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authorMiles Macklin <[email protected]>2017-03-10 14:51:31 +1300
committerMiles Macklin <[email protected]>2017-03-10 14:51:31 +1300
commitad3d90fafe5ee79964bdfe1f1e0704c3ffcdfd5f (patch)
tree4cc6f3288363889d7342f7f8407c0251e6904819 /external/cub-1.3.2/cub/thread/thread_operators.cuh
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Initial 1.1.0 binary release
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+/******************************************************************************
+ * 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)