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86 lines
3.6 KiB
C
86 lines
3.6 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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#ifndef HISTOGRAM_COMMON_H
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#define HISTOGRAM_COMMON_H
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////////////////////////////////////////////////////////////////////////////////
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// Common definitions
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////////////////////////////////////////////////////////////////////////////////
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#define HISTOGRAM64_BIN_COUNT 64
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#define HISTOGRAM256_BIN_COUNT 256
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#define UINT_BITS 32
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typedef unsigned int uint;
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typedef unsigned char uchar;
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////////////////////////////////////////////////////////////////////////////////
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// GPU-specific common definitions
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////////////////////////////////////////////////////////////////////////////////
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#define LOG2_WARP_SIZE 5U
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#define WARP_SIZE (1U << LOG2_WARP_SIZE)
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// May change on future hardware, so better parametrize the code
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#define SHARED_MEMORY_BANKS 16
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// Threadblock size: must be a multiple of (4 * SHARED_MEMORY_BANKS)
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// because of the bit permutation of threadIdx.x
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#define HISTOGRAM64_THREADBLOCK_SIZE (4 * SHARED_MEMORY_BANKS)
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// Warps ==subhistograms per threadblock
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#define WARP_COUNT 6
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// Threadblock size
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#define HISTOGRAM256_THREADBLOCK_SIZE (WARP_COUNT * WARP_SIZE)
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// Shared memory per threadblock
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#define HISTOGRAM256_THREADBLOCK_MEMORY (WARP_COUNT * HISTOGRAM256_BIN_COUNT)
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#define UMUL(a, b) ((a) * (b))
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#define UMAD(a, b, c) (UMUL((a), (b)) + (c))
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////////////////////////////////////////////////////////////////////////////////
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// Reference CPU histogram
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////////////////////////////////////////////////////////////////////////////////
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extern "C" void histogram64CPU(uint *h_Histogram, void *h_Data, uint byteCount);
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extern "C" void histogram256CPU(uint *h_Histogram, void *h_Data,
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uint byteCount);
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////////////////////////////////////////////////////////////////////////////////
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// GPU histogram
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////////////////////////////////////////////////////////////////////////////////
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extern "C" void initHistogram64(void);
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extern "C" void initHistogram256(void);
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extern "C" void closeHistogram64(void);
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extern "C" void closeHistogram256(void);
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extern "C" void histogram64(uint *d_Histogram, void *d_Data, uint byteCount);
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extern "C" void histogram256(uint *d_Histogram, void *d_Data, uint byteCount);
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#endif
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