//	Distributed under the Boost Software License Version 1.0 https://www.boost.org/LICENSE_1_0.txt
//	Copyright Gero Peterhoff

#ifndef BOOST_MATH_CCMATH_BITS_HPP
#define BOOST_MATH_CCMATH_BITS_HPP

#include <cstdint>
#include <boost/config.hpp>
#include <boost/math/special_functions/detail/fp_traits.hpp>

#if !defined(BOOST_NO_CXX20_HDR_BIT)
	#include <bit>
	#if (__cpp_lib_bit_cast >= 201806L)
		#define BOOST_MATH_BIT_CAST(T, x) std::bit_cast<T>(x)
	#endif
#elif defined(__has_include)
	#if __has_include(<bit>)
		#include <bit>
		#if (__cpp_lib_bit_cast >= 201806L)
			#define BOOST_MATH_BIT_CAST(T, x) std::bit_cast<T>(x)
		#endif
	#endif
#elif defined(__has_builtin)
	#if __has_builtin(__builtin_bit_cast)
		#define BOOST_MATH_BIT_CAST(T, x) __builtin_bit_cast(T, x)
	#endif
#endif



namespace boost
{
namespace math
{
namespace ccmath
{
namespace detail
{
#pragma pack(push, 1)

struct float128_bits
{
#if BOOST_MATH_ENDIAN_LITTLE_BYTE
	std::uint64_t mantissa_l: 64;
	std::uint64_t mantissa_h: 48;
	std::uint64_t exponent	: 15;
	std::uint64_t sign		: 1;
#else // big endian
	std::uint64_t sign		: 1;
	std::uint64_t exponent	: 15;
	std::uint64_t mantissa_h: 48;
	std::uint64_t mantissa_l: 64;
#endif
};

struct float80_bits_128
{
#if BOOST_MATH_ENDIAN_LITTLE_BYTE
	std::uint64_t mantissa	: 64;
	std::uint64_t exponent	: 15;
	std::uint64_t sign		: 1;
	std::uint64_t padding	: 48;
#else // big endian
	std::uint64_t padding	: 48;
	std::uint64_t sign		: 1;
	std::uint64_t exponent	: 15;
	std::uint64_t mantissa	: 64;
#endif
};

struct float80_bits_96
{
#if BOOST_MATH_ENDIAN_LITTLE_BYTE
	std::uint64_t mantissa	: 64;
	std::uint32_t exponent	: 15;
	std::uint32_t sign		: 1;
	std::uint32_t padding	: 16;
#else // big endian
	std::uint32_t padding	: 16;
	std::uint32_t sign		: 1;
	std::uint32_t exponent	: 15;
	std::uint64_t mantissa	: 64;
#endif
};

struct float80_bits_80
{
#if BOOST_MATH_ENDIAN_LITTLE_BYTE
	std::uint64_t mantissa	: 64;
	std::uint16_t exponent	: 15;
	std::uint16_t sign		: 1;
#else // big endian
	std::uint16_t sign		: 1;
	std::uint16_t exponent	: 15;
	std::uint64_t mantissa	: 64;
#endif
};

struct float64_bits
{
#if BOOST_MATH_ENDIAN_LITTLE_BYTE
	std::uint64_t mantissa	: 52;
	std::uint64_t exponent	: 11;
	std::uint64_t sign		: 1;
#else // big endian
	std::uint64_t sign		: 1;
	std::uint64_t exponent	: 11;
	std::uint64_t mantissa	: 52;
#endif
};

struct float32_bits
{
#if BOOST_MATH_ENDIAN_LITTLE_BYTE
	std::uint32_t mantissa	: 23;
	std::uint32_t exponent	: 8;
	std::uint32_t sign		: 1;
#else // big endian
	std::uint32_t sign		: 1;
	std::uint32_t exponent	: 8;
	std::uint32_t mantissa	: 23;
#endif
};

struct float16_bits
{
#if BOOST_MATH_ENDIAN_LITTLE_BYTE
	std::uint16_t mantissa	: 10;
	std::uint16_t exponent	: 5;
	std::uint16_t sign		: 1;
#else // big endian
    std::uint16_t sign		: 1;
    std::uint16_t exponent	: 5;
    std::uint16_t mantissa	: 10;
#endif
};

struct bfloat16_bits
{
#if BOOST_MATH_ENDIAN_LITTLE_BYTE
	std::uint16_t mantissa	: 7;
	std::uint16_t exponent	: 8;
	std::uint16_t sign		: 1;
#else // big endian
	std::uint16_t sign		: 1;
	std::uint16_t exponent	: 8;
	std::uint16_t mantissa	: 7;
#endif
};

#pragma pack(pop)
}	//	detail
}	//	ccmath
}	//	math
}	//	boost

#endif	//	BOOST_MATH_CCMATH_BITS_HPP