anki-3d-engine/ThirdParty/SpirvTools/source/val/validate_conversion.cpp

// Copyright (c) 2017 Google Inc.
//
// 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.

// Validates correctness of conversion instructions.

#include "source/diagnostic.h"
#include "source/opcode.h"
#include "source/spirv_constant.h"
#include "source/spirv_target_env.h"
#include "source/val/instruction.h"
#include "source/val/validate.h"
#include "source/val/validation_state.h"

namespace spvtools {
namespace val {

// Validates correctness of conversion instructions.
spv_result_t ConversionPass(ValidationState_t& _, const Instruction* inst) {
  const spv::Op opcode = inst->opcode();
  const uint32_t result_type = inst->type_id();

  switch (opcode) {
    case spv::Op::OpConvertFToU: {
      if (!_.IsUnsignedIntScalarType(result_type) &&
          !_.IsUnsignedIntVectorType(result_type) &&
          !_.IsUnsignedIntCooperativeMatrixType(result_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected unsigned int scalar or vector type as Result Type: "
               << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      if (!input_type || (!_.IsFloatScalarType(input_type) &&
                          !_.IsFloatVectorType(input_type) &&
                          !_.IsFloatCooperativeMatrixType(input_type)))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to be float scalar or vector: "
               << spvOpcodeString(opcode);

      if (_.IsCooperativeMatrixType(result_type) ||
          _.IsCooperativeMatrixType(input_type)) {
        spv_result_t ret =
            _.CooperativeMatrixShapesMatch(inst, result_type, input_type);
        if (ret != SPV_SUCCESS) return ret;
      } else {
        if (_.GetDimension(result_type) != _.GetDimension(input_type))
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Expected input to have the same dimension as Result Type: "
                 << spvOpcodeString(opcode);
      }

      break;
    }

    case spv::Op::OpConvertFToS: {
      if (!_.IsIntScalarType(result_type) && !_.IsIntVectorType(result_type) &&
          !_.IsIntCooperativeMatrixType(result_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected int scalar or vector type as Result Type: "
               << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      if (!input_type || (!_.IsFloatScalarType(input_type) &&
                          !_.IsFloatVectorType(input_type) &&
                          !_.IsFloatCooperativeMatrixType(input_type)))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to be float scalar or vector: "
               << spvOpcodeString(opcode);

      if (_.IsCooperativeMatrixType(result_type) ||
          _.IsCooperativeMatrixType(input_type)) {
        spv_result_t ret =
            _.CooperativeMatrixShapesMatch(inst, result_type, input_type);
        if (ret != SPV_SUCCESS) return ret;
      } else {
        if (_.GetDimension(result_type) != _.GetDimension(input_type))
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Expected input to have the same dimension as Result Type: "
                 << spvOpcodeString(opcode);
      }

      break;
    }

    case spv::Op::OpConvertSToF:
    case spv::Op::OpConvertUToF: {
      if (!_.IsFloatScalarType(result_type) &&
          !_.IsFloatVectorType(result_type) &&
          !_.IsFloatCooperativeMatrixType(result_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected float scalar or vector type as Result Type: "
               << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      if (!input_type ||
          (!_.IsIntScalarType(input_type) && !_.IsIntVectorType(input_type) &&
           !_.IsIntCooperativeMatrixType(input_type)))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to be int scalar or vector: "
               << spvOpcodeString(opcode);

      if (_.IsCooperativeMatrixType(result_type) ||
          _.IsCooperativeMatrixType(input_type)) {
        spv_result_t ret =
            _.CooperativeMatrixShapesMatch(inst, result_type, input_type);
        if (ret != SPV_SUCCESS) return ret;
      } else {
        if (_.GetDimension(result_type) != _.GetDimension(input_type))
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Expected input to have the same dimension as Result Type: "
                 << spvOpcodeString(opcode);
      }

      break;
    }

    case spv::Op::OpUConvert: {
      if (!_.IsUnsignedIntScalarType(result_type) &&
          !_.IsUnsignedIntVectorType(result_type) &&
          !_.IsUnsignedIntCooperativeMatrixType(result_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected unsigned int scalar or vector type as Result Type: "
               << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      if (!input_type ||
          (!_.IsIntScalarType(input_type) && !_.IsIntVectorType(input_type) &&
           !_.IsIntCooperativeMatrixType(input_type)))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to be int scalar or vector: "
               << spvOpcodeString(opcode);

      if (_.IsCooperativeMatrixType(result_type) ||
          _.IsCooperativeMatrixType(input_type)) {
        spv_result_t ret =
            _.CooperativeMatrixShapesMatch(inst, result_type, input_type);
        if (ret != SPV_SUCCESS) return ret;
      } else {
        if (_.GetDimension(result_type) != _.GetDimension(input_type))
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Expected input to have the same dimension as Result Type: "
                 << spvOpcodeString(opcode);
      }

