wehub-resource-sync
45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
/* Copyright (c) 2022 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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namespace phi {
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namespace funcs {
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namespace sparse {
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// brief: calculation the distance between start and end
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template <typename T>
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__global__ void DistanceKernel(const T* start, const T* end, T* distance) {
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if (threadIdx.x == 0) {
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*distance = end - start;
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}
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}
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inline __device__ bool SetBits(const int value, int* ptr) {
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const int index = value >> 5;
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const int mask = 1 << (value & 31);
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const int old = atomicOr(ptr + index, mask);
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return (mask & old) != 0;
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}
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inline __device__ bool TestBits(const int value, const int* ptr) {
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const int index = value >> 5;
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const int mask = 1 << (value & 31);
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return (mask & ptr[index]) != 0;
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}
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} // namespace sparse
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} // namespace funcs
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} // namespace phi
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