/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-rocrand/checkouts/docs-6.1.2/library/include/rocrand/rocrand_threefry2x64_20.h Source File

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-rocrand/checkouts/docs-6.1.2/library/include/rocrand/rocrand_threefry2x64_20.h Source File#

API library: /home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-rocrand/checkouts/docs-6.1.2/library/include/rocrand/rocrand_threefry2x64_20.h Source File
API library
rocrand_threefry2x64_20.h
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52 
53 #ifndef ROCRAND_THREEFRY2X64_20_H_
54 #define ROCRAND_THREEFRY2X64_20_H_
55 
56 #ifndef FQUALIFIERS
57  #define FQUALIFIERS __forceinline__ __device__
58 #endif // FQUALIFIERS
59 
60 #include "rocrand/rocrand_threefry2_impl.h"
61 
62 namespace rocrand_device
63 {
64 
65 class threefry2x64_20_engine : public threefry_engine2_base<ulonglong2, unsigned long long, 20>
66 {
67 public:
68  typedef threefry_engine2_base<ulonglong2, unsigned long long, 20>::threefry_state_2
69  threefry2x64_20_state;
70 
76  FQUALIFIERS threefry2x64_20_engine(const unsigned long long seed = 0,
77  const unsigned long long subsequence = 0,
78  const unsigned long long offset = 0)
79  {
80  this->seed(seed, subsequence, offset);
81  }
82 
88  FQUALIFIERS void seed(const unsigned long long seed = 0,
89  const unsigned long long subsequence = 0,
90  const unsigned long long offset = 0)
91  {
92  m_state.counter = {0ULL, 0ULL};
93  m_state.key = {seed, seed >> 32};
94  m_state.result = {0ULL, 0ULL};
95  m_state.substate = 0;
96 
97  this->discard_subsequence_impl(subsequence);
98  this->discard(offset);
99  m_state.result = this->threefry_rounds(m_state.counter, m_state.key);
100  }
101 
102 }; // threefry2x64_20_engine class
103 
104 } // end namespace rocrand_device
105 
106 typedef rocrand_device::threefry2x64_20_engine rocrand_state_threefry2x64_20;
107 
119 FQUALIFIERS void rocrand_init(const unsigned long long seed,
120  const unsigned long long subsequence,
121  const unsigned long long offset,
122  rocrand_state_threefry2x64_20* state)
123 {
124  *state = rocrand_state_threefry2x64_20(seed, subsequence, offset);
125 }
126 
141 FQUALIFIERS unsigned long long rocrand(rocrand_state_threefry2x64_20* state)
142 {
143  return state->next();
144 }
145 
158 FQUALIFIERS ulonglong2 rocrand2(rocrand_state_threefry2x64_20* state)
159 {
160  return state->next2();
161 }
162 
163 #endif // ROCRAND_THREEFRY2X64_20_H_
FQUALIFIERS unsigned int rocrand(rocrand_state_lfsr113 *state)
Returns uniformly distributed random unsigned int value from [0; 2^32 - 1] range.
Definition: rocrand_lfsr113.h:253
FQUALIFIERS void rocrand_init(const uint4 seed, const unsigned int subsequence, rocrand_state_lfsr113 *state)
Initializes LFSR113 state.
Definition: rocrand_lfsr113.h:235
#define FQUALIFIERS
Shorthand for commonly used function qualifiers.
Definition: rocrand_uniform.h:31