dangqingqing
7 years ago
parent
2a8dbd130d
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/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 <math.h>
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#include "hl_functions.h"
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namespace hppl {
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namespace typef {
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float relu(const float a) {
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return a > static_cast<float>(0.0) ? a : static_cast<float>(0.0);
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}
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float sigmoid(const float a) {
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const float min = SIGMOID_THRESHOLD_MIN;
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const float max = SIGMOID_THRESHOLD_MAX;
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float tmp = (a < min) ? min : ((a > max) ? max : a);
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return static_cast<float>(1.0) / (static_cast<float>(1.0) + exp(-tmp));
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}
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float tanh(const float a) {
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float tmp = -2.0 * a;
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tmp = (tmp > EXP_MAX_INPUT) ? EXP_MAX_INPUT : tmp;
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return (2.0 / (1.0 + exp(tmp))) - 1.0;
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}
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float linear(const float a) { return a; }
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float relu(const float a, const float b) { return a * (b > 0.0 ? 1.0 : 0.0); }
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float sigmoid(const float a, const float b) {
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return a * b * (static_cast<float>(1) - b);
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}
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float tanh(const float a, const float b) {
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return a * (static_cast<float>(1) - b * b);
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}
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float linear(const float a, const float b) { return a; }
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} // namespace typef
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namespace typed {
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double relu(const double a) {
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return a > static_cast<double>(0.0) ? a : static_cast<double>(0.0);
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}
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double sigmoid(const double a) {
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const double min = SIGMOID_THRESHOLD_MIN;
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const double max = SIGMOID_THRESHOLD_MAX;
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double tmp = (a < min) ? min : ((a > max) ? max : a);
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return static_cast<double>(1.0) / (static_cast<double>(1.0) + exp(-tmp));
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}
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double tanh(const double a) {
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double tmp = -2.0 * a;
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tmp = (tmp > EXP_MAX_INPUT) ? EXP_MAX_INPUT : tmp;
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return (2.0 / (1.0 + exp(tmp))) - 1.0;
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}
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double linear(const double a) { return a; }
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double relu(const double a, const double b) {
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return a * (b > 0.0 ? 1.0 : 0.0);
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}
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double sigmoid(const double a, const double b) {
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return a * b * (static_cast<double>(1) - b);
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}
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double tanh(const double a, const double b) {
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return a * (static_cast<double>(1) - b * b);
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}
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double linear(const double a, const double b) { return a; }
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} // namespace typed
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} // namespace hppl
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