/usr/include/thrust/detail/mpl/math.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.
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* 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.
*/
/*! \file math.h
* \brief Math-related metaprogramming functionality.
*/
#pragma once
namespace thrust
{
namespace detail
{
namespace mpl
{
namespace math
{
namespace detail
{
// compute the log base-2 of an integer at compile time
template <unsigned int N, unsigned int Cur>
struct log2
{
static const unsigned int value = log2<N / 2,Cur+1>::value;
};
template <unsigned int Cur>
struct log2<1, Cur>
{
static const unsigned int value = Cur;
};
template <unsigned int Cur>
struct log2<0, Cur>
{
// undefined
};
} // end namespace detail
template <unsigned int N>
struct log2
{
static const unsigned int value = detail::log2<N,0>::value;
};
template <typename T, T lhs, T rhs>
struct min
{
static const T value = (lhs < rhs) ? lhs : rhs;
};
template <typename T, T lhs, T rhs>
struct max
{
static const T value = (!(lhs < rhs)) ? lhs : rhs;
};
template<typename result_type, result_type x, result_type y>
struct mul
{
static const result_type value = x * y;
};
template<typename result_type, result_type x, result_type y>
struct mod
{
static const result_type value = x % y;
};
template<typename result_type, result_type x, result_type y>
struct div
{
static const result_type value = x / y;
};
template<typename result_type, result_type x, result_type y>
struct geq
{
static const bool value = x >= y;
};
template<typename result_type, result_type x, result_type y>
struct lt
{
static const bool value = x < y;
};
template<typename result_type, result_type x, result_type y>
struct gt
{
static const bool value = x > y;
};
template<bool x, bool y>
struct or_
{
static const bool value = (x || y);
};
template<typename result_type, result_type x, result_type y>
struct bit_and
{
static const result_type value = x & y;
};
template<typename result_type, result_type x, result_type y>
struct plus
{
static const result_type value = x + y;
};
template<typename result_type, result_type x, result_type y>
struct minus
{
static const result_type value = x - y;
};
template<typename result_type, result_type x, result_type y>
struct equal
{
static const bool value = x == y;
};
template<typename result_type, result_type x>
struct is_odd
{
static const bool value = x & 1;
};
} // end namespace math
} // end namespace mpl
} // end namespace detail
} // end namespace thrust
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