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60 lines
2.5 KiB
C++
60 lines
2.5 KiB
C++
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/* Copyright (c) 2021, 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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#include <assert.h>
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#include "histogram_common.h"
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extern "C" void histogram64CPU(uint *h_Histogram, void *h_Data,
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uint byteCount) {
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for (uint i = 0; i < HISTOGRAM64_BIN_COUNT; i++) h_Histogram[i] = 0;
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assert(sizeof(uint) == 4 && (byteCount % 4) == 0);
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for (uint i = 0; i < (byteCount / 4); i++) {
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uint data = ((uint *)h_Data)[i];
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h_Histogram[(data >> 2) & 0x3FU]++;
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h_Histogram[(data >> 10) & 0x3FU]++;
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h_Histogram[(data >> 18) & 0x3FU]++;
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h_Histogram[(data >> 26) & 0x3FU]++;
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}
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}
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extern "C" void histogram256CPU(uint *h_Histogram, void *h_Data,
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uint byteCount) {
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for (uint i = 0; i < HISTOGRAM256_BIN_COUNT; i++) h_Histogram[i] = 0;
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assert(sizeof(uint) == 4 && (byteCount % 4) == 0);
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for (uint i = 0; i < (byteCount / 4); i++) {
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uint data = ((uint *)h_Data)[i];
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h_Histogram[(data >> 0) & 0xFFU]++;
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h_Histogram[(data >> 8) & 0xFFU]++;
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h_Histogram[(data >> 16) & 0xFFU]++;
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h_Histogram[(data >> 24) & 0xFFU]++;
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}
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}
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