKHR:

    case spv::Op::OpAccessChain:

    case spv::Op::OpInBoundsAccessChain:

    case spv::Op::OpUntypedAccessChainKHR:

    case spv::Op::OpUntypedInBoundsAccessChainKHR:

    case spv::Op::OpFunctionParameter:

    case spv::Op::OpImageTexelPointer:

    case spv::Op::OpCopyObject:

    case spv::Op::OpAllocateNodePayloadsAMDX:

    case spv::Op::OpSelect:

    case spv::Op::OpPhi:

    case spv::Op::OpFunctionCall:

    case spv::Op::OpPtrAccessChain:

    case spv::Op::OpUntypedPtrAccessChainKHR:

    case spv::Op::OpLoad:

    case spv::Op::OpConstantNull:

    case spv::Op::OpRawAccessChainNV:

      return true;

    default:

      return false;

  }

}

int32_t spvOpcodeReturnsLogicalPointer(const spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpVariable:

    case spv::Op::OpUntypedVariableKHR:

    case spv::Op::OpAccessChain:

    case spv::Op::OpInBoundsAccessChain:

    case spv::Op::OpUntypedAccessChainKHR:

    case spv::Op::OpUntypedInBoundsAccessChainKHR:

    case spv::Op::OpFunctionParameter:

    case spv::Op::OpImageTexelPointer:

    case spv::Op::OpCopyObject:

    case spv::Op::OpRawAccessChainNV:

    case spv::Op::OpAllocateNodePayloadsAMDX:

      return true;

    default:

      return false;

  }

}

int32_t spvOpcodeGeneratesType(spv::Op op) {

  switch (op) {

    case spv::Op::OpTypeVoid:

    case spv::Op::OpTypeBool:

    case spv::Op::OpTypeInt:

    case spv::Op::OpTypeFloat:

    case spv::Op::OpTypeVector:

    case spv::Op::OpTypeMatrix:

    case spv::Op::OpTypeImage:

    case spv::Op::OpTypeSampler:

    case spv::Op::OpTypeSampledImage:

    case spv::Op::OpTypeArray:

    case spv::Op::OpTypeRuntimeArray:

    case spv::Op::OpTypeStruct:

    case spv::Op::OpTypeOpaque:

    case spv::Op::OpTypePointer:

    case spv::Op::OpTypeFunction:

    case spv::Op::OpTypeEvent:

    case spv::Op::OpTypeDeviceEvent:

    case spv::Op::OpTypeReserveId:

    case spv::Op::OpTypeQueue:

    case spv::Op::OpTypePipe:

    case spv::Op::OpTypePipeStorage:

    case spv::Op::OpTypeNamedBarrier:

    case spv::Op::OpTypeAccelerationStructureNV:

    case spv::Op::OpTypeCooperativeMatrixNV:

    case spv::Op::OpTypeCooperativeMatrixKHR:

    case spv::Op::OpTypeCooperativeVectorNV:

    // case spv::Op::OpTypeAccelerationStructureKHR: covered by

    // spv::Op::OpTypeAccelerationStructureNV

    case spv::Op::OpTypeRayQueryKHR:

    case spv::Op::OpTypeHitObjectNV:

    case spv::Op::OpTypeUntypedPointerKHR:

    case spv::Op::OpTypeNodePayloadArrayAMDX:

    case spv::Op::OpTypeTensorLayoutNV:

    case spv::Op::OpTypeTensorViewNV:

    case spv::Op::OpTypeTensorARM:

    case spv::Op::OpTypeTaskSequenceINTEL:

      return true;

    default:

      // In particular, OpTypeForwardPointer does not generate a type,

      // but declares a storage class for a pointer type generated

      // by a different instruction.

      break;

  }

  return 0;

