//=============================================================================
//
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt for details.
//
//  This software is distributed WITHOUT ANY WARRANTY; without even
//  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
//  PURPOSE.  See the above copyright notice for more information.
//
//  Copyright 2015 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
//  Copyright 2015 UT-Battelle, LLC.
//  Copyright 2015 Los Alamos National Security.
//
//  Under the terms of Contract DE-NA0003525 with NTESS,
//  the U.S. Government retains certain rights in this software.
//  Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
//  Laboratory (LANL), the U.S. Government retains certain rights in
//  this software.
//
//=============================================================================
// **** DO NOT EDIT THIS FILE!!! ****
// This file is automatically generated by Math.h.in

#ifndef vtk_m_Math_h
#define vtk_m_Math_h

#include <vtkm/TypeTraits.h>
#include <vtkm/Types.h>
#include <vtkm/VecTraits.h>

#ifndef VTKM_CUDA
#include <cmath>
#include <limits.h>
#include <math.h>
#include <stdlib.h>
#endif // !VTKM_CUDA

#if !defined(__CUDA_ARCH__)
#define VTKM_USE_STL
#include <algorithm>
#endif

#if defined(VTKM_MSVC) && !defined(VTKM_CUDA)
#include <math.h>
#endif

#define VTKM_CUDA_MATH_FUNCTION_32(func) func##f
#define VTKM_CUDA_MATH_FUNCTION_64(func) func

namespace vtkm
{

//-----------------------------------------------------------------------------
/// Returns the constant 2 times Pi.
///
static inline VTKM_EXEC_CONT vtkm::Float64 TwoPi()
{
  return 6.28318530717958647692528676655900576;
}

/// Returns the constant Pi.
///
static inline VTKM_EXEC_CONT vtkm::Float64 Pi()
{
  return 3.14159265358979323846264338327950288;
}

/// Returns the constant Pi halves.
///
static inline VTKM_EXEC_CONT vtkm::Float64 Pi_2()
{
  return 1.57079632679489661923132169163975144;
}
/// Returns the constant Pi thirds.
///
static inline VTKM_EXEC_CONT vtkm::Float64 Pi_3()
{
  return 1.04719755119659774615421446109316762;
}

/// Returns the constant Pi fourths.
///
static inline VTKM_EXEC_CONT vtkm::Float64 Pi_4()
{
  return 0.78539816339744830961566084581987572;
}

namespace detail
{

template <typename T>
struct FloatingPointReturnCondition
  : std::enable_if<
      std::is_same<typename vtkm::VecTraits<T>::ComponentType, vtkm::Float32>::value ||
      std::is_same<typename vtkm::VecTraits<T>::ComponentType, const vtkm::Float32>::value>
{
};

template <typename T, typename = void>
struct FloatingPointReturnType
{
  using Type = vtkm::Float64;
};

template <typename T>
struct FloatingPointReturnType<T, typename FloatingPointReturnCondition<T>::type>
{
  using Type = vtkm::Float32;
};
} // namespace detail

/// Compute the sine of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Sin(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(sin)(static_cast<vtkm::Float64>(x));
#else
  return std::sin(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Sin(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(sin)(x);
#else
  return std::sin(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Sin(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(sin)(x);
#else
  return std::sin(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Sin(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Sin(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Sin(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Sin(x[0]), vtkm::Sin(x[1]), vtkm::Sin(x[2]), vtkm::Sin(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Sin(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Sin(x[0]), vtkm::Sin(x[1]), vtkm::Sin(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Sin(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Sin(x[0]),
                                                                         vtkm::Sin(x[1]));
}

/// Compute the cosine of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Cos(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(cos)(static_cast<vtkm::Float64>(x));
#else
  return std::cos(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Cos(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(cos)(x);
#else
  return std::cos(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Cos(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(cos)(x);
#else
  return std::cos(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Cos(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Cos(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Cos(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Cos(x[0]), vtkm::Cos(x[1]), vtkm::Cos(x[2]), vtkm::Cos(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Cos(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Cos(x[0]), vtkm::Cos(x[1]), vtkm::Cos(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Cos(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Cos(x[0]),
                                                                         vtkm::Cos(x[1]));
}

/// Compute the tangent of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Tan(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(tan)(static_cast<vtkm::Float64>(x));
#else
  return std::tan(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Tan(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(tan)(x);
#else
  return std::tan(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Tan(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(tan)(x);
#else
  return std::tan(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Tan(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Tan(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Tan(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Tan(x[0]), vtkm::Tan(x[1]), vtkm::Tan(x[2]), vtkm::Tan(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Tan(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Tan(x[0]), vtkm::Tan(x[1]), vtkm::Tan(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Tan(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Tan(x[0]),
                                                                         vtkm::Tan(x[1]));
}

/// Compute the arc sine of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type ASin(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(asin)(static_cast<vtkm::Float64>(x));
#else
  return std::asin(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type ASin(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(asin)(x);
#else
  return std::asin(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type ASin(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(asin)(x);
#else
  return std::asin(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> ASin(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::ASin(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> ASin(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::ASin(x[0]), vtkm::ASin(x[1]), vtkm::ASin(x[2]), vtkm::ASin(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> ASin(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::ASin(x[0]), vtkm::ASin(x[1]), vtkm::ASin(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> ASin(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::ASin(x[0]),
                                                                         vtkm::ASin(x[1]));
}

/// Compute the arc cosine of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type ACos(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(acos)(static_cast<vtkm::Float64>(x));
#else
  return std::acos(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type ACos(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(acos)(x);
#else
  return std::acos(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type ACos(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(acos)(x);
#else
  return std::acos(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> ACos(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::ACos(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> ACos(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::ACos(x[0]), vtkm::ACos(x[1]), vtkm::ACos(x[2]), vtkm::ACos(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> ACos(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::ACos(x[0]), vtkm::ACos(x[1]), vtkm::ACos(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> ACos(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::ACos(x[0]),
                                                                         vtkm::ACos(x[1]));
}

