mirror of
https://github.com/NVIDIA/cuda-samples.git
synced 2024-10-07 02:29:16 +08:00
60 lines
2.5 KiB
C++
60 lines
2.5 KiB
C++
/* 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.
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include "histogram_common.h"
|
|
|
|
extern "C" void histogram64CPU(uint *h_Histogram, void *h_Data,
|
|
uint byteCount) {
|
|
for (uint i = 0; i < HISTOGRAM64_BIN_COUNT; i++) h_Histogram[i] = 0;
|
|
|
|
assert(sizeof(uint) == 4 && (byteCount % 4) == 0);
|
|
|
|
for (uint i = 0; i < (byteCount / 4); i++) {
|
|
uint data = ((uint *)h_Data)[i];
|
|
h_Histogram[(data >> 2) & 0x3FU]++;
|
|
h_Histogram[(data >> 10) & 0x3FU]++;
|
|
h_Histogram[(data >> 18) & 0x3FU]++;
|
|
h_Histogram[(data >> 26) & 0x3FU]++;
|
|
}
|
|
}
|
|
|
|
extern "C" void histogram256CPU(uint *h_Histogram, void *h_Data,
|
|
uint byteCount) {
|
|
for (uint i = 0; i < HISTOGRAM256_BIN_COUNT; i++) h_Histogram[i] = 0;
|
|
|
|
assert(sizeof(uint) == 4 && (byteCount % 4) == 0);
|
|
|
|
for (uint i = 0; i < (byteCount / 4); i++) {
|
|
uint data = ((uint *)h_Data)[i];
|
|
h_Histogram[(data >> 0) & 0xFFU]++;
|
|
h_Histogram[(data >> 8) & 0xFFU]++;
|
|
h_Histogram[(data >> 16) & 0xFFU]++;
|
|
h_Histogram[(data >> 24) & 0xFFU]++;
|
|
}
|
|
}
|