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// Copyright (c) 2017 Google Inc.
// Modifications Copyright (C) 2020 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.
// Validates correctness of atomic SPIR-V instructions.
#include "source/val/validate.h"
#include "source/diagnostic.h"
#include "source/opcode.h"
#include "source/spirv_target_env.h"
#include "source/util/bitutils.h"
#include "source/val/instruction.h"
#include "source/val/validate_memory_semantics.h"
#include "source/val/validate_scopes.h"
#include "source/val/validation_state.h"
namespace {
bool IsStorageClassAllowedByUniversalRules(spv::StorageClass storage_class) {
switch (storage_class) {
case spv::StorageClass::Uniform:
case spv::StorageClass::StorageBuffer:
case spv::StorageClass::Workgroup:
case spv::StorageClass::CrossWorkgroup:
case spv::StorageClass::Generic:
case spv::StorageClass::AtomicCounter:
case spv::StorageClass::Image:
case spv::StorageClass::Function:
case spv::StorageClass::PhysicalStorageBuffer:
case spv::StorageClass::TaskPayloadWorkgroupEXT:
return true;
break;
default:
return false;
}
}
bool HasReturnType(spv::Op opcode) {
switch (opcode) {
case spv::Op::OpAtomicStore:
case spv::Op::OpAtomicFlagClear:
return false;
break;
default:
return true;
}
}
bool HasOnlyFloatReturnType(spv::Op opcode) {
switch (opcode) {
case spv::Op::OpAtomicFAddEXT:
case spv::Op::OpAtomicFMinEXT:
case spv::Op::OpAtomicFMaxEXT:
return true;
break;
default:
return false;
}
}
bool HasOnlyIntReturnType(spv::Op opcode) {
switch (opcode) {
case spv::Op::OpAtomicCompareExchange:
case spv::Op::OpAtomicCompareExchangeWeak:
case spv::Op::OpAtomicIIncrement:
case spv::Op::OpAtomicIDecrement:
case spv::Op::OpAtomicIAdd:
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:
return true;
break;
default:
return false;
}
}
bool HasIntOrFloatReturnType(spv::Op opcode) {
switch (opcode) {
case spv::Op::OpAtomicLoad:
case spv::Op::OpAtomicExchange:
return true;
break;
default:
return false;
}
}
bool HasOnlyBoolReturnType(spv::Op opcode) {
switch (opcode) {
case spv::Op::OpAtomicFlagTestAndSet:
return true;
break;
default:
return false;
}
}
} // namespace
namespace spvtools {
namespace val {
// Validates correctness of atomic instructions.
spv_result_t AtomicsPass(ValidationState_t& _, const Instruction* inst) {
const spv::Op opcode = inst->opcode();
switch (opcode) {
case spv::Op::OpAtomicLoad:
case spv::Op::OpAtomicStore:
case spv::Op::OpAtomicExchange:
case spv::Op::OpAtomicFAddEXT:
case spv::Op::OpAtomicCompareExchange:
case spv::Op::OpAtomicCompareExchangeWeak:
case spv::Op::OpAtomicIIncrement:
case spv::Op::OpAtomicIDecrement:
case spv::Op::OpAtomicIAdd:
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:
case spv::Op::OpAtomicFlagClear: {
const uint32_t result_type = inst->type_id();
// All current atomics only are scalar result
// Validate return type first so can just check if pointer type is same
// (if applicable)
if (HasReturnType(opcode)) {
if (HasOnlyFloatReturnType(opcode) &&
!_.IsFloatScalarType(result_type)) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": expected Result Type to be float scalar type";
} else if (HasOnlyIntReturnType(opcode) &&
!_.IsIntScalarType(result_type)) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": expected Result Type to be integer scalar type";
} else if (HasIntOrFloatReturnType(opcode) &&
!_.IsFloatScalarType(result_type) &&
!_.IsIntScalarType(result_type)) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": expected Result Type to be integer or float scalar type";
} else if (HasOnlyBoolReturnType(opcode) &&
!_.IsBoolScalarType(result_type)) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": expected Result Type to be bool scalar type";
