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68 lines
2.2 KiB
68 lines
2.2 KiB
/* |
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* Copyright (C) 2017 The Android Open Source Project |
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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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*/ |
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#ifndef LIBTEXTCLASSIFIER_COMMON_SIMPLE_ADDER_H_ |
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#define LIBTEXTCLASSIFIER_COMMON_SIMPLE_ADDER_H_ |
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#include "util/base/integral_types.h" |
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#include "util/base/port.h" |
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namespace libtextclassifier { |
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namespace nlp_core { |
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// Implements add and scaleadd in the most straight-forward way, and it doesn't |
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// have any additional requirement on the alignment and array size. |
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class SimpleAdder { |
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public: |
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TC_ATTRIBUTE_ALWAYS_INLINE SimpleAdder(float *dest, int num_floats) |
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: dest_(dest), num_floats_(num_floats) {} |
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TC_ATTRIBUTE_ALWAYS_INLINE void LazyAdd(const float *source) const { |
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AddImpl(source, num_floats_, dest_); |
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} |
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TC_ATTRIBUTE_ALWAYS_INLINE void LazyScaleAdd(const float *source, |
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const float scale) const { |
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ScaleAddImpl(source, num_floats_, scale, dest_); |
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} |
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// Simple fast while loop to implement dest += source. |
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TC_ATTRIBUTE_ALWAYS_INLINE static void AddImpl(const float *__restrict source, |
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uint32 size, |
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float *__restrict dest) { |
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for (uint32 i = 0; i < size; ++i) { |
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dest[i] += source[i]; |
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} |
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} |
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// Simple fast while loop to implement dest += scale * source. |
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TC_ATTRIBUTE_ALWAYS_INLINE static void ScaleAddImpl( |
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const float *__restrict source, uint32 size, const float scale, |
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float *__restrict dest) { |
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for (uint32 i = 0; i < size; ++i) { |
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dest[i] += source[i] * scale; |
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} |
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} |
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private: |
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float *dest_; |
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int num_floats_; |
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}; |
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} // namespace nlp_core |
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} // namespace libtextclassifier |
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#endif // LIBTEXTCLASSIFIER_COMMON_SIMPLE_ADDER_H_
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