mirror of
https://github.com/NVIDIA/cuda-samples.git
synced 2024-11-25 01:19:19 +08:00
81 lines
2.9 KiB
Plaintext
81 lines
2.9 KiB
Plaintext
/* Copyright (c) 2022, 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 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 ``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 THE COPYRIGHT OWNER OR
|
|
* CONTRIBUTORS 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.
|
|
*/
|
|
|
|
/* Simple kernel demonstrating atomic functions in device code. */
|
|
|
|
#ifndef _SIMPLEATOMICS_KERNEL_H_
|
|
#define _SIMPLEATOMICS_KERNEL_H_
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//! Simple test kernel for atomic instructions
|
|
//! @param g_idata input data in global memory
|
|
//! @param g_odata output data in global memory
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
extern "C" __global__ void testKernel(int *g_odata) {
|
|
// access thread id
|
|
const unsigned int tid = blockDim.x * blockIdx.x + threadIdx.x;
|
|
|
|
// Test various atomic instructions
|
|
// Arithmetic atomic instructions
|
|
// Atomic addition
|
|
atomicAdd(&g_odata[0], 10);
|
|
|
|
// Atomic subtraction (final should be 0)
|
|
atomicSub(&g_odata[1], 10);
|
|
|
|
// Atomic exchange
|
|
atomicExch(&g_odata[2], tid);
|
|
|
|
// Atomic maximum
|
|
atomicMax(&g_odata[3], tid);
|
|
|
|
// Atomic minimum
|
|
atomicMin(&g_odata[4], tid);
|
|
|
|
// Atomic increment (modulo 17+1)
|
|
atomicInc((unsigned int *)&g_odata[5], 17);
|
|
|
|
// Atomic decrement
|
|
atomicDec((unsigned int *)&g_odata[6], 137);
|
|
|
|
// Atomic compare-and-swap
|
|
atomicCAS(&g_odata[7], tid - 1, tid);
|
|
|
|
// Bitwise atomic instructions
|
|
// Atomic AND
|
|
atomicAnd(&g_odata[8], 2 * tid + 7);
|
|
|
|
// Atomic OR
|
|
atomicOr(&g_odata[9], 1 << tid);
|
|
|
|
// Atomic XOR
|
|
atomicXor(&g_odata[10], tid);
|
|
}
|
|
|
|
#endif // #ifndef _SIMPLEATOMICS_KERNEL_H_
|