提交 d59295f2 编写于 作者: H hedaoyuan 提交者: GitHub

Merge pull request #4150 from hedaoyuan/mobile

Add a `neon::relu` activation function.
......@@ -461,7 +461,7 @@ class add<float32x4_t> {
public:
INLINE float32x4_t operator()(const float32x4_t a,
const float32x4_t b) const {
return vmulq_f32(a, b);
return vaddq_f32(a, b);
}
};
......
......@@ -17,6 +17,7 @@ limitations under the License. */
#include <cmath>
#include "BaseMatrix.h"
#include "MathFunctions.h"
#include "NEONFunctions.h"
#include "SIMDFunctions.h"
#include "hl_matrix_apply.cuh"
#include "hl_matrix_base.cuh"
......@@ -666,6 +667,13 @@ void BaseMatrixT<T>::relu(BaseMatrixT& b) {
applyBinary(binary::Relu<T>(), b);
}
#if defined(__ARM_NEON__) || defined(__ARM_NEON)
template <>
void BaseMatrixT<float>::relu(BaseMatrixT& b) {
neon::relu(data_, b.data_, height_ * width_);
}
#endif
DEFINE_MATRIX_BINARY_OP(ReluDerivative, a *= (b > 0.0f ? 1.0f : 0.0f));
template <class T>
void BaseMatrixT<T>::reluDerivative(BaseMatrixT& b) {
......
/* Copyright (c) 2016 PaddlePaddle Authors. 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. */
#if defined(__ARM_NEON__) || defined(__ARM_NEON)
#include "NEONFunctions.h"
#include <arm_neon.h>
namespace paddle {
namespace neon {
// b[i] = a[i] > 0.0f ? a[i] : 0.0f
void relu(const float* a, float* b, int len) {
int offset = len % 16;
float32x4_t ma0, ma1, ma2, ma3;
float32x4_t mb0, mb1, mb2, mb3;
float32x4_t zero = vdupq_n_f32(0.f);
for (int k = 0; k < len / 16; k++, a += 16, b += 16) {
ma0 = vld1q_f32(a);
ma1 = vld1q_f32(a + 4);
ma2 = vld1q_f32(a + 8);
ma3 = vld1q_f32(a + 12);
mb0 = vmaxq_f32(ma0, zero);
mb1 = vmaxq_f32(ma1, zero);
mb2 = vmaxq_f32(ma2, zero);
mb3 = vmaxq_f32(ma3, zero);
vst1q_f32(b, mb0);
vst1q_f32(b + 4, mb1);
vst1q_f32(b + 8, mb2);
vst1q_f32(b + 12, mb3);
}
for (int i = 0; i < offset; i++) {
b[i] = a[i] > 0.0f ? a[i] : 0.0f;
}
}
} // namespace neon
} // namespace paddle
#endif
/* Copyright (c) 2016 PaddlePaddle Authors. 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. */
#pragma once
namespace paddle {
namespace neon {
void relu(const float* a, float* b, int len);
} // namespace neon
} // namespace paddle
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