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42 lines
1.3 KiB
42 lines
1.3 KiB
9 years ago
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/* Copyright (c) 2016 Baidu, Inc. 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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#ifndef HL_DEVICE_FUNCTIONS_CUH_
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#define HL_DEVICE_FUNCTIONS_CUH_
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namespace hppl {
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static __inline__ __device__ double atomicAdd(double* address, double val) {
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// NOLINTNEXTLINE
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unsigned long long int* address_as_ull = (unsigned long long int*)address;
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unsigned long long int old = *address_as_ull, assumed; // NOLINT
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do {
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assumed = old;
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old = atomicCAS(address_as_ull,
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assumed,
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__double_as_longlong(val +
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__longlong_as_double(assumed)));
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} while (assumed != old);
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return __longlong_as_double(old);
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}
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} // namespace hppl
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using hppl::atomicAdd;
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#endif /* HL_DEVICE_FUNCTIONS_CUH_ */
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