      if (_.GetBitWidth(result_type) == _.GetBitWidth(input_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to have different bit width from Result "
                  "Type: "
               << spvOpcodeString(opcode);
      break;
    }

    case spv::Op::OpSConvert: {
      if (!_.IsIntScalarType(result_type) && !_.IsIntVectorType(result_type) &&
          !_.IsIntCooperativeMatrixType(result_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected int scalar or vector type as Result Type: "
               << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      if (!input_type ||
          (!_.IsIntScalarType(input_type) && !_.IsIntVectorType(input_type) &&
           !_.IsIntCooperativeMatrixType(input_type)))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to be int scalar or vector: "
               << spvOpcodeString(opcode);

      if (_.IsCooperativeMatrixType(result_type) ||
          _.IsCooperativeMatrixType(input_type)) {
        spv_result_t ret =
            _.CooperativeMatrixShapesMatch(inst, result_type, input_type);
        if (ret != SPV_SUCCESS) return ret;
      } else {
        if (_.GetDimension(result_type) != _.GetDimension(input_type))
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Expected input to have the same dimension as Result Type: "
                 << spvOpcodeString(opcode);
      }

      if (_.GetBitWidth(result_type) == _.GetBitWidth(input_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to have different bit width from Result "
                  "Type: "
               << spvOpcodeString(opcode);
      break;
    }

    case spv::Op::OpFConvert: {
      if (!_.IsFloatScalarType(result_type) &&
          !_.IsFloatVectorType(result_type) &&
          !_.IsFloatCooperativeMatrixType(result_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected float scalar or vector type as Result Type: "
               << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      if (!input_type || (!_.IsFloatScalarType(input_type) &&
                          !_.IsFloatVectorType(input_type) &&
                          !_.IsFloatCooperativeMatrixType(input_type)))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to be float scalar or vector: "
               << spvOpcodeString(opcode);

      if (_.IsCooperativeMatrixType(result_type) ||
          _.IsCooperativeMatrixType(input_type)) {
        spv_result_t ret =
            _.CooperativeMatrixShapesMatch(inst, result_type, input_type);
        if (ret != SPV_SUCCESS) return ret;
      } else {
        if (_.GetDimension(result_type) != _.GetDimension(input_type))
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Expected input to have the same dimension as Result Type: "
                 << spvOpcodeString(opcode);
      }

      if (_.GetBitWidth(result_type) == _.GetBitWidth(input_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to have different bit width from Result "
                  "Type: "
               << spvOpcodeString(opcode);
      break;
    }

    case spv::Op::OpQuantizeToF16: {
      if ((!_.IsFloatScalarType(result_type) &&
           !_.IsFloatVectorType(result_type)) ||
          _.GetBitWidth(result_type) != 32)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected 32-bit float scalar or vector type as Result Type: "
               << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      if (input_type != result_type)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input type to be equal to Result Type: "
               << spvOpcodeString(opcode);
      break;
    }

    case spv::Op::OpConvertPtrToU: {
      if (!_.IsUnsignedIntScalarType(result_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected unsigned int scalar type as Result Type: "
               << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      if (!_.IsPointerType(input_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to be a pointer: " << spvOpcodeString(opcode);

      if (_.addressing_model() == spv::AddressingModel::Logical)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Logical addressing not supported: "
               << spvOpcodeString(opcode);

      if (_.addressing_model() ==
          spv::AddressingModel::PhysicalStorageBuffer64) {
        spv::StorageClass input_storage_class;
        uint32_t input_data_type = 0;
        _.GetPointerTypeInfo(input_type, &input_data_type,
                             &input_storage_class);
        if (input_storage_class != spv::StorageClass::PhysicalStorageBuffer)
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Pointer storage class must be PhysicalStorageBuffer: "
                 << spvOpcodeString(opcode);

        if (spvIsVulkanEnv(_.context()->target_env)) {
          if (_.GetBitWidth(result_type) != 64) {
            return _.diag(SPV_ERROR_INVALID_DATA, inst)
                   << _.VkErrorID(4710)
                   << "PhysicalStorageBuffer64 addressing mode requires the "
                      "result integer type to have a 64-bit width for Vulkan "
                      "environment.";
          }
        }
      }
      break;
    }

    case spv::Op::OpSatConvertSToU:
    case spv::Op::OpSatConvertUToS: {
      if (!_.IsIntScalarType(result_type) && !_.IsIntVectorType(result_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected int scalar or vector type as Result Type: "
               << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      if (!input_type ||
          (!_.IsIntScalarType(input_type) && !_.IsIntVectorType(input_type)))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected int scalar or vector as input: "
               << spvOpcodeString(opcode);

