/build/rocrand-7S8maf/rocrand-7.1.1/library/include/rocrand/rocrand_threefry2x32_20.h Source File

/build/rocrand-7S8maf/rocrand-7.1.1/library/include/rocrand/rocrand_threefry2x32_20.h Source File#

API library: /build/rocrand-7S8maf/rocrand-7.1.1/library/include/rocrand/rocrand_threefry2x32_20.h Source File
library
include
rocrand
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/*
Copyright 2010-2011, D. E. Shaw Research.
All rights reserved.
 
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 D. E. Shaw Research 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 AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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*/
 
#ifndef ROCRAND_THREEFRY2X32_20_H_
#define ROCRAND_THREEFRY2X32_20_H_
 
#include "rocrand/rocrand_threefry2_impl.h"
 
#include <hip/hip_runtime.h>
 
namespace rocrand_device
{
 
class threefry2x32_20_engine : public threefry_engine2_base<uint2, unsigned int, 20>
{
public:
    ROCRAND_DEPRECATED("Alias \"threefry2x32_20_state\" is deprecated. Use \"state_type\" instead.")
    typedef threefry_engine2_base<uint2, unsigned int, 20>::threefry_state_2 threefry2x32_20_state;
    __forceinline__ __device__ __host__ threefry2x32_20_engine(const unsigned long long seed = 0,
                                                               const unsigned long long subsequence
                                                               = 0,
                                                               const unsigned long long offset = 0)
    {
        this->seed(seed, subsequence, offset);
    }
    __forceinline__ __device__ __host__ void seed(const unsigned long long seed        = 0,
                                                  const unsigned long long subsequence = 0,
                                                  const unsigned long long offset      = 0)
    {
        m_state.counter  = {0U, 0U};
        m_state.result   = {0U, 0U};
        m_state.substate = 0;
 
        m_state.key = {static_cast<unsigned int>(seed), static_cast<unsigned int>(seed >> 32)};
 
        this->discard_subsequence_impl(subsequence);
        this->discard(offset);
        m_state.result = this->threefry_rounds(m_state.counter, m_state.key);
    }
 
}; // threefry2x32_20_engine class
 
} // end namespace rocrand_device
 
typedef rocrand_device::threefry2x32_20_engine rocrand_state_threefry2x32_20;
__forceinline__ __device__ __host__
void rocrand_init(const unsigned long long       seed,
                  const unsigned long long       subsequence,
                  const unsigned long long       offset,
                  rocrand_state_threefry2x32_20* state)
{
    *state = rocrand_state_threefry2x32_20(seed, subsequence, offset);
}
__forceinline__ __device__ __host__
unsigned int rocrand(rocrand_state_threefry2x32_20* state)
{
    return state->next();
}
__forceinline__ __device__ __host__
uint2 rocrand2(rocrand_state_threefry2x32_20* state)
{
    return state->next2();
}
 
#endif // ROCRAND_THREEFRY2X32_20_H_