/* Copyright (c) 2016 Baidu, Inc. All Rights Reserve. 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 HL_LSTM_OPS_CUH_ #define HL_LSTM_OPS_CUH_ #ifdef __CUDA_ARCH__ #define INLINE __device__ inline #else #define INLINE inline #endif namespace hppl { namespace forward { class lstm { public: /** * @param valueIn input * @param valueIg input gate * @param valueFg forget gate * @param valueOg output gate * @param prevState previous state * @param state current state * @param stateAtv state active * @param output output * @param checkI check input gate * @param checkF check forget gate * @param checkO check output gate * @param actInput forward function of input * @param actGate forward function of gate * @param actState forward function of state */ INLINE void operator()(real &valueIn, real &valueIg, real &valueFg, real &valueOg, real &prevState, real &state, real &stateAtv, real &output, real &checkI, real &checkF, real &checkO, Active::forward actInput, Active::forward actGate, Active::forward actState) { valueIn = actInput(valueIn); valueIg = actGate(valueIg + prevState * checkI); valueFg = actGate(valueFg + prevState * checkF); state = valueIn * valueIg + prevState * valueFg; valueOg = actGate(valueOg + state * checkO); stateAtv = actState(state); output = valueOg * stateAtv; } #ifndef __NVCC__ #ifndef __AVX__ static const bool avx = false; #else static const bool avx = true; INLINE void operator()(__m256 &valueIn, __m256 &valueIg, __m256 &valueFg, __m256 &valueOg, __m256 &prevState, __m256 &state, __m256 &stateAtv, __m256 &output, __m256 &checkI, __m256 &checkF, __m256 &checkO, Active<__m256>::forward actInput, Active<__m256>::forward actGate, Active<__m256>::forward actState) { valueIn = actInput(valueIn); valueIg = actGate( _mm256_add_ps(valueIg, _mm256_mul_ps(prevState, checkI))); valueFg = actGate( _mm256_add_ps(valueFg, _mm256_mul_ps(prevState, checkF))); state = _mm256_add_ps(_mm256_mul_ps(valueIn, valueIg) , _mm256_mul_ps(prevState, valueFg)); valueOg = actGate(_mm256_add_ps(valueOg, _mm256_mul_ps(state, checkO))); stateAtv = actState(state); output = _mm256_mul_ps(valueOg, stateAtv); } #endif #endif }; } // namespace forward namespace backward { class lstm { public: /** * @param valueIn input * @param valueIg input gate * @param valueFg forget gate * @param valueOg output gate * @param gradIn input grad * @param gradIg input gate grad * @param gradFg forget gate grad * @param gradOg output gate grad * @param prevState previous state value * @param prevStateGrad previous state grad * @param state current state value * @param stateGrad current state grad * @param stateAtv state active * @param outputGrad output grad * @param checkI check input gate * @param checkF check forget gate * @param checkO check output gate * @param checkIGrad check input gate grad * @param checkFGrad check forget gate grad * @param checkOGrad check output gate grad * @param actInput backward function of input * @param actGate backward function of gate * @param actState backward function of state */ INLINE void operator()(real &valueIn, real &valueIg, real &valueFg, real &valueOg, real &gradIn, real &gradIg, real &gradFg, real &gradOg, real &prevState, real &prevStateGrad, real &state, real &stateGrad, real &stateAtv, real &outputGrad, real &checkI, real &checkF, real &checkO, real &checkIGrad, real &checkFGrad, real &checkOGrad, Active::backward actInput, Active::backward actGate, Active::backward actState) { gradOg = actGate(outputGrad * stateAtv, valueOg); stateGrad += actState(outputGrad * valueOg, stateAtv) + gradOg * checkO; gradIn = actInput(stateGrad * valueIg, valueIn); gradIg = actGate(stateGrad * valueIn, valueIg); gradFg = actGate(stateGrad * prevState, valueFg); prevStateGrad = gradIg * checkI + gradFg * checkF + stateGrad * valueFg; checkIGrad = gradIg * prevState; checkFGrad = gradFg * prevState; checkOGrad = gradOg * state; } #ifndef __NVCC__ #ifndef __AVX__ static const bool avx = false; #else static const bool avx = true; INLINE void operator()(__m256 &valueIn, __m256 &valueIg, __m256 &valueFg, __m256 &valueOg, __m256 &gradIn, __m256 &gradIg, __m256 &gradFg, __m256 &gradOg, __m256 &prevState, __m256 &prevStateGrad, __m256 &state, __m256 &stateGrad, __m256 &stateAtv, __m256 &outputGrad, __m256 &checkI, __m256 &checkF, __m256 &checkO, __m256 &checkIGrad, __m256 &checkFGrad, __m256 &checkOGrad, Active<__m256>::backward actInput, Active<__m256>::backward actGate, Active<__m256>::backward actState) { gradOg = actGate(_mm256_mul_ps(outputGrad, stateAtv), valueOg); stateGrad = _mm256_add_ps( actState(_mm256_mul_ps(outputGrad, valueOg), stateAtv), stateGrad); stateGrad = _mm256_add_ps(_mm256_mul_ps(gradOg, checkO), stateGrad); gradIn = actInput(_mm256_mul_ps(stateGrad, valueIg), valueIn); gradIg = actGate(_mm256_mul_ps(stateGrad, valueIn), valueIg); gradFg = actGate(_mm256_mul_ps(stateGrad, prevState), valueFg); prevStateGrad = _mm256_add_ps( _mm256_mul_ps(gradIg, checkI), _mm256_mul_ps(gradFg, checkF)); prevStateGrad = _mm256_add_ps( _mm256_mul_ps(stateGrad, valueFg), prevStateGrad); checkIGrad = _mm256_mul_ps(gradIg, prevState); checkFGrad = _mm256_mul_ps(gradFg, prevState); checkOGrad = _mm256_mul_ps(gradOg, state); } #endif #endif }; } // namespace backward } // namespace hppl #endif /* HL_LSTM_OPS_CUH_ */