/// Compute the arc tangent of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type ATan(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(atan)(static_cast<vtkm::Float64>(x));
#else
  return std::atan(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type ATan(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(atan)(x);
#else
  return std::atan(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type ATan(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(atan)(x);
#else
  return std::atan(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> ATan(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::ATan(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> ATan(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::ATan(x[0]), vtkm::ATan(x[1]), vtkm::ATan(x[2]), vtkm::ATan(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> ATan(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::ATan(x[0]), vtkm::ATan(x[1]), vtkm::ATan(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> ATan(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::ATan(x[0]),
                                                                         vtkm::ATan(x[1]));
}

/// Compute the arc tangent of \p x / \p y using the signs of both arguments
/// to determine the quadrant of the return value.
///
static inline VTKM_EXEC_CONT vtkm::Float32 ATan2(vtkm::Float32 x, vtkm::Float32 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(atan2)(x, y);
#else
  return std::atan2(x, y);
#endif
}
static inline VTKM_EXEC_CONT vtkm::Float64 ATan2(vtkm::Float64 x, vtkm::Float64 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(atan2)(x, y);
#else
  return std::atan2(x, y);
#endif
}

/// Compute the hyperbolic sine of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type SinH(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(sinh)(static_cast<vtkm::Float64>(x));
#else
  return std::sinh(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type SinH(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(sinh)(x);
#else
  return std::sinh(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type SinH(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(sinh)(x);
#else
  return std::sinh(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> SinH(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::SinH(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> SinH(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::SinH(x[0]), vtkm::SinH(x[1]), vtkm::SinH(x[2]), vtkm::SinH(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> SinH(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::SinH(x[0]), vtkm::SinH(x[1]), vtkm::SinH(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> SinH(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::SinH(x[0]),
                                                                         vtkm::SinH(x[1]));
}

/// Compute the hyperbolic cosine of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type CosH(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(cosh)(static_cast<vtkm::Float64>(x));
#else
  return std::cosh(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type CosH(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(cosh)(x);
#else
  return std::cosh(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type CosH(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(cosh)(x);
#else
  return std::cosh(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> CosH(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::CosH(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> CosH(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::CosH(x[0]), vtkm::CosH(x[1]), vtkm::CosH(x[2]), vtkm::CosH(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> CosH(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::CosH(x[0]), vtkm::CosH(x[1]), vtkm::CosH(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> CosH(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::CosH(x[0]),
                                                                         vtkm::CosH(x[1]));
}

/// Compute the hyperbolic tangent of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type TanH(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(tanh)(static_cast<vtkm::Float64>(x));
#else
  return std::tanh(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type TanH(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(tanh)(x);
#else
  return std::tanh(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type TanH(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(tanh)(x);
#else
  return std::tanh(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> TanH(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::TanH(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> TanH(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::TanH(x[0]), vtkm::TanH(x[1]), vtkm::TanH(x[2]), vtkm::TanH(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> TanH(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::TanH(x[0]), vtkm::TanH(x[1]), vtkm::TanH(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> TanH(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::TanH(x[0]),
                                                                         vtkm::TanH(x[1]));
}

/// Compute the hyperbolic arc sine of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type ASinH(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(asinh)(static_cast<vtkm::Float64>(x));
#else
  return std::asinh(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type ASinH(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(asinh)(x);
#else
  return std::asinh(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type ASinH(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(asinh)(x);
#else
  return std::asinh(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> ASinH(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::ASinH(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> ASinH(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::ASinH(x[0]), vtkm::ASinH(x[1]), vtkm::ASinH(x[2]), vtkm::ASinH(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> ASinH(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::ASinH(x[0]), vtkm::ASinH(x[1]), vtkm::ASinH(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> ASinH(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::ASinH(x[0]),
                                                                         vtkm::ASinH(x[1]));
}

/// Compute the hyperbolic arc cosine of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type ACosH(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(acosh)(static_cast<vtkm::Float64>(x));
#else
  return std::acosh(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type ACosH(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(acosh)(x);
#else
  return std::acosh(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type ACosH(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(acosh)(x);
#else
  return std::acosh(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> ACosH(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::ACosH(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> ACosH(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::ACosH(x[0]), vtkm::ACosH(x[1]), vtkm::ACosH(x[2]), vtkm::ACosH(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> ACosH(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::ACosH(x[0]), vtkm::ACosH(x[1]), vtkm::ACosH(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> ACosH(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::ACosH(x[0]),
                                                                         vtkm::ACosH(x[1]));
}

/// Compute the hyperbolic arc tangent of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type ATanH(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(atanh)(static_cast<vtkm::Float64>(x));
#else
  return std::atanh(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type ATanH(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(atanh)(x);
#else
  return std::atanh(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type ATanH(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(atanh)(x);
#else
  return std::atanh(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> ATanH(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::ATanH(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> ATanH(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::ATanH(x[0]), vtkm::ATanH(x[1]), vtkm::ATanH(x[2]), vtkm::ATanH(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> ATanH(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::ATanH(x[0]), vtkm::ATanH(x[1]), vtkm::ATanH(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> ATanH(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::ATanH(x[0]),
                                                                         vtkm::ATanH(x[1]));
}