}

bool spvOpcodeIsDecoration(const spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpDecorate:

    case spv::Op::OpDecorateId:

    case spv::Op::OpMemberDecorate:

    case spv::Op::OpGroupDecorate:

    case spv::Op::OpGroupMemberDecorate:

    case spv::Op::OpDecorateStringGOOGLE:

    case spv::Op::OpMemberDecorateStringGOOGLE:

      return true;

    default:

      break;

  }

  return false;

}

bool spvOpcodeIsLoad(const spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpLoad:

    case spv::Op::OpImageSampleExplicitLod:

    case spv::Op::OpImageSampleImplicitLod:

    case spv::Op::OpImageSampleDrefImplicitLod:

    case spv::Op::OpImageSampleDrefExplicitLod:

    case spv::Op::OpImageSampleProjImplicitLod:

    case spv::Op::OpImageSampleProjExplicitLod:

    case spv::Op::OpImageSampleProjDrefImplicitLod:

    case spv::Op::OpImageSampleProjDrefExplicitLod:

    case spv::Op::OpImageSampleFootprintNV:

    case spv::Op::OpImageFetch:

    case spv::Op::OpImageGather:

    case spv::Op::OpImageDrefGather:

    case spv::Op::OpImageRead:

    case spv::Op::OpImageSparseSampleImplicitLod:

    case spv::Op::OpImageSparseSampleExplicitLod:

    case spv::Op::OpImageSparseSampleDrefExplicitLod:

    case spv::Op::OpImageSparseSampleDrefImplicitLod:

    case spv::Op::OpImageSparseFetch:

    case spv::Op::OpImageSparseGather:

    case spv::Op::OpImageSparseDrefGather:

    case spv::Op::OpImageSparseRead:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsBranch(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpBranch:

    case spv::Op::OpBranchConditional:

    case spv::Op::OpSwitch:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsAtomicWithLoad(const spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpAtomicLoad:

    case spv::Op::OpAtomicExchange:

    case spv::Op::OpAtomicCompareExchange:

    case spv::Op::OpAtomicCompareExchangeWeak:

    case spv::Op::OpAtomicIIncrement:

    case spv::Op::OpAtomicIDecrement:

    case spv::Op::OpAtomicIAdd:

    case spv::Op::OpAtomicFAddEXT:

    case spv::Op::OpAtomicISub:

    case spv::Op::OpAtomicSMin:

    case spv::Op::OpAtomicUMin:

    case spv::Op::OpAtomicFMinEXT:

    case spv::Op::OpAtomicSMax:

    case spv::Op::OpAtomicUMax:

    case spv::Op::OpAtomicFMaxEXT:

    case spv::Op::OpAtomicAnd:

    case spv::Op::OpAtomicOr:

    case spv::Op::OpAtomicXor:

    case spv::Op::OpAtomicFlagTestAndSet:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsAtomicOp(const spv::Op opcode) {

  return (spvOpcodeIsAtomicWithLoad(opcode) ||

          opcode == spv::Op::OpAtomicStore ||

          opcode == spv::Op::OpAtomicFlagClear);

}

bool spvOpcodeIsReturn(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpReturn:

    case spv::Op::OpReturnValue:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsAbort(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpKill:

    case spv::Op::OpUnreachable:

    case spv::Op::OpTerminateInvocation:

    case spv::Op::OpTerminateRayKHR:

    case spv::Op::OpIgnoreIntersectionKHR:

    case spv::Op::OpEmitMeshTasksEXT:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsReturnOrAbort(spv::Op opcode) {

  return spvOpcodeIsReturn(opcode) || spvOpcodeIsAbort(opcode);

}

bool spvOpcodeIsBlockTerminator(spv::Op opcode) {

  return spvOpcodeIsBranch(opcode) || spvOpcodeIsReturnOrAbort(opcode);

