ieee_754_float.hpp

// SPDX-License-Identifier: MIT
#ifndef LIBSBX_MATH_IEEE_754_FLOAT_HPP_
#define LIBSBX_MATH_IEEE_754_FLOAT_HPP_
 
#include <cmath>
#include <cstdint>
#include <bit>
 
namespace sbx::math {
 
union ieee_754_float32 {
 
  inline static constexpr auto bias = std::uint32_t{127};
 
  std::float_t f;
  std::uint32_t i;
#if std::endian::native == std::endian::little
  struct {
    std::uint32_t mantissa: 23;
    std::uint32_t exponent: 8;
    std::uint32_t sign: 1;
  };
#else
  struct {
    std::uint32_t sign: 1;
    std::uint32_t exponent: 8;
    std::uint32_t mantissa: 23;
  };
#endif
  
}; // ieee_754_float32
 
union ieee_754_float64 {
 
  inline static constexpr auto bias = std::uint32_t{1023};
 
  std::double_t f;
  std::uint64_t i;
#if std::endian::native == std::endian::little
  struct {
    std::uint64_t mantissa: 23;
    std::uint64_t exponent: 8;
    std::uint64_t sign: 1;
  };
#else
  struct {
    std::uint64_t sign: 1;
    std::uint64_t exponent: 8;
    std::uint64_t mantissa: 23;
  };
#endif
  
}; // ieee_754_float64
 
} // namespace sbx::math
 
#endif // LIBSBX_MATH_IEEE_754_FLOAT_HPP_