wehub-resource-sync
52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
// Copyright (c) 2024 PaddlePaddle Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "paddle/phi/kernels/funcs/math/cos_sim_functor.h"
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namespace phi {
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namespace math {
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template <typename T>
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struct CosSimDyFunctor<CPUContext, T> {
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void operator()(const CPUContext& dev_ctx,
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const T* x_norm,
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const T* y_norm,
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const T* x,
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const T* y,
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const T* z,
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const T* dz,
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const size_t rows,
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const size_t cols,
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T* dy) const {
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for (size_t row_id = 0; row_id < rows; ++row_id) {
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auto xy_norm_prod = x_norm[row_id] * y_norm[0];
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auto dz_data = dz[row_id];
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auto z_data = z[row_id];
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auto* x_data = x + cols * row_id;
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auto reciprocal_xy_norm_prod = 1 / xy_norm_prod;
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auto y_norm_square = y_norm[0] * y_norm[0];
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auto reciprocal_y_norm_square = 1 / y_norm_square;
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for (size_t i = 0; i < cols; ++i) {
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dy[i] += dz_data * (x_data[i] * reciprocal_xy_norm_prod -
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z_data * y[i] * reciprocal_y_norm_square);
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}
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}
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}
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};
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template struct CosSimDyFunctor<CPUContext, float>;
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template struct CosSimDyFunctor<CPUContext, double>;
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} // namespace math
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} // namespace phi
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