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      1 /* Copyright 2018 The TensorFlow Authors. All Rights Reserved.
      2 
      3 Licensed under the Apache License, Version 2.0 (the "License");
      4 you may not use this file except in compliance with the License.
      5 You may obtain a copy of the License at
      6 
      7     http://www.apache.org/licenses/LICENSE-2.0
      8 
      9 Unless required by applicable law or agreed to in writing, software
     10 distributed under the License is distributed on an "AS IS" BASIS,
     11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 See the License for the specific language governing permissions and
     13 limitations under the License.
     14 ==============================================================================*/
     15 
     16 #ifndef TENSORFLOW_COMPILER_XLA_SERVICE_CPU_TARGET_MACHINE_FEATURES_FAKE_H_
     17 #define TENSORFLOW_COMPILER_XLA_SERVICE_CPU_TARGET_MACHINE_FEATURES_FAKE_H_
     18 
     19 #include "tensorflow/compiler/xla/service/cpu/target_machine_features.h"
     20 
     21 namespace xla {
     22 namespace cpu {
     23 // Delegates calls to minimum_alignment_for_allocation to a user provided
     24 // std::function, crashes on all other methods.
     25 //
     26 // Primarily useful for testing.
     27 class TargetMachineFeaturesWithFakeAlignmentLogic
     28     : public TargetMachineFeatures {
     29  public:
     30   explicit TargetMachineFeaturesWithFakeAlignmentLogic(
     31       std::function<int64(int64)> fake_alignment_logic)
     32       : fake_alignment_logic_(std::move(fake_alignment_logic)) {}
     33 
     34   int vectorization_factor_in_bytes() const override {
     35     LOG(FATAL) << "Unexpected call to " << __func__;
     36   }
     37 
     38   int vector_register_byte_size(const llvm::Function& function) const override {
     39     LOG(FATAL) << "Unexpected call to " << __func__;
     40   }
     41 
     42   int vector_register_num_elements(const llvm::Function& function,
     43                                    PrimitiveType type) const override {
     44     LOG(FATAL) << "Unexpected call to " << __func__;
     45   }
     46 
     47   int64 minimum_alignment_for_allocation(int64 size_bytes) const override {
     48     return fake_alignment_logic_(size_bytes);
     49   }
     50 
     51  private:
     52   std::function<int64(int64)> fake_alignment_logic_;
     53 };
     54 }  // namespace cpu
     55 }  // namespace xla
     56 
     57 #endif  // TENSORFLOW_COMPILER_XLA_SERVICE_CPU_TARGET_MACHINE_FEATURES_FAKE_H_
     58