| /* Copyright 2019 Google LLC. 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. |
| ==============================================================================*/ |
| |
| #ifndef TENSORFLOW_LITE_EXPERIMENTAL_RUY_RUY_SIDE_PAIR_H_ |
| #define TENSORFLOW_LITE_EXPERIMENTAL_RUY_RUY_SIDE_PAIR_H_ |
| |
| #include "ruy/check_macros.h" |
| |
| namespace ruy { |
| |
| // Enumeration of the sides, i.e. the operands 'slots', in a matrix |
| // multiplication. The numerical values of these enumeration constants matter |
| // because these will be used as indices into the array underlying a SidePair. |
| enum class Side { |
| // Left-hand side |
| kLhs = 0, |
| // Right-hand side |
| kRhs = 1 |
| }; |
| |
| // SidePair is a pair container where the two elements are indexed by a Side |
| // enum. |
| template <typename T> |
| class SidePair final { |
| public: |
| SidePair() {} |
| SidePair(const T& a, const T& b) : elem_{a, b} {} |
| const T& operator[](Side side) const { |
| const int index = static_cast<int>(side); |
| // Technically this check is vacuous, since other values would be |
| // out-of-range for enum Side. |
| RUY_DCHECK(index == 0 || index == 1); |
| return elem_[index]; |
| } |
| |
| T& operator[](Side side) { |
| const int index = static_cast<int>(side); |
| // Technically this check is vacuous, since other values would be |
| // out-of-range for enum Side. |
| RUY_DCHECK(index == 0 || index == 1); |
| return elem_[index]; |
| } |
| |
| private: |
| static_assert(static_cast<int>(Side::kLhs) == 0, ""); |
| static_assert(static_cast<int>(Side::kRhs) == 1, ""); |
| T elem_[2]; |
| }; |
| |
| } // namespace ruy |
| |
| #endif // TENSORFLOW_LITE_EXPERIMENTAL_RUY_RUY_SIDE_PAIR_H_ |