}
}
uint32_t operand_index = HasReturnType(opcode) ? 2 : 0;
const uint32_t pointer_type = _.GetOperandTypeId(inst, operand_index++);
uint32_t data_type = 0;
spv::StorageClass storage_class;
if (!_.GetPointerTypeInfo(pointer_type, &data_type, &storage_class)) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": expected Pointer to be of type OpTypePointer";
}
// Can't use result_type because OpAtomicStore doesn't have a result
if (_.IsIntScalarType(data_type) && _.GetBitWidth(data_type) == 64 &&
!_.HasCapability(spv::Capability::Int64Atomics)) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": 64-bit atomics require the Int64Atomics capability";
}
// Validate storage class against universal rules
if (!IsStorageClassAllowedByUniversalRules(storage_class)) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": storage class forbidden by universal validation rules.";
}
// Then Shader rules
if (_.HasCapability(spv::Capability::Shader)) {
// Vulkan environment rule
if (spvIsVulkanEnv(_.context()->target_env)) {
if ((storage_class != spv::StorageClass::Uniform) &&
(storage_class != spv::StorageClass::StorageBuffer) &&
(storage_class != spv::StorageClass::Workgroup) &&
(storage_class != spv::StorageClass::Image) &&
(storage_class != spv::StorageClass::PhysicalStorageBuffer) &&
(storage_class != spv::StorageClass::TaskPayloadWorkgroupEXT)) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< _.VkErrorID(4686) << spvOpcodeString(opcode)
<< ": Vulkan spec only allows storage classes for atomic to "
"be: Uniform, Workgroup, Image, StorageBuffer, "
"PhysicalStorageBuffer or TaskPayloadWorkgroupEXT.";
}
} else if (storage_class == spv::StorageClass::Function) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": Function storage class forbidden when the Shader "
"capability is declared.";
}
if (opcode == spv::Op::OpAtomicFAddEXT) {
// result type being float checked already
if ((_.GetBitWidth(result_type) == 16) &&
(!_.HasCapability(spv::Capability::AtomicFloat16AddEXT))) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": float add atomics require the AtomicFloat32AddEXT "
"capability";
}
if ((_.GetBitWidth(result_type) == 32) &&
(!_.HasCapability(spv::Capability::AtomicFloat32AddEXT))) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": float add atomics require the AtomicFloat32AddEXT "
"capability";
}
if ((_.GetBitWidth(result_type) == 64) &&
(!_.HasCapability(spv::Capability::AtomicFloat64AddEXT))) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": float add atomics require the AtomicFloat64AddEXT "
"capability";
}
} else if (opcode == spv::Op::OpAtomicFMinEXT ||
opcode == spv::Op::OpAtomicFMaxEXT) {
if ((_.GetBitWidth(result_type) == 16) &&
(!_.HasCapability(spv::Capability::AtomicFloat16MinMaxEXT))) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": float min/max atomics require the "
"AtomicFloat16MinMaxEXT capability";
}
if ((_.GetBitWidth(result_type) == 32) &&
(!_.HasCapability(spv::Capability::AtomicFloat32MinMaxEXT))) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": float min/max atomics require the "
"AtomicFloat32MinMaxEXT capability";
}
if ((_.GetBitWidth(result_type) == 64) &&
(!_.HasCapability(spv::Capability::AtomicFloat64MinMaxEXT))) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": float min/max atomics require the "
"AtomicFloat64MinMaxEXT capability";
}
}
}
// And finally OpenCL environment rules
if (spvIsOpenCLEnv(_.context()->target_env)) {
if ((storage_class != spv::StorageClass::Function) &&
(storage_class != spv::StorageClass::Workgroup) &&
(storage_class != spv::StorageClass::CrossWorkgroup) &&
