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- // 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 derivative SPIR-V instructions.
- #include "source/val/validate.h"
- #include <string>
- #include "source/diagnostic.h"
- #include "source/opcode.h"
- #include "source/val/instruction.h"
- #include "source/val/validation_state.h"
- namespace spvtools {
- namespace val {
- // Validates correctness of derivative instructions.
- spv_result_t DerivativesPass(ValidationState_t& _, const Instruction* inst) {
- const SpvOp opcode = inst->opcode();
- const uint32_t result_type = inst->type_id();
- switch (opcode) {
- case SpvOpDPdx:
- case SpvOpDPdy:
- case SpvOpFwidth:
- case SpvOpDPdxFine:
- case SpvOpDPdyFine:
- case SpvOpFwidthFine:
- case SpvOpDPdxCoarse:
- case SpvOpDPdyCoarse:
- case SpvOpFwidthCoarse: {
- if (!_.IsFloatScalarOrVectorType(result_type)) {
- return _.diag(SPV_ERROR_INVALID_DATA, inst)
- << "Expected Result Type to be float scalar or vector type: "
- << spvOpcodeString(opcode);
- }
- const uint32_t p_type = _.GetOperandTypeId(inst, 2);
- if (p_type != result_type) {
- return _.diag(SPV_ERROR_INVALID_DATA, inst)
- << "Expected P type and Result Type to be the same: "
- << spvOpcodeString(opcode);
- }
- const spvtools::Extension compute_shader_derivatives_extension =
- kSPV_NV_compute_shader_derivatives;
- ExtensionSet exts(1, &compute_shader_derivatives_extension);
- if (_.HasAnyOfExtensions(exts)) {
- _.function(inst->function()->id())
- ->RegisterExecutionModelLimitation([opcode](SpvExecutionModel model,
- std::string* message) {
- if (model != SpvExecutionModelFragment &&
- model != SpvExecutionModelGLCompute) {
- if (message) {
- *message =
- std::string(
- "Derivative instructions require Fragment execution "
- "model: ") +
- spvOpcodeString(opcode);
- }
- return false;
- }
- return true;
- });
- } else {
- _.function(inst->function()->id())
- ->RegisterExecutionModelLimitation(
- SpvExecutionModelFragment,
- std::string(
- "Derivative instructions require Fragment execution "
- "model: ") +
- spvOpcodeString(opcode));
- }
- break;
- }
- default:
- break;
- }
- return SPV_SUCCESS;
- }
- } // namespace val
- } // namespace spvtools
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