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97 lines
3.5 KiB
Plaintext
97 lines
3.5 KiB
Plaintext
/*===---- complex - CUDA wrapper for <algorithm> ----------------------------===
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*===-----------------------------------------------------------------------===
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*/
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#ifndef __CLANG_CUDA_WRAPPERS_ALGORITHM
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#define __CLANG_CUDA_WRAPPERS_ALGORITHM
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// This header defines __device__ overloads of std::min/max, but only if we're
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// <= C++11. In C++14, these functions are constexpr, and so are implicitly
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// __host__ __device__.
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//
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// We don't support the initializer_list overloads because
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// initializer_list::begin() and end() are not __host__ __device__ functions.
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//
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// When compiling in C++14 mode, we could force std::min/max to have different
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// implementations for host and device, by declaring the device overloads
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// before the constexpr overloads appear. We choose not to do this because
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// a) why write our own implementation when we can use one from the standard
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// library? and
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// b) libstdc++ is evil and declares min/max inside a header that is included
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// *before* we include <algorithm>. So we'd have to unconditionally
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// declare our __device__ overloads of min/max, but that would pollute
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// things for people who choose not to include <algorithm>.
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#include_next <algorithm>
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#if __cplusplus <= 201103L
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// We need to define these overloads in exactly the namespace our standard
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// library uses (including the right inline namespace), otherwise they won't be
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// picked up by other functions in the standard library (e.g. functions in
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// <complex>). Thus the ugliness below.
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#ifdef _LIBCPP_BEGIN_NAMESPACE_STD
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_LIBCPP_BEGIN_NAMESPACE_STD
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#else
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namespace std {
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#ifdef _GLIBCXX_BEGIN_NAMESPACE_VERSION
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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#endif
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#endif
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template <class __T, class __Cmp>
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inline __device__ const __T &
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max(const __T &__a, const __T &__b, __Cmp __cmp) {
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return __cmp(__a, __b) ? __b : __a;
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}
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template <class __T>
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inline __device__ const __T &
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max(const __T &__a, const __T &__b) {
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return __a < __b ? __b : __a;
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}
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template <class __T, class __Cmp>
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inline __device__ const __T &
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min(const __T &__a, const __T &__b, __Cmp __cmp) {
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return __cmp(__b, __a) ? __b : __a;
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}
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template <class __T>
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inline __device__ const __T &
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min(const __T &__a, const __T &__b) {
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return __a < __b ? __b : __a;
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}
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#ifdef _LIBCPP_END_NAMESPACE_STD
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_LIBCPP_END_NAMESPACE_STD
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#else
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#ifdef _GLIBCXX_BEGIN_NAMESPACE_VERSION
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_GLIBCXX_END_NAMESPACE_VERSION
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#endif
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} // namespace std
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#endif
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#endif // __cplusplus <= 201103L
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#endif // __CLANG_CUDA_WRAPPERS_ALGORITHM
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