/build/reproducible-path/rocrand-6.4.1/library/include/rocrand/rocrand_scrambled_sobol64.h Source File

/build/reproducible-path/rocrand-6.4.1/library/include/rocrand/rocrand_scrambled_sobol64.h Source File#

API library: /build/reproducible-path/rocrand-6.4.1/library/include/rocrand/rocrand_scrambled_sobol64.h Source File
rocrand_scrambled_sobol64.h
1// Copyright (c) 2022-2024 Advanced Micro Devices, Inc. All rights reserved.
2//
3// Permission is hereby granted, free of charge, to any person obtaining a copy
4// of this software and associated documentation files (the "Software"), to deal
5// in the Software without restriction, including without limitation the rights
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7// copies of the Software, and to permit persons to whom the Software is
8// furnished to do so, subject to the following conditions:
9//
10// The above copyright notice and this permission notice shall be included in
11// all copies or substantial portions of the Software.
12//
13// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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18// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19// THE SOFTWARE.
20
21#ifndef ROCRAND_SCRAMBLED_SOBOL64_H_
22#define ROCRAND_SCRAMBLED_SOBOL64_H_
23
24#include "rocrand/rocrand_common.h"
25#include "rocrand/rocrand_sobol64.h"
26
27namespace rocrand_device
28{
29
30template<bool UseSharedVectors>
31class scrambled_sobol64_engine
32{
33public:
34 __forceinline__ __device__ __host__ scrambled_sobol64_engine() : scramble_constant() {}
35
36 __forceinline__ __device__ __host__
37 scrambled_sobol64_engine(const unsigned long long int* vectors,
38 const unsigned long long int scramble_constant,
39 const unsigned int offset)
40 : m_engine(vectors, 0), scramble_constant(scramble_constant)
41 {
42 discard(offset);
43 }
44
46 __forceinline__ __device__ __host__ void discard(unsigned long long int offset)
47 {
48 m_engine.discard(offset);
49 }
50
51 __forceinline__ __device__ __host__ void discard()
52 {
53 m_engine.discard();
54 }
55
57 __forceinline__ __device__ __host__ void discard_stride(unsigned long long int stride)
58 {
59 m_engine.discard_stride(stride);
60 }
61
62 __forceinline__ __device__ __host__ unsigned long long int operator()()
63 {
64 return this->next();
65 }
66
67 __forceinline__ __device__ __host__ unsigned long long int next()
68 {
69 unsigned long long int p = m_engine.next();
70 return p ^ scramble_constant;
71 }
72
73 __forceinline__ __device__ __host__ unsigned long long int current()
74 {
75 unsigned long long int p = m_engine.current();
76 return p ^ scramble_constant;
77 }
78
79 __forceinline__ __device__ __host__ static constexpr bool uses_shared_vectors()
80 {
81 return UseSharedVectors;
82 }
83
84protected:
85 // Underlying sobol64 engine
86 sobol64_engine<UseSharedVectors> m_engine;
87 // scrambling constant
88 unsigned long long int scramble_constant;
89
90}; // scrambled_sobol64_engine class
91
92} // end namespace rocrand_device
93
100typedef rocrand_device::scrambled_sobol64_engine<false> rocrand_state_scrambled_sobol64;
102
114__forceinline__ __device__ __host__ void
115 rocrand_init(const unsigned long long int* vectors,
116 const unsigned long long int scramble_constant,
117 const unsigned int offset,
118 rocrand_state_scrambled_sobol64* state)
119{
120 *state = rocrand_state_scrambled_sobol64(vectors, scramble_constant, offset);
121}
122
135__forceinline__ __device__ __host__ unsigned long long int
136 rocrand(rocrand_state_scrambled_sobol64* state)
137{
138 return state->next();
139}
140
149__forceinline__ __device__ __host__ void skipahead(unsigned long long offset,
150 rocrand_state_scrambled_sobol64* state)
151{
152 return state->discard(offset);
153}
154
// end of group rocranddevice
156
157#endif // ROCRAND_SCRAMBLED_SOBOL64_H_
__forceinline__ __device__ __host__ unsigned long long int rocrand(rocrand_state_scrambled_sobol64 *state)
Returns uniformly distributed random unsigned long long int value from [0; 2^64 - 1] range.
Definition rocrand_scrambled_sobol64.h:136
__forceinline__ __device__ __host__ void skipahead(unsigned long long offset, rocrand_state_scrambled_sobol64 *state)
Updates scrambled_sobol64 state to skip ahead by offset elements.
Definition rocrand_scrambled_sobol64.h:149
__forceinline__ __device__ __host__ void rocrand_init(const unsigned long long int *vectors, const unsigned long long int scramble_constant, const unsigned int offset, rocrand_state_scrambled_sobol64 *state)
Initialize scrambled_sobol64 state.
Definition rocrand_scrambled_sobol64.h:115