      if (_.GetDimension(result_type) != _.GetDimension(input_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to have the same dimension as Result Type: "
               << spvOpcodeString(opcode);
      break;
    }

    case spv::Op::OpConvertUToPtr: {
      if (!_.IsPointerType(result_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected Result Type to be a pointer: "
               << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      if (!input_type || !_.IsIntScalarType(input_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected int scalar as input: " << spvOpcodeString(opcode);

      if (_.addressing_model() == spv::AddressingModel::Logical)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Logical addressing not supported: "
               << spvOpcodeString(opcode);

      if (_.addressing_model() ==
          spv::AddressingModel::PhysicalStorageBuffer64) {
        spv::StorageClass result_storage_class;
        uint32_t result_data_type = 0;
        _.GetPointerTypeInfo(result_type, &result_data_type,
                             &result_storage_class);
        if (result_storage_class != spv::StorageClass::PhysicalStorageBuffer)
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Pointer storage class must be PhysicalStorageBuffer: "
                 << spvOpcodeString(opcode);

        if (spvIsVulkanEnv(_.context()->target_env)) {
          if (_.GetBitWidth(input_type) != 64) {
            return _.diag(SPV_ERROR_INVALID_DATA, inst)
                   << _.VkErrorID(4710)
                   << "PhysicalStorageBuffer64 addressing mode requires the "
                      "input integer to have a 64-bit width for Vulkan "
                      "environment.";
          }
        }
      }
      break;
    }

    case spv::Op::OpPtrCastToGeneric: {
      spv::StorageClass result_storage_class;
      uint32_t result_data_type = 0;
      if (!_.GetPointerTypeInfo(result_type, &result_data_type,
                                &result_storage_class))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected Result Type to be a pointer: "
               << spvOpcodeString(opcode);

      if (result_storage_class != spv::StorageClass::Generic)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected Result Type to have storage class Generic: "
               << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      spv::StorageClass input_storage_class;
      uint32_t input_data_type = 0;
      if (!_.GetPointerTypeInfo(input_type, &input_data_type,
                                &input_storage_class))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to be a pointer: " << spvOpcodeString(opcode);

      if (input_storage_class != spv::StorageClass::Workgroup &&
          input_storage_class != spv::StorageClass::CrossWorkgroup &&
          input_storage_class != spv::StorageClass::Function)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to have storage class Workgroup, "
               << "CrossWorkgroup or Function: " << spvOpcodeString(opcode);

      if (result_data_type != input_data_type)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input and Result Type to point to the same type: "
               << spvOpcodeString(opcode);
      break;
    }

    case spv::Op::OpGenericCastToPtr: {
      spv::StorageClass result_storage_class;
      uint32_t result_data_type = 0;
      if (!_.GetPointerTypeInfo(result_type, &result_data_type,
                                &result_storage_class))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected Result Type to be a pointer: "
               << spvOpcodeString(opcode);

      if (result_storage_class != spv::StorageClass::Workgroup &&
          result_storage_class != spv::StorageClass::CrossWorkgroup &&
          result_storage_class != spv::StorageClass::Function)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected Result Type to have storage class Workgroup, "
               << "CrossWorkgroup or Function: " << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      spv::StorageClass input_storage_class;
      uint32_t input_data_type = 0;
      if (!_.GetPointerTypeInfo(input_type, &input_data_type,
                                &input_storage_class))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to be a pointer: " << spvOpcodeString(opcode);

      if (input_storage_class != spv::StorageClass::Generic)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to have storage class Generic: "
               << spvOpcodeString(opcode);

      if (result_data_type != input_data_type)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input and Result Type to point to the same type: "
               << spvOpcodeString(opcode);
      break;
    }

    case spv::Op::OpGenericCastToPtrExplicit: {
      spv::StorageClass result_storage_class;
      uint32_t result_data_type = 0;
      if (!_.GetPointerTypeInfo(result_type, &result_data_type,
                                &result_storage_class))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected Result Type to be a pointer: "
               << spvOpcodeString(opcode);

      const auto target_storage_class =
          inst->GetOperandAs<spv::StorageClass>(3);
      if (result_storage_class != target_storage_class)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected Result Type to be of target storage class: "
               << spvOpcodeString(opcode);