//-----------------------------------------------------------------------------
/// Computes \p x raised to the power of \p y.
///
static inline VTKM_EXEC_CONT vtkm::Float32 Pow(vtkm::Float32 x, vtkm::Float32 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(pow)(x, y);
#else
  return std::pow(x, y);
#endif
}
static inline VTKM_EXEC_CONT vtkm::Float64 Pow(vtkm::Float64 x, vtkm::Float64 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(pow)(x, y);
#else
  return std::pow(x, y);
#endif
}

/// Compute the square root of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Sqrt(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(sqrt)(static_cast<vtkm::Float64>(x));
#else
  return std::sqrt(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Sqrt(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(sqrt)(x);
#else
  return std::sqrt(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Sqrt(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(sqrt)(x);
#else
  return std::sqrt(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Sqrt(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Sqrt(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Sqrt(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Sqrt(x[0]), vtkm::Sqrt(x[1]), vtkm::Sqrt(x[2]), vtkm::Sqrt(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Sqrt(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Sqrt(x[0]), vtkm::Sqrt(x[1]), vtkm::Sqrt(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Sqrt(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Sqrt(x[0]),
                                                                         vtkm::Sqrt(x[1]));
}

/// Compute the reciprocal square root of \p x. The result of this function is
/// equivalent to <tt>1/Sqrt(x)</tt>. However, on some devices it is faster to
/// compute the reciprocal square root than the regular square root. Thus, you
/// should use this function whenever dividing by the square root.
///
#ifdef VTKM_CUDA
static inline VTKM_EXEC_CONT vtkm::Float32 RSqrt(vtkm::Float32 x)
{
  return rsqrtf(x);
}
static inline VTKM_EXEC_CONT vtkm::Float64 RSqrt(vtkm::Float64 x)
{
  return rsqrt(x);
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Float64 RSqrt(T x)
{
  return rsqrt(static_cast<vtkm::Float64>(x));
}
#else  // !VTKM_CUDA
static inline VTKM_EXEC_CONT vtkm::Float32 RSqrt(vtkm::Float32 x)
{
  return 1 / vtkm::Sqrt(x);
}
static inline VTKM_EXEC_CONT vtkm::Float64 RSqrt(vtkm::Float64 x)
{
  return 1 / vtkm::Sqrt(x);
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Float64 RSqrt(T x)
{
  return 1 / static_cast<vtkm::Float64>(x);
}
#endif // !VTKM_CUDA

template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> RSqrt(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::RSqrt(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> RSqrt(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::RSqrt(x[0]), vtkm::RSqrt(x[1]), vtkm::RSqrt(x[2]), vtkm::RSqrt(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> RSqrt(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::RSqrt(x[0]), vtkm::RSqrt(x[1]), vtkm::RSqrt(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> RSqrt(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::RSqrt(x[0]),
                                                                         vtkm::RSqrt(x[1]));
}

/// Compute the cube root of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Cbrt(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(cbrt)(static_cast<vtkm::Float64>(x));
#else
  return std::cbrt(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Cbrt(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(cbrt)(x);
#else
  return std::cbrt(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Cbrt(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(cbrt)(x);
#else
  return std::cbrt(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Cbrt(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Cbrt(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Cbrt(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Cbrt(x[0]), vtkm::Cbrt(x[1]), vtkm::Cbrt(x[2]), vtkm::Cbrt(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Cbrt(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Cbrt(x[0]), vtkm::Cbrt(x[1]), vtkm::Cbrt(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Cbrt(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Cbrt(x[0]),
                                                                         vtkm::Cbrt(x[1]));
}

/// Compute the reciprocal cube root of \p x. The result of this function is
/// equivalent to <tt>1/Cbrt(x)</tt>. However, on some devices it is faster to
/// compute the reciprocal cube root than the regular cube root. Thus, you
/// should use this function whenever dividing by the cube root.
///
#ifdef VTKM_CUDA
static inline VTKM_EXEC_CONT vtkm::Float32 RCbrt(vtkm::Float32 x)
{
  return rcbrtf(x);
}
static inline VTKM_EXEC_CONT vtkm::Float64 RCbrt(vtkm::Float64 x)
{
  return rcbrt(x);
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Float64 RCbrt(T x)
{
  return rcbrt(static_cast<vtkm::Float64>(x));
}
#else  // !VTKM_CUDA
static inline VTKM_EXEC_CONT vtkm::Float32 RCbrt(vtkm::Float32 x)
{
  return 1 / vtkm::Cbrt(x);
}
static inline VTKM_EXEC_CONT vtkm::Float64 RCbrt(vtkm::Float64 x)
{
  return 1 / vtkm::Cbrt(x);
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Float64 RCbrt(T x)
{
  return 1 / vtkm::Cbrt(static_cast<vtkm::Float64>(x));
}
#endif // !VTKM_CUDA

template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> RCbrt(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::RCbrt(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> RCbrt(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::RCbrt(x[0]), vtkm::RCbrt(x[1]), vtkm::RCbrt(x[2]), vtkm::RCbrt(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> RCbrt(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::RCbrt(x[0]), vtkm::RCbrt(x[1]), vtkm::RCbrt(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> RCbrt(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::RCbrt(x[0]),
                                                                         vtkm::RCbrt(x[1]));
}

/// Computes e**\p x, the base-e exponential of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Exp(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(exp)(static_cast<vtkm::Float64>(x));
#else
  return std::exp(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Exp(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(exp)(x);
#else
  return std::exp(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Exp(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(exp)(x);
#else
  return std::exp(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Exp(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Exp(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Exp(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Exp(x[0]), vtkm::Exp(x[1]), vtkm::Exp(x[2]), vtkm::Exp(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Exp(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Exp(x[0]), vtkm::Exp(x[1]), vtkm::Exp(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Exp(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Exp(x[0]),
                                                                         vtkm::Exp(x[1]));
}

