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139 lines
3.3 KiB
139 lines
3.3 KiB
/* 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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#pragma once
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#include <initializer_list>
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#include <stdexcept>
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#include <vector>
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#include "paddle/framework/dim.h"
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#include "paddle/platform/enforce.h"
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#include "paddle/platform/variant.h"
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namespace paddle {
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namespace framework {
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/**
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* \brief A dynamically sized dimension.
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*
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* The number of dimensions must be between [1, 9].
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*/
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struct DDim {
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typedef boost::variant<Dim<1>, Dim<2>, Dim<3>, Dim<4>, Dim<5>, Dim<6>, Dim<7>,
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Dim<8>, Dim<9>>
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DDimVar;
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DDimVar var;
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DDim() : var(Dim<1>()) {}
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template <int D>
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explicit DDim(const Dim<D>& in) : var(in) {}
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/*implicit*/ DDim(std::initializer_list<int64_t> init_list);
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template <int D>
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DDim& operator=(const Dim<D>& in) {
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var = in;
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return *this;
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}
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int64_t& operator[](int idx);
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int64_t operator[](int idx) const;
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template <typename Visitor>
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typename Visitor::result_type apply_visitor(Visitor& visitor) {
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return var.apply_visitor(visitor);
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}
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template <typename Visitor>
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typename Visitor::result_type apply_visitor(Visitor& visitor) const {
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return var.apply_visitor(visitor);
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}
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DDimVar getVar() { return var; }
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bool operator==(DDim d) const;
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bool operator!=(DDim d) const;
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DDim operator+(DDim d) const;
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DDim operator*(DDim d) const;
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int size() const;
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};
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/**
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* \brief Make a DDim from std::vector<int64_t>
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*
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* \param dims An vector of ints. Must be sized between [1, 9]
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*/
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DDim make_ddim(const std::vector<int64_t>& dims);
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DDim make_ddim(const std::vector<int>& dims);
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/**
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* \brief Make a DDim from an initializer list
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*
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* \param dims An initializer list of ints. Must be sized between [1, 9]
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*
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*/
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DDim make_ddim(std::initializer_list<int64_t> dims);
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int64_t get(const DDim& dim, int idx);
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void set(DDim& dim, int idx, int val);
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std::vector<int64_t> vectorize(const DDim& ddim);
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std::vector<int> vectorize2int(const DDim& ddim);
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int64_t product(const DDim& ddim);
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/**
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* \brief Slice a ddim
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*
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* Slice dim with [begin, end).
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* e.g. DDim d = make_ddim({1,2,3,4,5});
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* slice_ddim(d, 1, 3); ====> {2,3}
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*/
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DDim slice_ddim(const DDim& dim, int begin, int end);
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/**
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* \brief What is the length of this dimension?
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*
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* \param Dynamic dimension to inspect
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*/
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int arity(const DDim& ddim);
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std::ostream& operator<<(std::ostream&, const DDim&);
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// Reshape a tensor to a matrix. The matrix's first dimension(column length)
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// will be the product of tensor's first `num_col_dims` dimensions.
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DDim flatten_to_2d(const DDim& src, int num_col_dims);
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DDim flatten_to_1d(const DDim& src);
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DDim stride(const DDim& ddim);
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} // namespace framework
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} // namespace paddle
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namespace boost {
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template <typename T>
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T get(const paddle::framework::DDim& in) {
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return boost::get<T>(in.var);
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}
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} // namespace boost
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