(storage_class != spv::StorageClass::Generic)) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": storage class must be Function, Workgroup, "
"CrossWorkGroup or Generic in the OpenCL environment.";
}
if (_.context()->target_env == SPV_ENV_OPENCL_1_2) {
if (storage_class == spv::StorageClass::Generic) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Storage class cannot be Generic in OpenCL 1.2 "
"environment";
}
}
}
// If result and pointer type are different, need to do special check here
if (opcode == spv::Op::OpAtomicFlagTestAndSet ||
opcode == spv::Op::OpAtomicFlagClear) {
if (!_.IsIntScalarType(data_type) || _.GetBitWidth(data_type) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": expected Pointer to point to a value of 32-bit integer "
"type";
}
} else if (opcode == spv::Op::OpAtomicStore) {
if (!_.IsFloatScalarType(data_type) && !_.IsIntScalarType(data_type)) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": expected Pointer to be a pointer to integer or float "
<< "scalar type";
}
} else if (data_type != result_type) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": expected Pointer to point to a value of type Result "
"Type";
}
auto memory_scope = inst->GetOperandAs<const uint32_t>(operand_index++);
if (auto error = ValidateMemoryScope(_, inst, memory_scope)) {
return error;
}
const auto equal_semantics_index = operand_index++;
if (auto error = ValidateMemorySemantics(_, inst, equal_semantics_index,
memory_scope))
return error;
if (opcode == spv::Op::OpAtomicCompareExchange ||
opcode == spv::Op::OpAtomicCompareExchangeWeak) {
const auto unequal_semantics_index = operand_index++;
if (auto error = ValidateMemorySemantics(
_, inst, unequal_semantics_index, memory_scope))
return error;
// Volatile bits must match for equal and unequal semantics. Previous
// checks guarantee they are 32-bit constants, but we need to recheck
// whether they are evaluatable constants.
bool is_int32 = false;
bool is_equal_const = false;
bool is_unequal_const = false;
uint32_t equal_value = 0;
uint32_t unequal_value = 0;
std::tie(is_int32, is_equal_const, equal_value) = _.EvalInt32IfConst(
inst->GetOperandAs<uint32_t>(equal_semantics_index));
std::tie(is_int32, is_unequal_const, unequal_value) =
_.EvalInt32IfConst(
inst->GetOperandAs<uint32_t>(unequal_semantics_index));
if (is_equal_const && is_unequal_const &&
((equal_value & uint32_t(spv::MemorySemanticsMask::Volatile)) ^
(unequal_value & uint32_t(spv::MemorySemanticsMask::Volatile)))) {
return _.diag(SPV_ERROR_INVALID_ID, inst)
<< "Volatile mask setting must match for Equal and Unequal "
"memory semantics";
}
}
if (opcode == spv::Op::OpAtomicStore) {
const uint32_t value_type = _.GetOperandTypeId(inst, 3);
if (value_type != data_type) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": expected Value type and the type pointed to by "
"Pointer to be the same";
}
} else if (opcode != spv::Op::OpAtomicLoad &&
opcode != spv::Op::OpAtomicIIncrement &&
opcode != spv::Op::OpAtomicIDecrement &&
opcode != spv::Op::OpAtomicFlagTestAndSet &&
opcode != spv::Op::OpAtomicFlagClear) {
const uint32_t value_type = _.GetOperandTypeId(inst, operand_index++);
if (value_type != result_type) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": expected Value to be of type Result Type";
}
}
if (opcode == spv::Op::OpAtomicCompareExchange ||
opcode == spv::Op::OpAtomicCompareExchangeWeak) {
const uint32_t comparator_type =
_.GetOperandTypeId(inst, operand_index++);
if (comparator_type != result_type) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< spvOpcodeString(opcode)
<< ": expected Comparator to be of type Result Type";
}
}
break;
}
default:
break;
}
return SPV_SUCCESS;
}
} // namespace val
} // namespace spvtools