/// Computes 2**\p x, the base-2 exponential of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Exp2(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(exp2)(static_cast<vtkm::Float64>(x));
#else
  return std::exp2(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Exp2(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(exp2)(x);
#else
  return std::exp2(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Exp2(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(exp2)(x);
#else
  return std::exp2(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Exp2(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Exp2(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Exp2(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Exp2(x[0]), vtkm::Exp2(x[1]), vtkm::Exp2(x[2]), vtkm::Exp2(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Exp2(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Exp2(x[0]), vtkm::Exp2(x[1]), vtkm::Exp2(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Exp2(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Exp2(x[0]),
                                                                         vtkm::Exp2(x[1]));
}

/// Computes (e**\p x) - 1, the of base-e exponental of \p x then minus 1. The
/// accuracy of this function is good even for very small values of x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type ExpM1(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(expm1)(static_cast<vtkm::Float64>(x));
#else
  return std::expm1(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type ExpM1(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(expm1)(x);
#else
  return std::expm1(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type ExpM1(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(expm1)(x);
#else
  return std::expm1(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> ExpM1(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::ExpM1(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> ExpM1(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::ExpM1(x[0]), vtkm::ExpM1(x[1]), vtkm::ExpM1(x[2]), vtkm::ExpM1(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> ExpM1(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::ExpM1(x[0]), vtkm::ExpM1(x[1]), vtkm::ExpM1(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> ExpM1(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::ExpM1(x[0]),
                                                                         vtkm::ExpM1(x[1]));
}

/// Computes 10**\p x, the base-10 exponential of \p x.
///
#ifdef VTKM_CUDA
static inline VTKM_EXEC_CONT vtkm::Float32 Exp10(vtkm::Float32 x)
{
  return exp10f(x);
}
static inline VTKM_EXEC_CONT vtkm::Float64 Exp10(vtkm::Float64 x)
{
  return exp10(x);
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Float64 Exp10(T x)
{
  return exp10(static_cast<vtkm::Float64>(x));
}
#else  // !VTKM_CUDA
static inline VTKM_EXEC_CONT vtkm::Float32 Exp10(vtkm::Float32 x)
{
  return vtkm::Pow(10, x);
}
static inline VTKM_EXEC_CONT vtkm::Float64 Exp10(vtkm::Float64 x)
{
  return vtkm::Pow(10, x);
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Float64 Exp10(T x)
{
  return vtkm::Pow(10, static_cast<vtkm::Float64>(x));
}
#endif // !VTKM_CUDA

template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Exp10(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Exp10(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Exp10(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Exp10(x[0]), vtkm::Exp10(x[1]), vtkm::Exp10(x[2]), vtkm::Exp10(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Exp10(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Exp10(x[0]), vtkm::Exp10(x[1]), vtkm::Exp10(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Exp10(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Exp10(x[0]),
                                                                         vtkm::Exp10(x[1]));
}

/// Computes the natural logarithm of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Log(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(log)(static_cast<vtkm::Float64>(x));
#else
  return std::log(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Log(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(log)(x);
#else
  return std::log(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Log(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(log)(x);
#else
  return std::log(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Log(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Log(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Log(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Log(x[0]), vtkm::Log(x[1]), vtkm::Log(x[2]), vtkm::Log(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Log(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Log(x[0]), vtkm::Log(x[1]), vtkm::Log(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Log(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Log(x[0]),
                                                                         vtkm::Log(x[1]));
}

/// Computes the logarithm base 2 of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Log2(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(log2)(static_cast<vtkm::Float64>(x));
#else
  return std::log2(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Log2(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(log2)(x);
#else
  return std::log2(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Log2(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(log2)(x);
#else
  return std::log2(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Log2(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Log2(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Log2(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Log2(x[0]), vtkm::Log2(x[1]), vtkm::Log2(x[2]), vtkm::Log2(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Log2(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Log2(x[0]), vtkm::Log2(x[1]), vtkm::Log2(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Log2(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Log2(x[0]),
                                                                         vtkm::Log2(x[1]));
}

/// Computes the logarithm base 10 of \p x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Log10(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(log10)(static_cast<vtkm::Float64>(x));
#else
  return std::log10(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Log10(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(log10)(x);
#else
  return std::log10(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Log10(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(log10)(x);
#else
  return std::log10(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Log10(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Log10(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Log10(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Log10(x[0]), vtkm::Log10(x[1]), vtkm::Log10(x[2]), vtkm::Log10(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Log10(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Log10(x[0]), vtkm::Log10(x[1]), vtkm::Log10(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Log10(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Log10(x[0]),
                                                                         vtkm::Log10(x[1]));
}

/// Computes the value of log(1+x) accurately for very small values of x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Log1P(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(log1p)(static_cast<vtkm::Float64>(x));
#else
  return std::log1p(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Log1P(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(log1p)(x);
#else
  return std::log1p(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Log1P(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(log1p)(x);
#else
  return std::log1p(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Log1P(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Log1P(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Log1P(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Log1P(x[0]), vtkm::Log1P(x[1]), vtkm::Log1P(x[2]), vtkm::Log1P(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Log1P(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Log1P(x[0]), vtkm::Log1P(x[1]), vtkm::Log1P(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Log1P(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Log1P(x[0]),
                                                                         vtkm::Log1P(x[1]));
}

