wehub-resource-sync
71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
/* Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
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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 <ostream>
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#include "paddle/common/exception.h"
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#include "paddle/phi/common/backend.h"
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namespace paddle {
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namespace experimental {
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/**
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* We use the backend to form a bit set to assist the runtime kernel selection,
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* and the higher backend bit has a higher priority.
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*
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* A Tensor may belong to multiple backends at the same time, such CPU and
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* OneDNN. Only one backend value cannot
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*/
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class BackendSet final {
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public:
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constexpr BackendSet() : bitset_(0) {}
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explicit constexpr BackendSet(Backend b)
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: bitset_(b == Backend::UNDEFINED
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? 0
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: 1ULL << (static_cast<uint8_t>(b) - 1)) {}
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inline uint32_t bitset() const { return bitset_; }
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bool inline Has(Backend b) const {
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PD_CHECK(b != Backend::UNDEFINED, "Backend argument can't be UNDEFINED.");
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return static_cast<bool>(bitset_ & BackendSet(b).bitset());
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}
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bool IsEmpty() const { return bitset_ == 0; }
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BackendSet operator|(const BackendSet& other) const {
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return BackendSet(bitset_ | other.bitset());
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}
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BackendSet operator&(const BackendSet& other) const {
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return BackendSet(bitset_ & other.bitset());
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}
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BackendSet operator-(const BackendSet& other) const {
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return BackendSet(bitset_ & ~other.bitset());
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}
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BackendSet operator^(const BackendSet& other) const {
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return BackendSet(bitset_ ^ other.bitset());
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}
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bool operator==(const BackendSet& other) const {
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return bitset_ == other.bitset();
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}
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private:
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constexpr BackendSet(uint32_t bitset) : bitset_(bitset) {}
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uint32_t bitset_;
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};
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} // namespace experimental
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} // namespace paddle
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