type_float.hpp
#pragma once
#include "setup.hpp"
#if GLM_COMPILER == GLM_COMPILER_VC12
# pragma warning(push)
# pragma warning(disable: 4512) // assignment operator could not be generated
#endif
namespace glm{
namespace detail
{
template <typename T>
union float_t
{};
// https://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/
template <>
union float_t<float>
{
typedef int int_type;
typedef float float_type;
GLM_CONSTEXPR float_t(float_type Num = 0.0f) : f(Num) {}
GLM_CONSTEXPR float_t& operator=(float_t const& x)
{
f = x.f;
return *this;
}
// Portable extraction of components.
GLM_CONSTEXPR bool negative() const { return i < 0; }
GLM_CONSTEXPR int_type mantissa() const { return i & ((1 << 23) - 1); }
GLM_CONSTEXPR int_type exponent() const { return (i >> 23) & ((1 << 8) - 1); }
int_type i;
float_type f;
};
template <>
union float_t<double>
{
typedef detail::int64 int_type;
typedef double float_type;
GLM_CONSTEXPR float_t(float_type Num = static_cast<float_type>(0)) : f(Num) {}
GLM_CONSTEXPR float_t& operator=(float_t const& x)
{
f = x.f;
return *this;
}
// Portable extraction of components.
GLM_CONSTEXPR bool negative() const { return i < 0; }
GLM_CONSTEXPR int_type mantissa() const { return i & ((int_type(1) << 52) - 1); }
GLM_CONSTEXPR int_type exponent() const { return (i >> 52) & ((int_type(1) << 11) - 1); }
int_type i;
float_type f;
};
}//namespace detail
}//namespace glm
#if GLM_COMPILER == GLM_COMPILER_VC12
# pragma warning(pop)
#endif
glm::int64
detail::int64 int64
64 bit signed integer type.
Definition: scalar_int_sized.hpp:67
glm
Definition: common.hpp:20