//-----------------------------------------------------------------------------
/// Returns \p x or \p y, whichever is larger.
///
template <typename T>
static inline VTKM_EXEC_CONT T Max(const T& x, const T& y);
#ifdef VTKM_USE_STL
static inline VTKM_EXEC_CONT vtkm::Float32 Max(vtkm::Float32 x, vtkm::Float32 y)
{
  return (std::max)(x, y);
}
static inline VTKM_EXEC_CONT vtkm::Float64 Max(vtkm::Float64 x, vtkm::Float64 y)
{
  return (std::max)(x, y);
}
#else // !VTKM_USE_STL
static inline VTKM_EXEC_CONT vtkm::Float32 Max(vtkm::Float32 x, vtkm::Float32 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(fmax)(x, y);
#else
  return std::fmax(x, y);
#endif
}
static inline VTKM_EXEC_CONT vtkm::Float64 Max(vtkm::Float64 x, vtkm::Float64 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(fmax)(x, y);
#else
  return std::fmax(x, y);
#endif
}
#endif // !VTKM_USE_STL

/// Returns \p x or \p y, whichever is smaller.
///
template <typename T>
static inline VTKM_EXEC_CONT T Min(const T& x, const T& y);
#ifdef VTKM_USE_STL
static inline VTKM_EXEC_CONT vtkm::Float32 Min(vtkm::Float32 x, vtkm::Float32 y)
{
  return (std::min)(x, y);
}
static inline VTKM_EXEC_CONT vtkm::Float64 Min(vtkm::Float64 x, vtkm::Float64 y)
{
  return (std::min)(x, y);
}
#else // !VTKM_USE_STL
static inline VTKM_EXEC_CONT vtkm::Float32 Min(vtkm::Float32 x, vtkm::Float32 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(fmin)(x, y);
#else
  return std::fmin(x, y);
#endif
}
static inline VTKM_EXEC_CONT vtkm::Float64 Min(vtkm::Float64 x, vtkm::Float64 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(fmin)(x, y);
#else
  return std::fmin(x, y);
#endif
}
#endif // !VTKM_USE_STL

namespace detail
{

template <typename T>
static inline VTKM_EXEC_CONT T Max(T x, T y, vtkm::TypeTraitsScalarTag)
{
  return (x < y) ? y : x;
}

template <typename T>
static inline VTKM_EXEC_CONT T Max(const T& x, const T& y, vtkm::TypeTraitsVectorTag)
{
  using Traits = vtkm::VecTraits<T>;
  T result;
  for (vtkm::IdComponent index = 0; index < Traits::NUM_COMPONENTS; index++)
  {
    Traits::SetComponent(
      result, index, vtkm::Max(Traits::GetComponent(x, index), Traits::GetComponent(y, index)));
  }
  return result;
}

template <typename T>
static inline VTKM_EXEC_CONT T Min(T x, T y, vtkm::TypeTraitsScalarTag)
{
  return (x < y) ? x : y;
}

template <typename T>
static inline VTKM_EXEC_CONT T Min(const T& x, const T& y, vtkm::TypeTraitsVectorTag)
{
  using Traits = vtkm::VecTraits<T>;
  T result;
  for (vtkm::IdComponent index = 0; index < Traits::NUM_COMPONENTS; index++)
  {
    Traits::SetComponent(
      result, index, vtkm::Min(Traits::GetComponent(x, index), Traits::GetComponent(y, index)));
  }
  return result;
}

} // namespace detail

/// Returns \p x or \p y, whichever is larger.
///
template <typename T>
static inline VTKM_EXEC_CONT T Max(const T& x, const T& y)
{
  return detail::Max(x, y, typename vtkm::TypeTraits<T>::DimensionalityTag());
}

/// Returns \p x or \p y, whichever is smaller.
///
template <typename T>
static inline VTKM_EXEC_CONT T Min(const T& x, const T& y)
{
  return detail::Min(x, y, typename vtkm::TypeTraits<T>::DimensionalityTag());
}

//-----------------------------------------------------------------------------

//#ifdef VTKM_CUDA
#define VTKM_USE_IEEE_NONFINITE
//#endif

#ifdef VTKM_USE_IEEE_NONFINITE

namespace detail
{

union IEEE754Bits32 {
  vtkm::UInt32 bits;
  vtkm::Float32 scalar;
};
#define VTKM_NAN_BITS_32 0x7FC00000U
#define VTKM_INF_BITS_32 0x7F800000U
#define VTKM_NEG_INF_BITS_32 0xFF800000U
#define VTKM_EPSILON_32 1e-5f

union IEEE754Bits64 {
  vtkm::UInt64 bits;
  vtkm::Float64 scalar;
};
#define VTKM_NAN_BITS_64 0x7FF8000000000000ULL
#define VTKM_INF_BITS_64 0x7FF0000000000000ULL
#define VTKM_NEG_INF_BITS_64 0xFFF0000000000000ULL
#define VTKM_EPSILON_64 1e-9

template <typename T>
struct FloatLimits;

template <>
struct FloatLimits<vtkm::Float32>
{
  using BitsType = vtkm::detail::IEEE754Bits32;

  VTKM_EXEC_CONT
  static vtkm::Float32 Nan()
  {
    BitsType nan = { VTKM_NAN_BITS_32 };
    return nan.scalar;
  }

  VTKM_EXEC_CONT
  static vtkm::Float32 Infinity()
  {
    BitsType inf = { VTKM_INF_BITS_32 };
    return inf.scalar;
  }

  VTKM_EXEC_CONT
  static vtkm::Float32 NegativeInfinity()
  {
    BitsType neginf = { VTKM_NEG_INF_BITS_32 };
    return neginf.scalar;
  }

  VTKM_EXEC_CONT
  static vtkm::Float32 Epsilon() { return VTKM_EPSILON_32; }
};

template <int N>
struct FloatLimits<vtkm::Vec<vtkm::Float32, N>>
{
  using BitsType = vtkm::detail::IEEE754Bits32;

  VTKM_EXEC_CONT
  static vtkm::Vec<vtkm::Float32, N> Nan()
  {
    BitsType nan = { VTKM_NAN_BITS_32 };
    return vtkm::Vec<vtkm::Float32, N>(nan.scalar);
  }

