/usr/include/thrust/random/detail/mod.h is in libthrust-dev 1.6.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 | /*
* Copyright 2008-2012 NVIDIA Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
namespace thrust
{
namespace random
{
namespace detail
{
template<typename T, T a, T c, T m, bool = (m == 0)>
struct static_mod
{
static const T q = m / a;
static const T r = m % a;
__host__ __device__
T operator()(T x) const
{
if(a == 1)
{
x %= m;
}
else
{
T t1 = a * (x % q);
T t2 = r * (x / q);
if(t1 >= t2)
{
x = t1 - t2;
}
else
{
x = m - t2 + t1;
}
}
if(c != 0)
{
const T d = m - x;
if(d > c)
{
x += c;
}
else
{
x = c - d;
}
}
return x;
}
}; // end static_mod
// Rely on machine overflow handling
template<typename T, T a, T c, T m>
struct static_mod<T,a,c,m,true>
{
__host__ __device__
T operator()(T x) const
{
return a * x + c;
}
}; // end static_mod
template<typename T, T a, T c, T m>
__host__ __device__
T mod(T x)
{
static_mod<T,a,c,m> f;
return f(x);
}; // end static_mod
} // end detail
} // end random
} // end thrust
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