llvm/libc/src/__support/FPUtil/NormalFloat.h

//===-- A class to store a normalized floating point number -----*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIBC_SRC___SUPPORT_FPUTIL_NORMALFLOAT_H
#define LLVM_LIBC_SRC___SUPPORT_FPUTIL_NORMALFLOAT_H

#include "FPBits.h"

#include "src/__support/CPP/type_traits.h"
#include "src/__support/common.h"
#include "src/__support/macros/config.h"

#include <stdint.h>

namespace LIBC_NAMESPACE_DECL {
namespace fputil {

// A class which stores the normalized form of a floating point value.
// The special IEEE-754 bits patterns of Zero, infinity and NaNs are
// are not handled by this class.
//
// A normalized floating point number is of this form:
//    (-1)*sign * 2^exponent * <mantissa>
// where <mantissa> is of the form 1.<...>.
template <typename T> struct NormalFloat { … };

#ifdef LIBC_TYPES_LONG_DOUBLE_IS_X86_FLOAT80
template <>
LIBC_INLINE void
NormalFloat<long double>::init_from_bits(FPBits<long double> bits) { … }

operator long double()
#endif // LIBC_TYPES_LONG_DOUBLE_IS_X86_FLOAT80

} // namespace fputil
} // namespace LIBC_NAMESPACE_DECL

#endif // LLVM_LIBC_SRC___SUPPORT_FPUTIL_NORMALFLOAT_H