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swapaxis.cc
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swapaxis.cc
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
/*!
* \file swapaxis.cc
* \brief
* \author Ming Zhang
*/
#include "./swapaxis-inl.h"
#include "operator/elemwise_op_common.h"
#include "operator/operator_common.h"
#include "operator/tensor/elemwise_unary_op.h"
namespace mxnet {
namespace op {
DMLC_REGISTER_PARAMETER(SwapAxisParam);
NNVM_REGISTER_OP(SwapAxis)
.add_alias("swapaxes")
.add_alias("_npi_swapaxes")
.set_num_inputs(1)
.set_num_outputs(1)
.set_attr_parser(ParamParser<SwapAxisParam>)
.describe(R"code(Interchanges two axes of an array.
Examples::
x = [[1, 2, 3]])
swapaxes(x, 0, 1) = [[ 1],
[ 2],
[ 3]]
x = [[[ 0, 1],
[ 2, 3]],
[[ 4, 5],
[ 6, 7]]] // (2,2,2) array
swapaxes(x, 0, 2) = [[[ 0, 4],
[ 2, 6]],
[[ 1, 5],
[ 3, 7]]]
)code" ADD_FILELINE)
.set_attr<FCompute>("FCompute<cpu>", SwapAxisCompute<cpu>)
.set_attr<nnvm::FInferType>("FInferType", ElemwiseType<1, 1>)
.set_attr<mxnet::FInferShape>("FInferShape", SwapAxisShape)
.set_attr<nnvm::FGradient>("FGradient", ElemwiseGradUseNone{"_backward_SwapAxis"})
.add_argument("data", "NDArray-or-Symbol", "Input array.")
.add_arguments(SwapAxisParam::__FIELDS__());
NNVM_REGISTER_OP(_backward_SwapAxis)
.set_num_inputs(1)
.set_num_outputs(1)
.set_attr_parser(ParamParser<SwapAxisParam>)
.set_attr<nnvm::TIsBackward>("TIsBackward", true)
.set_attr<nnvm::FInplaceOption>("FInplaceOption",
[](const NodeAttrs& attrs) {
return std::vector<std::pair<int, int>>{{0, 0}};
})
.set_attr<FCompute>("FCompute<cpu>", SwapAxisGrad<cpu>)
.set_attr<nnvm::FInplaceIdentity>("FInplaceIdentity", [](const NodeAttrs& attrs) {
return std::vector<bool>{true};
});
} // namespace op
} // namespace mxnet