llvm/libc/src/__support/FPUtil/generic/sqrt_80_bit_long_double.h

//===-- Square root of x86 long double numbers ------------------*- 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_GENERIC_SQRT_80_BIT_LONG_DOUBLE_H
#define LLVM_LIBC_SRC___SUPPORT_FPUTIL_GENERIC_SQRT_80_BIT_LONG_DOUBLE_H

#include "src/__support/CPP/bit.h"
#include "src/__support/FPUtil/FEnvImpl.h"
#include "src/__support/FPUtil/FPBits.h"
#include "src/__support/FPUtil/rounding_mode.h"
#include "src/__support/common.h"
#include "src/__support/macros/config.h"
#include "src/__support/uint128.h"

namespace LIBC_NAMESPACE_DECL {
namespace fputil {
namespace x86 {

LIBC_INLINE void normalize(int &exponent, UInt128 &mantissa) { … }

// if constexpr statement in sqrt.h still requires x86::sqrt to be declared
// even when it's not used.
LIBC_INLINE long double sqrt(long double x);

// Correctly rounded SQRT for all rounding modes.
// Shift-and-add algorithm.
#if defined(LIBC_TYPES_LONG_DOUBLE_IS_X86_FLOAT80)
LIBC_INLINE long double sqrt(long double x) { … }
#endif // LIBC_TYPES_LONG_DOUBLE_IS_X86_FLOAT80

} // namespace x86
} // namespace fputil
} // namespace LIBC_NAMESPACE_DECL

#endif // LLVM_LIBC_SRC___SUPPORT_FPUTIL_GENERIC_SQRT_80_BIT_LONG_DOUBLE_H