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