  VTKM_EXEC_CONT
  static vtkm::Vec<vtkm::Float32, N> Infinity()
  {
    BitsType inf = { VTKM_INF_BITS_32 };
    return vtkm::Vec<vtkm::Float32, N>(inf.scalar);
  }

  VTKM_EXEC_CONT
  static vtkm::Vec<vtkm::Float32, N> NegativeInfinity()
  {
    BitsType neginf = { VTKM_NEG_INF_BITS_32 };
    return vtkm::Vec<vtkm::Float32, N>(neginf.scalar);
  }

  VTKM_EXEC_CONT
  static vtkm::Vec<vtkm::Float32, N> Epsilon()
  {
    return vtkm::Vec<vtkm::Float32, N>(VTKM_EPSILON_32);
  }
};

template <>
struct FloatLimits<vtkm::Float64>
{
  using BitsType = vtkm::detail::IEEE754Bits64;

  VTKM_EXEC_CONT
  static vtkm::Float64 Nan()
  {
    BitsType nan = { VTKM_NAN_BITS_64 };
    return nan.scalar;
  }

  VTKM_EXEC_CONT
  static vtkm::Float64 Infinity()
  {
    BitsType inf = { VTKM_INF_BITS_64 };
    return inf.scalar;
  }

  VTKM_EXEC_CONT
  static vtkm::Float64 NegativeInfinity()
  {
    BitsType neginf = { VTKM_NEG_INF_BITS_64 };
    return neginf.scalar;
  }

  VTKM_EXEC_CONT
  static vtkm::Float64 Epsilon() { return VTKM_EPSILON_64; }
};

template <int N>
struct FloatLimits<vtkm::Vec<vtkm::Float64, N>>
{
  using BitsType = vtkm::detail::IEEE754Bits64;

  VTKM_EXEC_CONT
  static vtkm::Vec<vtkm::Float64, N> Nan()
  {
    BitsType nan = { VTKM_NAN_BITS_64 };
    return vtkm::Vec<vtkm::Float64, N>(nan.scalar);
  }

  VTKM_EXEC_CONT
  static vtkm::Vec<vtkm::Float64, N> Infinity()
  {
    BitsType inf = { VTKM_INF_BITS_64 };
    return vtkm::Vec<vtkm::Float64, N>(inf.scalar);
  }

  VTKM_EXEC_CONT
  static vtkm::Vec<vtkm::Float64, N> NegativeInfinity()
  {
    BitsType neginf = { VTKM_NEG_INF_BITS_64 };
    return vtkm::Vec<vtkm::Float64, N>(neginf.scalar);
  }

  VTKM_EXEC_CONT
  static vtkm::Vec<vtkm::Float64, N> Epsilon()
  {
    return vtkm::Vec<vtkm::Float64, N>(VTKM_EPSILON_64);
  }
};

#undef VTKM_NAN_BITS_32
#undef VTKM_INF_BITS_32
#undef VTKM_NEG_INF_BITS_32
#undef VTKM_EPSILON_32
#undef VTKM_NAN_BITS_64
#undef VTKM_INF_BITS_64
#undef VTKM_NEG_INF_BITS_64
#undef VTKM_EPSILON_64

} // namespace detail

/// Returns the representation for not-a-number (NaN).
///
template <typename T>
static inline VTKM_EXEC_CONT T Nan()
{
  return detail::FloatLimits<T>::Nan();
}

/// Returns the representation for infinity.
///
template <typename T>
static inline VTKM_EXEC_CONT T Infinity()
{
  return detail::FloatLimits<T>::Infinity();
}

/// Returns the representation for negative infinity.
///
template <typename T>
static inline VTKM_EXEC_CONT T NegativeInfinity()
{
  return detail::FloatLimits<T>::NegativeInfinity();
}

/// Returns the difference between 1 and the least value greater than 1
/// that is representable.
///
template <typename T>
static inline VTKM_EXEC_CONT T Epsilon()
{
  return detail::FloatLimits<T>::Epsilon();
}

#else  // !VTKM_USE_IEEE_NONFINITE

/// Returns the representation for not-a-number (NaN).
///
template <typename T>
static inline VTKM_EXEC_CONT T Nan()
{
  return std::numeric_limits<T>::quiet_NaN();
}

/// Returns the representation for infinity.
///
template <typename T>
static inline VTKM_EXEC_CONT T Infinity()
{
  return std::numeric_limits<T>::infinity();
}

/// Returns the representation for negative infinity.
///
template <typename T>
static inline VTKM_EXEC_CONT T NegativeInfinity()
{
  return -std::numeric_limits<T>::infinity();
}

/// Returns the difference between 1 and the least value greater than 1
/// that is representable.
///
template <typename T>
static inline VTKM_EXEC_CONT T Epsilon()
{
  return std::numeric_limits<T>::epsilon();
}
#endif // !VTKM_USE_IEEE_NONFINITE

/// Returns the representation for not-a-number (NaN).
///
static inline VTKM_EXEC_CONT vtkm::Float32 Nan32()
{
  return vtkm::Nan<vtkm::Float32>();
}
static inline VTKM_EXEC_CONT vtkm::Float64 Nan64()
{
  return vtkm::Nan<vtkm::Float64>();
}

/// Returns the representation for infinity.
///
static inline VTKM_EXEC_CONT vtkm::Float32 Infinity32()
{
  return vtkm::Infinity<vtkm::Float32>();
}
static inline VTKM_EXEC_CONT vtkm::Float64 Infinity64()
{
  return vtkm::Infinity<vtkm::Float64>();
}

