Program Listing for File rocrand_scrambled_sobol32.h

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// Copyright (c) 2022 Advanced Micro Devices, Inc. All rights reserved.
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// furnished to do so, subject to the following conditions:
//
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#ifndef ROCRAND_SCRAMBLED_SOBOL32_H_
#define ROCRAND_SCRAMBLED_SOBOL32_H_

#ifndef FQUALIFIERS
    #define FQUALIFIERS __forceinline__ __device__
#endif // FQUALIFIERS_

#include "rocrand/rocrand_common.h"
#include "rocrand/rocrand_sobol32.h"

namespace rocrand_device
{

template<bool UseSharedVectors>
class scrambled_sobol32_engine
{
public:
    FQUALIFIERS
    scrambled_sobol32_engine() {}

    FQUALIFIERS
    scrambled_sobol32_engine(const unsigned int* vectors,
                             const unsigned int  scramble_constant,
                             const unsigned int  offset)
        : m_engine(vectors, 0), scramble_constant(scramble_constant)
    {
        discard(offset);
    }

    FQUALIFIERS
    void discard(unsigned int offset)
    {
        m_engine.discard(offset);
    }

    FQUALIFIERS
    void discard()
    {
        m_engine.discard();
    }

    FQUALIFIERS
    void discard_stride(unsigned int stride)
    {
        m_engine.discard_stride(stride);
    }

    FQUALIFIERS
    unsigned int operator()()
    {
        return this->next();
    }

    FQUALIFIERS
    unsigned int next()
    {
        unsigned int p = m_engine.next();
        return p ^ scramble_constant;
    }

    FQUALIFIERS
    unsigned int current()
    {
        unsigned int p = m_engine.current();
        return p ^ scramble_constant;
    }

protected:
    // Underlying sobol32 engine
    sobol32_engine<UseSharedVectors> m_engine;
    // scrambling constant
    unsigned int scramble_constant;

}; // scrambled_sobol32_engine class

} // end namespace rocrand_device

typedef rocrand_device::scrambled_sobol32_engine<false> rocrand_state_scrambled_sobol32;

FQUALIFIERS
void rocrand_init(const unsigned int*              vectors,
                  const unsigned int               scramble_constant,
                  const unsigned int               offset,
                  rocrand_state_scrambled_sobol32* state)
{
    *state = rocrand_state_scrambled_sobol32(vectors, scramble_constant, offset);
}

FQUALIFIERS
unsigned int rocrand(rocrand_state_scrambled_sobol32* state)
{
    return state->next();
}

FQUALIFIERS
void skipahead(unsigned long long offset, rocrand_state_scrambled_sobol32* state)
{
    return state->discard(offset);
}

 // end of group rocranddevice
#endif // ROCRAND_SCRAMBLED_SOBOL32_H_