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//
// 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.
//
// Copyright (c) 2018 NVIDIA Corporation. All rights reserved.
#include "RTdef.h"
#if RT_COMPILE
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Contains source code from the article "Radix Sort Revisited".
* \file IceRevisitedRadix.h
* \author Pierre Terdiman
* \date April, 4, 2000
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Include Guard
#ifndef __ICERADIXSORT_BASE_H__
#define __ICERADIXSORT_BASE_H__
#include "PxSimpleTypes.h"
#include "ApexUsingNamespace.h"
#include <PsUserAllocated.h>
namespace nvidia
{
namespace fracture
{
namespace base
{
class RadixSort : public UserAllocated
{
public:
// Constructor/Destructor
RadixSort();
virtual ~RadixSort();
// Sorting methods
RadixSort& Sort(const uint32_t* input, uint32_t nb, bool signedvalues=true);
RadixSort& Sort(const float* input, uint32_t nb);
//! Access to results. mRanks is a list of indices in sorted order, i.e. in the order you may further process your data
inline uint32_t* GetRanks() const { return mRanks; }
//! mIndices2 gets trashed on calling the sort routine, but otherwise you can recycle it the way you want.
inline uint32_t* GetRecyclable() const { return mRanks2; }
// Stats
uint32_t GetUsedRam() const;
//! Returns the total number of calls to the radix sorter.
inline uint32_t GetNbTotalCalls() const { return mTotalCalls; }
//! Returns the number of premature exits due to temporal coherence.
inline uint32_t GetNbHits() const { return mNbHits; }
private:
uint32_t mHistogram[256*4]; //!< Counters for each byte
uint32_t mOffset[256]; //!< Offsets (nearly a cumulative distribution function)
uint32_t mCurrentSize; //!< Current size of the indices list
uint32_t mRanksSize;
uint32_t* mRanks; //!< Two lists, swapped each pass
uint32_t* mRanks2;
// Stats
uint32_t mTotalCalls;
uint32_t mNbHits;
// Internal methods
void CheckResize(uint32_t nb);
bool Resize(uint32_t nb);
};
}
}
}
#endif // __ICERADIXSORT_H__
#endif
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