/// Returns the representation for negative infinity.
///
static inline VTKM_EXEC_CONT vtkm::Float32 NegativeInfinity32()
{
  return vtkm::NegativeInfinity<vtkm::Float32>();
}
static inline VTKM_EXEC_CONT vtkm::Float64 NegativeInfinity64()
{
  return vtkm::NegativeInfinity<vtkm::Float64>();
}

/// Returns the difference between 1 and the least value greater than 1
/// that is representable.
///
static inline VTKM_EXEC_CONT vtkm::Float32 Epsilon32()
{
  return vtkm::Epsilon<vtkm::Float32>();
}
static inline VTKM_EXEC_CONT vtkm::Float64 Epsilon64()
{
  return vtkm::Epsilon<vtkm::Float64>();
}

//-----------------------------------------------------------------------------
/// Returns true if \p x is not a number.
///
template <typename T>
static inline VTKM_EXEC_CONT bool IsNan(T x)
{
#ifndef VTKM_CUDA
  using std::isnan;
#endif
  return (isnan(x) != 0);
}

/// Returns true if \p x is positive or negative infinity.
///
template <typename T>
static inline VTKM_EXEC_CONT bool IsInf(T x)
{
#ifndef VTKM_CUDA
  using std::isinf;
#endif
  return (isinf(x) != 0);
}

/// Returns true if \p x is a normal number (not NaN or infinite).
///
template <typename T>
static inline VTKM_EXEC_CONT bool IsFinite(T x)
{
#ifndef VTKM_CUDA
  using std::isfinite;
#endif
  return (isfinite(x) != 0);
}

//-----------------------------------------------------------------------------
/// Round \p x to the smallest integer value not less than x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Ceil(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(ceil)(static_cast<vtkm::Float64>(x));
#else
  return std::ceil(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Ceil(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(ceil)(x);
#else
  return std::ceil(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Ceil(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(ceil)(x);
#else
  return std::ceil(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Ceil(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Ceil(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Ceil(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Ceil(x[0]), vtkm::Ceil(x[1]), vtkm::Ceil(x[2]), vtkm::Ceil(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Ceil(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Ceil(x[0]), vtkm::Ceil(x[1]), vtkm::Ceil(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Ceil(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Ceil(x[0]),
                                                                         vtkm::Ceil(x[1]));
}

/// Round \p x to the largest integer value not greater than x.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Floor(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(floor)(static_cast<vtkm::Float64>(x));
#else
  return std::floor(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Floor(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(floor)(x);
#else
  return std::floor(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Floor(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(floor)(x);
#else
  return std::floor(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Floor(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Floor(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Floor(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Floor(x[0]), vtkm::Floor(x[1]), vtkm::Floor(x[2]), vtkm::Floor(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Floor(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Floor(x[0]), vtkm::Floor(x[1]), vtkm::Floor(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Floor(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Floor(x[0]),
                                                                         vtkm::Floor(x[1]));
}

/// Round \p x to the nearest integral value.
///
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Round(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(round)(static_cast<vtkm::Float64>(x));
#else
  return std::round(static_cast<vtkm::Float64>(x));
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float32>::Type Round(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(round)(x);
#else
  return std::round(x);
#endif
}
template <>
inline VTKM_EXEC_CONT detail::FloatingPointReturnType<vtkm::Float64>::Type Round(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(round)(x);
#else
  return std::round(x);
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> Round(
  const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Round(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4> Round(
  const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 4>(
    vtkm::Round(x[0]), vtkm::Round(x[1]), vtkm::Round(x[2]), vtkm::Round(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3> Round(
  const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 3>(
    vtkm::Round(x[0]), vtkm::Round(x[1]), vtkm::Round(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2> Round(
  const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<typename detail::FloatingPointReturnType<T>::Type, 2>(vtkm::Round(x[0]),
                                                                         vtkm::Round(x[1]));
}

//-----------------------------------------------------------------------------
/// Computes the remainder on division of 2 floating point numbers. The return
/// value is \p numerator - n \p denominator, where n is the quotient of \p
/// numerator divided by \p denominator rounded towards zero to an integer. For
/// example, <tt>FMod(6.5, 2.3)</tt> returns 1.9, which is 6.5 - 2*2.3.
///
static inline VTKM_EXEC_CONT vtkm::Float32 FMod(vtkm::Float32 x, vtkm::Float32 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(fmod)(x, y);
#else
  return std::fmod(x, y);
#endif
}
static inline VTKM_EXEC_CONT vtkm::Float64 FMod(vtkm::Float64 x, vtkm::Float64 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(fmod)(x, y);
#else
  return std::fmod(x, y);
#endif
}

/// Computes the remainder on division of 2 floating point numbers. The return
/// value is \p numerator - n \p denominator, where n is the quotient of \p
/// numerator divided by \p denominator rounded towards the nearest integer
/// (instead of toward zero like FMod). For example, <tt>FMod(6.5, 2.3)</tt>
/// returns -0.4, which is 6.5 - 3*2.3.
///
#ifdef VTKM_MSVC
template <typename T>
static inline VTKM_EXEC_CONT T Remainder(T numerator, T denominator)
{
  T quotient = vtkm::Round(numerator / denominator);
  return numerator - quotient * denominator;
}
#else // !VTKM_MSVC
static inline VTKM_EXEC_CONT vtkm::Float32 Remainder(vtkm::Float32 x, vtkm::Float32 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(remainder)(x, y);
#else
  return std::remainder(x, y);
#endif
}
static inline VTKM_EXEC_CONT vtkm::Float64 Remainder(vtkm::Float64 x, vtkm::Float64 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(remainder)(x, y);
#else
  return std::remainder(x, y);
#endif
}
#endif // !VTKM_MSVC

