mirror of
https://github.com/NVIDIA/cuda-samples.git
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134 lines
4.4 KiB
C++
134 lines
4.4 KiB
C++
/* Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of NVIDIA CORPORATION nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* Utility functions */
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#ifndef _UTIL_H_
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#define _UTIL_H_
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////////////////////////////////////////////////////////////////////////////////
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//! Safely free() for pointer
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////////////////////////////////////////////////////////////////////////////////
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template <class T>
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inline void freePtr(T *&ptr) {
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if (NULL != ptr) {
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free(ptr);
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ptr = NULL;
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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//! Minimum
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////////////////////////////////////////////////////////////////////////////////
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template <class T>
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#ifdef __CUDACC__
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__host__
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__device__
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#endif
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T
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min(const T &lhs, const T &rhs) {
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return (lhs < rhs) ? lhs : rhs;
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}
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////////////////////////////////////////////////////////////////////////////////
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//! Maximum
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////////////////////////////////////////////////////////////////////////////////
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template <class T>
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#ifdef __CUDACC__
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__host__
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__device__
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#endif
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T
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max(const T &lhs, const T &rhs) {
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return (lhs < rhs) ? rhs : lhs;
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}
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////////////////////////////////////////////////////////////////////////////////
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//! Sign of number (integer data type)
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////////////////////////////////////////////////////////////////////////////////
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template <class T>
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#ifdef __CUDACC__
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__host__
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__device__
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#endif
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T
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sign_i(const T &val) {
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return (val < 0) ? -1 : 1;
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}
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////////////////////////////////////////////////////////////////////////////////
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//! Sign of number (float)
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////////////////////////////////////////////////////////////////////////////////
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#ifdef __CUDACC__
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__host__ __device__
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#endif
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inline float
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sign_f(const float &val) {
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return (val < 0.0f) ? -1.0f : 1.0f;
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}
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////////////////////////////////////////////////////////////////////////////////
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//! Sign of number (double)
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////////////////////////////////////////////////////////////////////////////////
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#ifdef __CUDACC__
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__host__ __device__
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#endif
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inline double
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sign_d(const double &val) {
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return (val < 0.0) ? -1.0 : 1.0;
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}
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////////////////////////////////////////////////////////////////////////////////
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//! Swap \a lhs and \a rhs
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////////////////////////////////////////////////////////////////////////////////
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template <class T>
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#ifdef __CUDACC__
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__host__ __device__
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#endif
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void
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swap(T &lhs, T &rhs) {
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T temp = rhs;
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rhs = lhs;
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lhs = temp;
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}
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///////////////////////////////////////////////////////////////////////////////
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//! Get the number of blocks that are required to process \a num_threads with
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//! \a num_threads_blocks threads per block
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///////////////////////////////////////////////////////////////////////////////
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extern "C" inline unsigned int getNumBlocksLinear(
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const unsigned int num_threads, const unsigned int num_threads_block) {
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const unsigned int block_rem =
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((num_threads % num_threads_block) != 0) ? 1 : 0;
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return (num_threads / num_threads_block) + block_rem;
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}
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#endif // #ifndef _UTIL_H_
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