200 lines
6.3 KiB
C
200 lines
6.3 KiB
C
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/*******************************************************************************
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* Copyright (c) 2015-2018 Skymind, Inc.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Apache License, Version 2.0 which is available at
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* https://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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* SPDX-License-Identifier: Apache-2.0
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******************************************************************************/
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//
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// @author raver119@gmail.com
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//
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#ifndef LIBND4J_HEADERS_ACTIVATIONS_H
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#define LIBND4J_HEADERS_ACTIVATIONS_H
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#include <ops/declarable/headers/common.h>
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namespace nd4j {
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namespace ops {
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/**
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* This is Sigmoid activation function implementation
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* Math is: 1 / 1 + exp(-x)
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*/
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#if NOT_EXCLUDED(OP_sigmoid)
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DECLARE_CONFIGURABLE_OP(sigmoid, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(sigmoid_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This is Softsign activation function implementation
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* Math is: x / 1 + abs(x)
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*/
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#if NOT_EXCLUDED(OP_softsign)
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DECLARE_CONFIGURABLE_OP(softsign, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(softsign_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This is Tanh activation function implementation
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*/
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#if NOT_EXCLUDED(OP_tanh)
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DECLARE_CONFIGURABLE_OP(tanh, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(tanh_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This is Softplus activation function implementation
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* Math is: log(1 + exp(x))
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*/
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#if NOT_EXCLUDED(OP_softplus)
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DECLARE_CONFIGURABLE_OP(softplus, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(softplus_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This is RELU activation function implementation
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*/
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#if NOT_EXCLUDED(OP_relu)
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DECLARE_CONFIGURABLE_OP(relu, 1, 1, true, 1, 0);
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DECLARE_CONFIGURABLE_OP(relu_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This is SELU activation function implementation
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*/
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#if NOT_EXCLUDED(OP_selu)
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DECLARE_CONFIGURABLE_OP(selu, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(selu_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This is Leaky RELU activation function.
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* Math is: x < 0 ? alpha * x : x;
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*/
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#if NOT_EXCLUDED(OP_lrelu)
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DECLARE_CONFIGURABLE_OP(lrelu, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(lrelu_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This op is ELU activation function.
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* Math is: x >= 0 ? x : exp(x) - 1;
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*/
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#if NOT_EXCLUDED(OP_elu)
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DECLARE_CONFIGURABLE_OP(elu, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(elu_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This is Cube activation function.
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* Math is: x^3
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*/
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#if NOT_EXCLUDED(OP_cube)
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DECLARE_CONFIGURABLE_OP(cube, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(cube_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This is RectifiedTanh activation function.
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* Math is: max(0, tanh(x))
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*/
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#if NOT_EXCLUDED(OP_rectifiedtanh)
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DECLARE_CONFIGURABLE_OP(rectifiedtanh, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(rectifiedtanh_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This is RationalTanh activation function.
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*/
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#if NOT_EXCLUDED(OP_rationaltanh)
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DECLARE_CONFIGURABLE_OP(rationaltanh, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(rationaltanh_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This is HardTanh activation function.
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* Math is: x < -1.0 ? -1.0 : x > 1.0 ? 1.0 : x;
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*/
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#if NOT_EXCLUDED(OP_hardtanh)
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DECLARE_CONFIGURABLE_OP(hardtanh, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(hardtanh_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This is HardSigmoid activation function.
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* Math is: min(1, max(0, 0.2 * x + 0.5))
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*/
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#if NOT_EXCLUDED(OP_hardsigmoid)
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DECLARE_CONFIGURABLE_OP(hardsigmoid, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(hardsigmoid_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* This is Indentity operation. It passes signal umodified in both directions.
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*/
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#if NOT_EXCLUDED(OP_identity)
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DECLARE_OP(identity, 1, 1, true);
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DECLARE_OP(identity_bp, 2, 1, true);
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#endif
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/**
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* This is Indentity operation. It passes signal umodified in both directions.
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*/
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#if NOT_EXCLUDED(OP_identity_n)
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DECLARE_CUSTOM_OP(identity_n, 1, 1, true, 0, 0);
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#endif
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/**
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* This is Concatenated RELU implementation.
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* What happens inside: RELU(Concat((x, -x, {-1})))
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*
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* PLEASE NOTE: Concatenation will double amount of features available in input
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*/
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#if NOT_EXCLUDED(OP_crelu)
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DECLARE_CUSTOM_OP(crelu, 1, 1, false, 0, 0);
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DECLARE_CUSTOM_OP(crelu_bp, 2, 1, false, 0, 0);
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#endif
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/**
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* This is RELU6 activation function implementation
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*/
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#if NOT_EXCLUDED(OP_relu6)
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DECLARE_CONFIGURABLE_OP(relu6, 1, 1, true, 1, 0);
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DECLARE_CONFIGURABLE_OP(relu6_bp, 2, 1, true, 0, 0);
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#endif
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/**
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* Parametric Rectified Linear Unit
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* f(x) = alpha * x for x < 0, f(x) = x for x >= 0
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*/
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#if NOT_EXCLUDED(OP_prelu)
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DECLARE_CONFIGURABLE_OP(prelu, 2, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(prelu_bp, 3, 2, true, 0, 0);
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#endif
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/**
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* Thresholded Rectified Linear Unit
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* f(x) = x for x > theta, f(x) = 0 otherwise
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* theta must be >= 0
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*/
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#if NOT_EXCLUDED(OP_thresholdedrelu)
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DECLARE_CONFIGURABLE_OP(thresholdedrelu, 1, 1, true, 0, 0);
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DECLARE_CONFIGURABLE_OP(thresholdedrelu_bp, 2, 1, true, 0, 0);
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#endif
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}
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}
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#endif
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