/// Returns the remainder on division of 2 floating point numbers just like
/// Remainder. In addition, this function also returns the \c quotient used to
/// get that remainder.
///
template <typename QType>
static inline VTKM_EXEC_CONT vtkm::Float32 RemainderQuotient(vtkm::Float32 numerator,
                                                             vtkm::Float32 denominator,
                                                             QType& quotient)
{
  int iQuotient;
  vtkm::Float32 result = std::remquo(numerator, denominator, &iQuotient);
  quotient = iQuotient;
  return result;
}
template <typename QType>
static inline VTKM_EXEC_CONT vtkm::Float64 RemainderQuotient(vtkm::Float64 numerator,
                                                             vtkm::Float64 denominator,
                                                             QType& quotient)
{
  int iQuotient;
  vtkm::Float64 result = std::remquo(numerator, denominator, &iQuotient);
  quotient = iQuotient;
  return result;
}

/// Gets the integral and fractional parts of \c x. The return value is the
/// fractional part and \c integral is set to the integral part.
///
static inline VTKM_EXEC_CONT vtkm::Float32 ModF(vtkm::Float32 x, vtkm::Float32& integral)
{
  return std::modf(x, &integral);
}
static inline VTKM_EXEC_CONT vtkm::Float64 ModF(vtkm::Float64 x, vtkm::Float64& integral)
{
  return std::modf(x, &integral);
}

//-----------------------------------------------------------------------------
/// Return the absolute value of \p x. That is, return \p x if it is positive or
/// \p -x if it is negative.
///
static inline VTKM_EXEC_CONT vtkm::Int32 Abs(vtkm::Int32 x)
{
#if VTKM_SIZE_INT == 4
  return abs(x);
#else
#error Unknown size of Int32.
#endif
}
static inline VTKM_EXEC_CONT vtkm::Int64 Abs(vtkm::Int64 x)
{
#if VTKM_SIZE_LONG == 8
  return labs(x);
#elif VTKM_SIZE_LONG_LONG == 8
  return llabs(x);
#else
#error Unknown size of Int64.
#endif
}
static inline VTKM_EXEC_CONT vtkm::Float32 Abs(vtkm::Float32 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(fabs)(x);
#else
  return std::fabs(x);
#endif
}
static inline VTKM_EXEC_CONT vtkm::Float64 Abs(vtkm::Float64 x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(fabs)(x);
#else
  return std::fabs(x);
#endif
}
template <typename T>
static inline VTKM_EXEC_CONT typename detail::FloatingPointReturnType<T>::Type Abs(T x)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(fabs)(static_cast<vtkm::Float64>(x));
#else
  return std::fabs(static_cast<vtkm::Float64>(x));
#endif
}
template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<T, N> Abs(const vtkm::Vec<T, N>& x)
{
  vtkm::Vec<T, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::Abs(x[index]);
  }
  return result;
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<T, 4> Abs(const vtkm::Vec<T, 4>& x)
{
  return vtkm::Vec<T, 4>(vtkm::Abs(x[0]), vtkm::Abs(x[1]), vtkm::Abs(x[2]), vtkm::Abs(x[3]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<T, 3> Abs(const vtkm::Vec<T, 3>& x)
{
  return vtkm::Vec<T, 3>(vtkm::Abs(x[0]), vtkm::Abs(x[1]), vtkm::Abs(x[2]));
}
template <typename T>
static inline VTKM_EXEC_CONT vtkm::Vec<T, 2> Abs(const vtkm::Vec<T, 2>& x)
{
  return vtkm::Vec<T, 2>(vtkm::Abs(x[0]), vtkm::Abs(x[1]));
}

/// Returns a nonzero value if \p x is negative.
///
static inline VTKM_EXEC_CONT vtkm::Int32 SignBit(vtkm::Float32 x)
{
#ifndef VTKM_CUDA
  using std::signbit;
#endif
  return static_cast<vtkm::Int32>(signbit(x));
}
static inline VTKM_EXEC_CONT vtkm::Int32 SignBit(vtkm::Float64 x)
{
#ifndef VTKM_CUDA
  using std::signbit;
#endif
  return static_cast<vtkm::Int32>(signbit(x));
}

/// Returns true if \p x is less than zero, false otherwise.
///
static inline VTKM_EXEC_CONT bool IsNegative(vtkm::Float32 x)
{
  return (vtkm::SignBit(x) != 0);
}
static inline VTKM_EXEC_CONT bool IsNegative(vtkm::Float64 x)
{
  return (vtkm::SignBit(x) != 0);
}

/// Copies the sign of \p y onto \p x.  If \p y is positive, returns Abs(\p x).
/// If \p y is negative, returns -Abs(\p x).
///
static inline VTKM_EXEC_CONT vtkm::Float32 CopySign(vtkm::Float32 x, vtkm::Float32 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_32(copysign)(x, y);
#else
  return std::copysign(x, y);
#endif
}
static inline VTKM_EXEC_CONT vtkm::Float64 CopySign(vtkm::Float64 x, vtkm::Float64 y)
{
#ifdef VTKM_CUDA
  return VTKM_CUDA_MATH_FUNCTION_64(copysign)(x, y);
#else
  return std::copysign(x, y);
#endif
}

template <typename T, vtkm::IdComponent N>
static inline VTKM_EXEC_CONT vtkm::Vec<T, N> CopySign(const vtkm::Vec<T, N>& x,
                                                      const vtkm::Vec<T, N>& y)
{
  vtkm::Vec<T, N> result;
  for (vtkm::IdComponent index = 0; index < N; index++)
  {
    result[index] = vtkm::CopySign(x[index], y[index]);
  }
  return result;
}

} // namespace vtkm

#endif //vtk_m_Math_h
