82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
/*******************************************************************************
|
|
* Copyright (c) 2015-2018 Skymind, Inc.
|
|
*
|
|
* This program and the accompanying materials are made available under the
|
|
* terms of the Apache License, Version 2.0 which is available at
|
|
* https://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.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
******************************************************************************/
|
|
|
|
//
|
|
// @author Yurii Shyrma (iuriish@yahoo.com), created on 01.02.2018
|
|
//
|
|
|
|
#include <op_boilerplate.h>
|
|
#if NOT_EXCLUDED(OP_log_softmax)
|
|
|
|
#include <ops/declarable/CustomOperations.h>
|
|
#include <ops/declarable/helpers/activations.h>
|
|
|
|
namespace nd4j {
|
|
namespace ops {
|
|
|
|
|
|
DECLARE_TYPES(log_softmax) {
|
|
getOpDescriptor()
|
|
->setAllowedInputTypes({ALL_FLOATS})
|
|
->setSameMode(true);
|
|
}
|
|
|
|
CONFIGURABLE_OP_IMPL(log_softmax, 1, 1, true, 0, 0) {
|
|
auto input = INPUT_VARIABLE(0);
|
|
auto output = OUTPUT_VARIABLE(0);
|
|
|
|
const int rank = input->rankOf();
|
|
const int dim = block.getIArguments()->size() > 0 ? INT_ARG(0) : rank - 1;
|
|
|
|
REQUIRE_TRUE(dim < rank, 0, "LOG_SOFTMAX OP: the value of input integer parameter (dimension) must be less than input array rank %i, but got dimension = %i instead !", rank, dim);
|
|
|
|
helpers::logSoftmax(block.launchContext(), *input, *output, dim);
|
|
|
|
return Status::OK();
|
|
}
|
|
|
|
DECLARE_TYPES(log_softmax_bp) {
|
|
getOpDescriptor()
|
|
->setAllowedInputTypes(0, DataType::ANY)
|
|
->setAllowedInputTypes(1, {ALL_FLOATS})
|
|
->setAllowedOutputTypes({ALL_FLOATS});
|
|
}
|
|
|
|
|
|
CONFIGURABLE_OP_IMPL(log_softmax_bp, 2, 1, true, 0, 0) {
|
|
auto input = INPUT_VARIABLE(0);
|
|
auto gradO = INPUT_VARIABLE(1);
|
|
auto gradI = OUTPUT_VARIABLE(0);
|
|
|
|
const int rank = input->rankOf();
|
|
const int dim = block.getIArguments()->size() > 0 ? INT_ARG(0) : rank - 1;
|
|
|
|
REQUIRE_TRUE(dim < rank, 0, "LOG_SOFTMAX_BP OP: the value of input integer parameter (dimension) must be less than input array rank %i, but got dimension = %i instead !", rank, dim);
|
|
|
|
helpers::softmax(block.launchContext(), *input, *gradI, dim);
|
|
|
|
gradI->assign( *gradO - (*gradI * *gradO).reduceAlongDims(reduce::Sum, {dim}, true) );
|
|
|
|
return Status::OK();
|
|
}
|
|
|
|
|
|
|
|
}
|
|
}
|
|
|
|
#endif
|