/build/reproducible-path/rocrand-6.4.1/library/include/rocrand/rocrand_threefry2x32_20.h Source File

/build/reproducible-path/rocrand-6.4.1/library/include/rocrand/rocrand_threefry2x32_20.h Source File#

API library: /build/reproducible-path/rocrand-6.4.1/library/include/rocrand/rocrand_threefry2x32_20.h Source File
rocrand_threefry2x32_20.h
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21/*
22Copyright 2010-2011, D. E. Shaw Research.
23All rights reserved.
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26modification, are permitted provided that the following conditions are
27met:
28
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52
53#ifndef ROCRAND_THREEFRY2X32_20_H_
54#define ROCRAND_THREEFRY2X32_20_H_
55
56#include "rocrand/rocrand_threefry2_impl.h"
57
58namespace rocrand_device
59{
60
61class threefry2x32_20_engine : public threefry_engine2_base<uint2, unsigned int, 20>
62{
63public:
64 ROCRAND_DEPRECATED("Alias \"threefry2x32_20_state\" is deprecated. Use \"state_type\" instead.")
65 typedef threefry_engine2_base<uint2, unsigned int, 20>::threefry_state_2 threefry2x32_20_state;
66
72 __forceinline__ __device__ __host__ threefry2x32_20_engine(const unsigned long long seed = 0,
73 const unsigned long long subsequence
74 = 0,
75 const unsigned long long offset = 0)
76 {
77 this->seed(seed, subsequence, offset);
78 }
79
85 __forceinline__ __device__ __host__ void seed(const unsigned long long seed = 0,
86 const unsigned long long subsequence = 0,
87 const unsigned long long offset = 0)
88 {
89 m_state.counter = {0U, 0U};
90 m_state.result = {0U, 0U};
91 m_state.substate = 0;
92
93 m_state.key = {static_cast<unsigned int>(seed), static_cast<unsigned int>(seed >> 32)};
94
95 this->discard_subsequence_impl(subsequence);
96 this->discard(offset);
97 m_state.result = this->threefry_rounds(m_state.counter, m_state.key);
98 }
99
100}; // threefry2x32_20_engine class
101
102} // end namespace rocrand_device
103
104typedef rocrand_device::threefry2x32_20_engine rocrand_state_threefry2x32_20;
105
117__forceinline__ __device__ __host__ void rocrand_init(const unsigned long long seed,
118 const unsigned long long subsequence,
119 const unsigned long long offset,
120 rocrand_state_threefry2x32_20* state)
121{
122 *state = rocrand_state_threefry2x32_20(seed, subsequence, offset);
123}
124
139__forceinline__ __device__ __host__ unsigned int rocrand(rocrand_state_threefry2x32_20* state)
140{
141 return state->next();
142}
143
156__forceinline__ __device__ __host__ uint2 rocrand2(rocrand_state_threefry2x32_20* state)
157{
158 return state->next2();
159}
160
161#endif // ROCRAND_THREEFRY2X32_20_H_
__forceinline__ __device__ __host__ void rocrand_init(const uint4 seed, const unsigned int subsequence, rocrand_state_lfsr113 *state)
Initializes LFSR113 state.
Definition rocrand_lfsr113.h:238
__forceinline__ __device__ __host__ unsigned int rocrand(rocrand_state_lfsr113 *state)
Returns uniformly distributed random unsigned int value from [0; 2^32 - 1] range.
Definition rocrand_lfsr113.h:274