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      spv::StorageClass input_storage_class;
      uint32_t input_data_type = 0;
      if (!_.GetPointerTypeInfo(input_type, &input_data_type,
                                &input_storage_class))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to be a pointer: " << spvOpcodeString(opcode);

      if (input_storage_class != spv::StorageClass::Generic)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to have storage class Generic: "
               << spvOpcodeString(opcode);

      if (result_data_type != input_data_type)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input and Result Type to point to the same type: "
               << spvOpcodeString(opcode);

      if (target_storage_class != spv::StorageClass::Workgroup &&
          target_storage_class != spv::StorageClass::CrossWorkgroup &&
          target_storage_class != spv::StorageClass::Function)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected target storage class to be Workgroup, "
               << "CrossWorkgroup or Function: " << spvOpcodeString(opcode);
      break;
    }

    case spv::Op::OpBitcast: {
      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      if (!input_type)
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to have a type: " << spvOpcodeString(opcode);

      const bool result_is_pointer = _.IsPointerType(result_type);
      const bool result_is_int_scalar = _.IsIntScalarType(result_type);
      const bool input_is_pointer = _.IsPointerType(input_type);
      const bool input_is_int_scalar = _.IsIntScalarType(input_type);

      if (!result_is_pointer && !result_is_int_scalar &&
          !_.IsIntVectorType(result_type) &&
          !_.IsFloatScalarType(result_type) &&
          !_.IsFloatVectorType(result_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected Result Type to be a pointer or int or float vector "
               << "or scalar type: " << spvOpcodeString(opcode);

      if (!input_is_pointer && !input_is_int_scalar &&
          !_.IsIntVectorType(input_type) && !_.IsFloatScalarType(input_type) &&
          !_.IsFloatVectorType(input_type))
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected input to be a pointer or int or float vector "
               << "or scalar: " << spvOpcodeString(opcode);

      if (_.version() >= SPV_SPIRV_VERSION_WORD(1, 5) ||
          _.HasExtension(kSPV_KHR_physical_storage_buffer)) {
        const bool result_is_int_vector = _.IsIntVectorType(result_type);
        const bool result_has_int32 =
            _.ContainsSizedIntOrFloatType(result_type, spv::Op::OpTypeInt, 32);
        const bool input_is_int_vector = _.IsIntVectorType(input_type);
        const bool input_has_int32 =
            _.ContainsSizedIntOrFloatType(input_type, spv::Op::OpTypeInt, 32);
        if (result_is_pointer && !input_is_pointer && !input_is_int_scalar &&
            !(input_is_int_vector && input_has_int32))
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Expected input to be a pointer, int scalar or 32-bit int "
                    "vector if Result Type is pointer: "
                 << spvOpcodeString(opcode);

        if (input_is_pointer && !result_is_pointer && !result_is_int_scalar &&
            !(result_is_int_vector && result_has_int32))
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Pointer can only be converted to another pointer, int "
                    "scalar or 32-bit int vector: "
                 << spvOpcodeString(opcode);
      } else {
        if (result_is_pointer && !input_is_pointer && !input_is_int_scalar)
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Expected input to be a pointer or int scalar if Result "
                    "Type is pointer: "
                 << spvOpcodeString(opcode);

        if (input_is_pointer && !result_is_pointer && !result_is_int_scalar)
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Pointer can only be converted to another pointer or int "
                    "scalar: "
                 << spvOpcodeString(opcode);
      }

      if (!result_is_pointer && !input_is_pointer) {
        const uint32_t result_size =
            _.GetBitWidth(result_type) * _.GetDimension(result_type);
        const uint32_t input_size =
            _.GetBitWidth(input_type) * _.GetDimension(input_type);
        if (result_size != input_size)
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "Expected input to have the same total bit width as "
                 << "Result Type: " << spvOpcodeString(opcode);
      }
      break;
    }

    case spv::Op::OpConvertUToAccelerationStructureKHR: {
      if (!_.IsAccelerationStructureType(result_type)) {
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected Result Type to be a Acceleration Structure: "
               << spvOpcodeString(opcode);
      }

      const uint32_t input_type = _.GetOperandTypeId(inst, 2);
      if (!input_type || !_.IsUnsigned64BitHandle(input_type)) {
        return _.diag(SPV_ERROR_INVALID_DATA, inst)
               << "Expected 64-bit uint scalar or 2-component 32-bit uint "
                  "vector as input: "
               << spvOpcodeString(opcode);
      }

      break;
    }

    default:
      break;
  }

  if (_.HasCapability(spv::Capability::Shader)) {
    switch (inst->opcode()) {
      case spv::Op::OpConvertFToU:
      case spv::Op::OpConvertFToS:
      case spv::Op::OpConvertSToF:
      case spv::Op::OpConvertUToF:
      case spv::Op::OpBitcast:
        if (_.ContainsLimitedUseIntOrFloatType(inst->type_id()) ||
            _.ContainsLimitedUseIntOrFloatType(_.GetOperandTypeId(inst, 2u))) {
          return _.diag(SPV_ERROR_INVALID_DATA, inst)
                 << "8- or 16-bit types can only be used with width-only "
                    "conversions";
        }
        break;
      default:
        break;
    }
  }

  return SPV_SUCCESS;
}

}  // namespace val
}  // namespace spvtools