}

bool spvOpcodeIsBaseOpaqueType(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpTypeImage:

    case spv::Op::OpTypeSampler:

    case spv::Op::OpTypeSampledImage:

    case spv::Op::OpTypeOpaque:

    case spv::Op::OpTypeEvent:

    case spv::Op::OpTypeDeviceEvent:

    case spv::Op::OpTypeReserveId:

    case spv::Op::OpTypeQueue:

    case spv::Op::OpTypePipe:

    case spv::Op::OpTypeForwardPointer:

    case spv::Op::OpTypePipeStorage:

    case spv::Op::OpTypeNamedBarrier:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsNonUniformGroupOperation(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpGroupNonUniformElect:

    case spv::Op::OpGroupNonUniformAll:

    case spv::Op::OpGroupNonUniformAny:

    case spv::Op::OpGroupNonUniformAllEqual:

    case spv::Op::OpGroupNonUniformBroadcast:

    case spv::Op::OpGroupNonUniformBroadcastFirst:

    case spv::Op::OpGroupNonUniformBallot:

    case spv::Op::OpGroupNonUniformInverseBallot:

    case spv::Op::OpGroupNonUniformBallotBitExtract:

    case spv::Op::OpGroupNonUniformBallotBitCount:

    case spv::Op::OpGroupNonUniformBallotFindLSB:

    case spv::Op::OpGroupNonUniformBallotFindMSB:

    case spv::Op::OpGroupNonUniformShuffle:

    case spv::Op::OpGroupNonUniformShuffleXor:

    case spv::Op::OpGroupNonUniformShuffleUp:

    case spv::Op::OpGroupNonUniformShuffleDown:

    case spv::Op::OpGroupNonUniformIAdd:

    case spv::Op::OpGroupNonUniformFAdd:

    case spv::Op::OpGroupNonUniformIMul:

    case spv::Op::OpGroupNonUniformFMul:

    case spv::Op::OpGroupNonUniformSMin:

    case spv::Op::OpGroupNonUniformUMin:

    case spv::Op::OpGroupNonUniformFMin:

    case spv::Op::OpGroupNonUniformSMax:

    case spv::Op::OpGroupNonUniformUMax:

    case spv::Op::OpGroupNonUniformFMax:

    case spv::Op::OpGroupNonUniformBitwiseAnd:

    case spv::Op::OpGroupNonUniformBitwiseOr:

    case spv::Op::OpGroupNonUniformBitwiseXor:

    case spv::Op::OpGroupNonUniformLogicalAnd:

    case spv::Op::OpGroupNonUniformLogicalOr:

    case spv::Op::OpGroupNonUniformLogicalXor:

    case spv::Op::OpGroupNonUniformQuadBroadcast:

    case spv::Op::OpGroupNonUniformQuadSwap:

    case spv::Op::OpGroupNonUniformRotateKHR:

    case spv::Op::OpGroupNonUniformQuadAllKHR:

    case spv::Op::OpGroupNonUniformQuadAnyKHR:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsScalarizable(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpPhi:

    case spv::Op::OpCopyObject:

    case spv::Op::OpConvertFToU:

    case spv::Op::OpConvertFToS:

    case spv::Op::OpConvertSToF:

    case spv::Op::OpConvertUToF:

    case spv::Op::OpUConvert:

    case spv::Op::OpSConvert:

    case spv::Op::OpFConvert:

    case spv::Op::OpQuantizeToF16:

    case spv::Op::OpVectorInsertDynamic:

    case spv::Op::OpSNegate:

    case spv::Op::OpFNegate:

    case spv::Op::OpIAdd:

    case spv::Op::OpFAdd:

    case spv::Op::OpISub:

    case spv::Op::OpFSub:

    case spv::Op::OpIMul:

    case spv::Op::OpFMul:

    case spv::Op::OpUDiv:

    case spv::Op::OpSDiv:

    case spv::Op::OpFDiv:

    case spv::Op::OpUMod:

    case spv::Op::OpSRem:

    case spv::Op::OpSMod:

    case spv::Op::OpFRem:

    case spv::Op::OpFMod:

    case spv::Op::OpVectorTimesScalar:

    case spv::Op::OpIAddCarry:

    case spv::Op::OpISubBorrow:

    case spv::Op::OpUMulExtended:

    case spv::Op::OpSMulExtended:

    case spv::Op::OpShiftRightLogical:

    case spv::Op::OpShiftRightArithmetic:

    case spv::Op::OpShiftLeftLogical:

    case spv::Op::OpBitwiseOr:

    case spv::Op::OpBitwiseAnd:

    case spv::Op::OpNot:

    case spv::Op::OpBitFieldInsert:

    case spv::Op::OpBitFieldSExtract:

    case spv::Op::OpBitFieldUExtract:

    case spv::Op::OpBitReverse:

    case spv::Op::OpBitCount:

    case spv::Op::OpIsNan:

    case spv::Op::OpIsInf:

    case spv::Op::OpIsFinite:

    case spv::Op::OpIsNormal:

    case spv::Op::OpSignBitSet:

    case spv::Op::OpLessOrGreater:

    case spv::Op::OpOrdered:

    case spv::Op::OpUnordered:

    case spv::Op::OpLogicalEqual:

    case spv::Op::OpLogicalNotEqual:

    case spv::Op::OpLogicalOr:

    case spv::Op::OpLogicalAnd:

    case spv::Op::OpLogicalNot:

    case spv::Op::OpSelect:

    case spv::Op::OpIEqual:

    case spv::Op::OpINotEqual:

    case spv::Op::OpUGreaterThan:

    case spv::Op::OpSGreaterThan:

    case spv::Op::OpUGreaterThanEqual:

    case spv::Op::OpSGreaterThanEqual:

    case spv::Op::OpULessThan:

    case spv::Op::OpSLessThan:

    case spv::Op::OpULessThanEqual:

    case spv::Op::OpSLessThanEqual:

    case spv::Op::OpFOrdEqual:

    case spv::Op::OpFUnordEqual:

    case spv::Op::OpFOrdNotEqual:

    case spv::Op::OpFUnordNotEqual:

    case spv::Op::OpFOrdLessThan:

    case spv::Op::OpFUnordLessThan:

    case spv::Op::OpFOrdGreaterThan:

    case spv::Op::OpFUnordGreaterThan:

    case spv::Op::OpFOrdLessThanEqual:

    case spv::Op::OpFUnordLessThanEqual:

    case spv::Op::OpFOrdGreaterThanEqual:

    case spv::Op::OpFUnordGreaterThanEqual:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsDebug(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpName:

    case spv::Op::OpMemberName:

    case spv::Op::OpSource:

    case spv::Op::OpSourceContinued:

    case spv::Op::OpSourceExtension:

    case spv::Op::OpString:

    case spv::Op::OpLine:

    case spv::Op::OpNoLine:

    case spv::Op::OpModuleProcessed:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsCommutativeBinaryOperator(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpPtrEqual:

    case spv::Op::OpPtrNotEqual:

    case spv::Op::OpIAdd:

    case spv::Op::OpFAdd:

    case spv::Op::OpIMul:

    case spv::Op::OpFMul:

    case spv::Op::OpDot:

    case spv::Op::OpIAddCarry:

    case spv::Op::OpUMulExtended:

    case spv::Op::OpSMulExtended:

    case spv::Op::OpBitwiseOr:

    case spv::Op::OpBitwiseXor:

    case spv::Op::OpBitwiseAnd:

    case spv::Op::OpOrdered:

    case spv::Op::OpUnordered:

    case spv::Op::OpLogicalEqual:

    case spv::Op::OpLogicalNotEqual:

    case spv::Op::OpLogicalOr:

    case spv::Op::OpLogicalAnd:

    case spv::Op::OpIEqual:

    case spv::Op::OpINotEqual:

    case spv::Op::OpFOrdEqual:

    case spv::Op::OpFUnordEqual:

    case spv::Op::OpFOrdNotEqual:

    case spv::Op::OpFUnordNotEqual:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsLinearAlgebra(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpTranspose:

    case spv::Op::OpVectorTimesScalar:

    case spv::Op::OpMatrixTimesScalar:

    case spv::Op::OpVectorTimesMatrix:

    case spv::Op::OpMatrixTimesVector:

    case spv::Op::OpMatrixTimesMatrix:

    case spv::Op::OpOuterProduct:

    case spv::Op::OpDot:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsImageSample(const spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpImageSampleImplicitLod:

    case spv::Op::OpImageSampleExplicitLod:

    case spv::Op::OpImageSampleDrefImplicitLod:

    case spv::Op::OpImageSampleDrefExplicitLod:

    case spv::Op::OpImageSampleProjImplicitLod:

    case spv::Op::OpImageSampleProjExplicitLod:

    case spv::Op::OpImageSampleProjDrefImplicitLod:

    case spv::Op::OpImageSampleProjDrefExplicitLod:

    case spv::Op::OpImageSparseSampleImplicitLod:

    case spv::Op::OpImageSparseSampleExplicitLod:

    case spv::Op::OpImageSparseSampleDrefImplicitLod:

    case spv::Op::OpImageSparseSampleDrefExplicitLod:

    case spv::Op::OpImageSampleFootprintNV:

      return true;

    default:

      return false;

  }

}

bool spvIsExtendedInstruction(const spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpExtInst:

    case spv::Op::OpExtInstWithForwardRefsKHR:

      return true;

    default:

      return false;

  }

}

std::vector<uint32_t> spvOpcodeMemorySemanticsOperandIndices(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpMemoryBarrier:

      return {1};

    case spv::Op::OpAtomicStore:

    case spv::Op::OpControlBarrier:

    case spv::Op::OpAtomicFlagClear:

    case spv::Op::OpMemoryNamedBarrier:

      return {2};

    case spv::Op::OpAtomicLoad:

    case spv::Op::OpAtomicExchange:

    case spv::Op::OpAtomicIIncrement:

    case spv::Op::OpAtomicIDecrement:

    case spv::Op::OpAtomicIAdd:

    case spv::Op::OpAtomicFAddEXT:

    case spv::Op::OpAtomicISub:

    case spv::Op::OpAtomicSMin:

    case spv::Op::OpAtomicUMin:

    case spv::Op::OpAtomicSMax:

    case spv::Op::OpAtomicUMax:

    case spv::Op::OpAtomicAnd:

    case spv::Op::OpAtomicOr:

    case spv::Op::OpAtomicXor:

    case spv::Op::OpAtomicFlagTestAndSet:

      return {4};

    case spv::Op::OpAtomicCompareExchange:

    case spv::Op::OpAtomicCompareExchangeWeak:

      return {4, 5};

    default:

      return {};

  }

}

bool spvOpcodeIsAccessChain(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpAccessChain:

    case spv::Op::OpInBoundsAccessChain:

    case spv::Op::OpPtrAccessChain:

    case spv::Op::OpInBoundsPtrAccessChain:

    case spv::Op::OpRawAccessChainNV:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeIsBit(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpShiftRightLogical:

    case spv::Op::OpShiftRightArithmetic:

    case spv::Op::OpShiftLeftLogical:

    case spv::Op::OpBitwiseOr:

    case spv::Op::OpBitwiseXor:

    case spv::Op::OpBitwiseAnd:

    case spv::Op::OpNot:

    case spv::Op::OpBitReverse:

    case spv::Op::OpBitCount:

      return true;

    default:

      return false;

  }

}

bool spvOpcodeGeneratesUntypedPointer(spv::Op opcode) {

  switch (opcode) {

    case spv::Op::OpUntypedVariableKHR:

    case spv::Op::OpUntypedAccessChainKHR:

    case spv::Op::OpUntypedInBoundsAccessChainKHR:

    case spv::Op::OpUntypedPtrAccessChainKHR:

    case spv::Op::OpUntypedInBoundsPtrAccessChainKHR:

      return true;

    default:

      return false;

  }

}