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API library: /home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-rocrand/checkouts/docs-6.2.1/library/include/rocrand/rocrand_threefry_common.h Source File
API library
rocrand_threefry_common.h
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21 /*
22 Copyright 2010-2011, D. E. Shaw Research.
23 All rights reserved.
24 
25 Redistribution and use in source and binary forms, with or without
26 modification, are permitted provided that the following conditions are
27 met:
28 
29 * Redistributions of source code must retain the above copyright
30  notice, this list of conditions, and the following disclaimer.
31 
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33  notice, this list of conditions, and the following disclaimer in the
34  documentation and/or other materials provided with the distribution.
35 
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37  contributors may be used to endorse or promote products derived from
38  this software without specific prior written permission.
39 
40 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
41 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
42 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
43 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
44 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
46 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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49 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
50 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
51 */
52 
53 #ifndef ROCRAND_THREEFRY_COMMON_H_
54 #define ROCRAND_THREEFRY_COMMON_H_
55 
56 #include "rocrand/rocrand_common.h"
57 
58 // C240 constant for Skein Hash function Threefish
59 #define SKEIN_MK_64(hi32, lo32) ((lo32) + (((unsigned long long)(hi32)) << 32))
60 #define SKEIN_KS_PARITY64 SKEIN_MK_64(0x1BD11BDA, 0xA9FC1A22)
61 #define SKEIN_KS_PARITY32 0x1BD11BDA
62 
63 namespace rocrand_device
64 {
65 
66 template<typename value>
67 __forceinline__ __device__ __host__ value rotl(value x, int d);
68 
69 template<>
70 __forceinline__ __device__ __host__ unsigned long long
71  rotl<unsigned long long>(unsigned long long x, int d)
72 {
73  return ((x << d) | (x >> (64 - d) & 63));
74 };
75 
76 template<>
77 __forceinline__ __device__ __host__ unsigned int rotl<unsigned int>(unsigned int x, int d)
78 {
79  return (x << (d & 31)) | (x >> ((32 - d) & 31));
80 };
81 
82 template<typename value>
83 __forceinline__ __device__ __host__ value skein_ks_parity();
84 
85 template<>
86 __forceinline__ __device__ __host__ unsigned int skein_ks_parity<unsigned int>()
87 {
88  return SKEIN_KS_PARITY32;
89 }
90 
91 template<>
92 __forceinline__ __device__ __host__ unsigned long long skein_ks_parity<unsigned long long>()
93 {
94  return SKEIN_KS_PARITY64;
95 }
96 
97 } // end namespace rocrand_device
98 
99 #endif // ROCRAND_THREEFRY_COMMON_H_
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