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// Copyright (c) 2022 The Khronos Group 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 ray tracing instructions from SPV_KHR_ray_tracing
#include "source/opcode.h"
#include "source/val/instruction.h"
#include "source/val/validate.h"
#include "source/val/validation_state.h"
namespace spvtools {
namespace val {
spv_result_t RayTracingPass(ValidationState_t& _, const Instruction* inst) {
const spv::Op opcode = inst->opcode();
const uint32_t result_type = inst->type_id();
switch (opcode) {
case spv::Op::OpTraceRayKHR: {
_.function(inst->function()->id())
->RegisterExecutionModelLimitation(
[](spv::ExecutionModel model, std::string* message) {
if (model != spv::ExecutionModel::RayGenerationKHR &&
model != spv::ExecutionModel::ClosestHitKHR &&
model != spv::ExecutionModel::MissKHR) {
if (message) {
*message =
"OpTraceRayKHR requires RayGenerationKHR, "
"ClosestHitKHR and MissKHR execution models";
}
return false;
}
return true;
});
if (_.GetIdOpcode(_.GetOperandTypeId(inst, 0)) !=
spv::Op::OpTypeAccelerationStructureKHR) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Expected Acceleration Structure to be of type "
"OpTypeAccelerationStructureKHR";
}
const uint32_t ray_flags = _.GetOperandTypeId(inst, 1);
if (!_.IsIntScalarType(ray_flags) || _.GetBitWidth(ray_flags) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Ray Flags must be a 32-bit int scalar";
}
const uint32_t cull_mask = _.GetOperandTypeId(inst, 2);
if (!_.IsIntScalarType(cull_mask) || _.GetBitWidth(cull_mask) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Cull Mask must be a 32-bit int scalar";
}
const uint32_t sbt_offset = _.GetOperandTypeId(inst, 3);
if (!_.IsIntScalarType(sbt_offset) || _.GetBitWidth(sbt_offset) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "SBT Offset must be a 32-bit int scalar";
}
const uint32_t sbt_stride = _.GetOperandTypeId(inst, 4);
if (!_.IsIntScalarType(sbt_stride) || _.GetBitWidth(sbt_stride) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "SBT Stride must be a 32-bit int scalar";
}
const uint32_t miss_index = _.GetOperandTypeId(inst, 5);
if (!_.IsIntScalarType(miss_index) || _.GetBitWidth(miss_index) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Miss Index must be a 32-bit int scalar";
}
const uint32_t ray_origin = _.GetOperandTypeId(inst, 6);
if (!_.IsFloatVectorType(ray_origin) || _.GetDimension(ray_origin) != 3 ||
_.GetBitWidth(ray_origin) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Ray Origin must be a 32-bit float 3-component vector";
}
const uint32_t ray_tmin = _.GetOperandTypeId(inst, 7);
if (!_.IsFloatScalarType(ray_tmin) || _.GetBitWidth(ray_tmin) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Ray TMin must be a 32-bit float scalar";
}
const uint32_t ray_direction = _.GetOperandTypeId(inst, 8);
if (!_.IsFloatVectorType(ray_direction) ||
_.GetDimension(ray_direction) != 3 ||
_.GetBitWidth(ray_direction) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Ray Direction must be a 32-bit float 3-component vector";
}
const uint32_t ray_tmax = _.GetOperandTypeId(inst, 9);
if (!_.IsFloatScalarType(ray_tmax) || _.GetBitWidth(ray_tmax) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Ray TMax must be a 32-bit float scalar";
}
const Instruction* payload = _.FindDef(inst->GetOperandAs<uint32_t>(10));
if (payload->opcode() != spv::Op::OpVariable) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Payload must be the result of a OpVariable";
} else if (payload->GetOperandAs<spv::StorageClass>(2) !=
spv::StorageClass::RayPayloadKHR &&
payload->GetOperandAs<spv::StorageClass>(2) !=
spv::StorageClass::IncomingRayPayloadKHR) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Payload must have storage class RayPayloadKHR or "
"IncomingRayPayloadKHR";
}
break;
}
case spv::Op::OpReportIntersectionKHR: {
_.function(inst->function()->id())
->RegisterExecutionModelLimitation(
[](spv::ExecutionModel model, std::string* message) {
if (model != spv::ExecutionModel::IntersectionKHR) {
if (message) {
*message =
"OpReportIntersectionKHR requires IntersectionKHR "
"execution model";
}
return false;
}
return true;
});
if (!_.IsBoolScalarType(result_type)) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "expected Result Type to be bool scalar type";
}
const uint32_t hit = _.GetOperandTypeId(inst, 2);
if (!_.IsFloatScalarType(hit) || _.GetBitWidth(hit) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Hit must be a 32-bit int scalar";
}
const uint32_t hit_kind = _.GetOperandTypeId(inst, 3);
if (!_.IsUnsignedIntScalarType(hit_kind) ||
_.GetBitWidth(hit_kind) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Hit Kind must be a 32-bit unsigned int scalar";
}
break;
}
case spv::Op::OpExecuteCallableKHR: {
_.function(inst->function()->id())
->RegisterExecutionModelLimitation([](spv::ExecutionModel model,
std::string* message) {
if (model != spv::ExecutionModel::RayGenerationKHR &&
model != spv::ExecutionModel::ClosestHitKHR &&
model != spv::ExecutionModel::MissKHR &&
model != spv::ExecutionModel::CallableKHR) {
if (message) {
*message =
"OpExecuteCallableKHR requires RayGenerationKHR, "
"ClosestHitKHR, MissKHR and CallableKHR execution models";
}
return false;
}
return true;
});
const uint32_t sbt_index = _.GetOperandTypeId(inst, 0);
if (!_.IsUnsignedIntScalarType(sbt_index) ||
_.GetBitWidth(sbt_index) != 32) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "SBT Index must be a 32-bit unsigned int scalar";
}
const auto callable_data = _.FindDef(inst->GetOperandAs<uint32_t>(1));
if (callable_data->opcode() != spv::Op::OpVariable) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Callable Data must be the result of a OpVariable";
} else if (callable_data->GetOperandAs<spv::StorageClass>(2) !=
spv::StorageClass::CallableDataKHR &&
callable_data->GetOperandAs<spv::StorageClass>(2) !=
spv::StorageClass::IncomingCallableDataKHR) {
return _.diag(SPV_ERROR_INVALID_DATA, inst)
<< "Callable Data must have storage class CallableDataKHR or "
"IncomingCallableDataKHR";
}
break;
}
default:
break;
}
return SPV_SUCCESS;
}
} // namespace val
} // namespace spvtools
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