1//===-- Implementation header for isnanl ------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLVM_LIBC_SRC___SUPPORT_MATH_ISNANL_H
10#define LLVM_LIBC_SRC___SUPPORT_MATH_ISNANL_H
11
12#include "src/__support/FPUtil/FPBits.h"
13#include "src/__support/macros/config.h"
14
15namespace LIBC_NAMESPACE_DECL {
16namespace math {
17
18#undef isnanl
19LIBC_INLINE LIBC_CONSTEXPR int isnanl(long double x) {
20#if defined(__LIBC_USE_BUILTIN_ISNAN) && !defined(LIBC_USE_CONSTEXPR)
21 return __builtin_isnan(x);
22#else
23 return fputil::FPBits<long double>(x).is_nan();
24#endif
25}
26
27} // namespace math
28} // namespace LIBC_NAMESPACE_DECL
29
30#endif // LLVM_LIBC_SRC___SUPPORT_MATH_ISNANL_H
31