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80 lines
3.9 KiB
C
80 lines
3.9 KiB
C
/* 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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// Definitions for GPU quicksort
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#ifndef QUICKSORT_H
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#define QUICKSORT_H
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#define QSORT_BLOCKSIZE_SHIFT 9
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#define QSORT_BLOCKSIZE (1 << QSORT_BLOCKSIZE_SHIFT)
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#define BITONICSORT_LEN 1024 // Must be power of 2!
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#define QSORT_MAXDEPTH \
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16 // Will force final bitonic stage at depth QSORT_MAXDEPTH+1
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////////////////////////////////////////////////////////////////////////////////
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// The algorithm uses several variables updated by using atomic operations.
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////////////////////////////////////////////////////////////////////////////////
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typedef struct __align__(128) qsortAtomicData_t {
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volatile unsigned int lt_offset; // Current output offset for <pivot
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volatile unsigned int gt_offset; // Current output offset for >pivot
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volatile unsigned int sorted_count; // Total count sorted, for deciding when
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// to launch next wave
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volatile unsigned int
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index; // Ringbuf tracking index. Can be ignored if not using ringbuf.
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}
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qsortAtomicData;
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////////////////////////////////////////////////////////////////////////////////
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// A ring-buffer for rapid stack allocation
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////////////////////////////////////////////////////////////////////////////////
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typedef struct qsortRingbuf_t {
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volatile unsigned int head; // Head pointer - we allocate from here
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volatile unsigned int
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tail; // Tail pointer - indicates last still-in-use element
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volatile unsigned int count; // Total count allocated
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volatile unsigned int max; // Max index allocated
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unsigned int stacksize; // Wrap-around size of buffer (must be power of 2)
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volatile void *stackbase; // Pointer to the stack we're allocating from
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} qsortRingbuf;
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// Stack elem count must be power of 2!
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#define QSORT_STACK_ELEMS \
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1 * 1024 * 1024 // One million stack elements is a HUGE number.
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__global__ void qsort_warp(unsigned *indata, unsigned *outdata,
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unsigned int len, qsortAtomicData *atomicData,
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qsortRingbuf *ringbuf, unsigned int source_is_indata,
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unsigned int depth);
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__global__ void bitonicsort(unsigned *indata, unsigned *outdata,
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unsigned int offset, unsigned int len);
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__global__ void big_bitonicsort(unsigned *indata, unsigned *outdata,
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unsigned *backbuf, unsigned int offset,
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unsigned int len);
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#endif // QUICKSORT_H
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