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/* 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]++;
}
}
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