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| author | Miles Macklin <[email protected]> | 2017-03-10 14:51:31 +1300 |
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| committer | Miles Macklin <[email protected]> | 2017-03-10 14:51:31 +1300 |
| commit | ad3d90fafe5ee79964bdfe1f1e0704c3ffcdfd5f (patch) | |
| tree | 4cc6f3288363889d7342f7f8407c0251e6904819 /external/cub-1.3.2/cub/thread/thread_operators.cuh | |
| download | flex-ad3d90fafe5ee79964bdfe1f1e0704c3ffcdfd5f.tar.xz flex-ad3d90fafe5ee79964bdfe1f1e0704c3ffcdfd5f.zip | |
Initial 1.1.0 binary release
Diffstat (limited to 'external/cub-1.3.2/cub/thread/thread_operators.cuh')
| -rw-r--r-- | external/cub-1.3.2/cub/thread/thread_operators.cuh | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/external/cub-1.3.2/cub/thread/thread_operators.cuh b/external/cub-1.3.2/cub/thread/thread_operators.cuh new file mode 100644 index 0000000..75c9627 --- /dev/null +++ b/external/cub-1.3.2/cub/thread/thread_operators.cuh @@ -0,0 +1,206 @@ +/****************************************************************************** + * Copyright (c) 2011, Duane Merrill. All rights reserved. + * Copyright (c) 2011-2014, NVIDIA CORPORATION. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of the NVIDIA CORPORATION nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + ******************************************************************************/ + +/** + * \file + * Simple binary operator functor types + */ + +/****************************************************************************** + * Simple functor operators + ******************************************************************************/ + +#pragma once + +#include "../util_macro.cuh" +#include "../util_type.cuh" +#include "../util_namespace.cuh" + +/// Optional outer namespace(s) +CUB_NS_PREFIX + +/// CUB namespace +namespace cub { + + +/** + * \addtogroup UtilModule + * @{ + */ + +/** + * \brief Default equality functor + */ +struct Equality +{ + /// Boolean equality operator, returns <tt>(a == b)</tt> + template <typename T> + __host__ __device__ __forceinline__ bool operator()(const T &a, const T &b) const + { + return a == b; + } +}; + + +/** + * \brief Default inequality functor + */ +struct Inequality +{ + /// Boolean inequality operator, returns <tt>(a != b)</tt> + template <typename T> + __host__ __device__ __forceinline__ bool operator()(const T &a, const T &b) const + { + return a != b; + } +}; + + +/** + * \brief Inequality functor (wraps equality functor) + */ +template <typename EqualityOp> +struct InequalityWrapper +{ + /// Wrapped equality operator + EqualityOp op; + + /// Constructor + __host__ __device__ __forceinline__ + InequalityWrapper(EqualityOp op) : op(op) {} + + /// Boolean inequality operator, returns <tt>(a != b)</tt> + template <typename T> + __host__ __device__ __forceinline__ bool operator()(const T &a, const T &b) const + { + return !op(a, b); + } +}; + + +/** + * \brief Default sum functor + */ +struct Sum +{ + /// Boolean sum operator, returns <tt>a + b</tt> + template <typename T> + __host__ __device__ __forceinline__ T operator()(const T &a, const T &b) const + { + return a + b; + } +}; + + +/** + * \brief Default max functor + */ +struct Max +{ + /// Boolean max operator, returns <tt>(a > b) ? a : b</tt> + template <typename T> + __host__ __device__ __forceinline__ T operator()(const T &a, const T &b) const + { + return CUB_MAX(a, b); + } +}; + + +/** + * \brief Arg max functor (keeps the value and offset of the first occurrence of the l item) + */ +struct ArgMax +{ + /// Boolean max operator, preferring the item having the smaller offset in case of ties + template <typename T, typename Offset> + __host__ __device__ __forceinline__ ItemOffsetPair<T, Offset> operator()( + const ItemOffsetPair<T, Offset> &a, + const ItemOffsetPair<T, Offset> &b) const + { + if (a.value == b.value) + return (b.offset < a.offset) ? b : a; + + return (b.value > a.value) ? b : a; + } +}; + + +/** + * \brief Default min functor + */ +struct Min +{ + /// Boolean min operator, returns <tt>(a < b) ? a : b</tt> + template <typename T> + __host__ __device__ __forceinline__ T operator()(const T &a, const T &b) const + { + return CUB_MIN(a, b); + } +}; + + +/** + * \brief Arg min functor (keeps the value and offset of the first occurrence of the smallest item) + */ +struct ArgMin +{ + /// Boolean min operator, preferring the item having the smaller offset in case of ties + template <typename T, typename Offset> + __host__ __device__ __forceinline__ ItemOffsetPair<T, Offset> operator()( + const ItemOffsetPair<T, Offset> &a, + const ItemOffsetPair<T, Offset> &b) const + { + if (a.value == b.value) + return (b.offset < a.offset) ? b : a; + + return (b.value < a.value) ? b : a; + } +}; + + +/** + * \brief Default cast functor + */ +template <typename B> +struct Cast +{ + /// Boolean max operator, returns <tt>(a > b) ? a : b</tt> + template <typename A> + __host__ __device__ __forceinline__ B operator()(const A &a) const + { + return (B) a; + } +}; + + + +/** @} */ // end group UtilModule + + +} // CUB namespace +CUB_NS_POSTFIX // Optional outer namespace(s) |