diff options
| -rw-r--r-- | libcxx/include/math.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libcxx/include/math.h b/libcxx/include/math.h index 194df2077bb..c9b4733e9c4 100644 --- a/libcxx/include/math.h +++ b/libcxx/include/math.h @@ -510,7 +510,11 @@ _LIBCPP_INLINE_VISIBILITY bool __libcpp_isnan(_A1 __lcpp_x) _NOEXCEPT { +#if __has_builtin(__builtin_isnan) + return __builtin_isnan(__lcpp_x); +#else return isnan(__lcpp_x); +#endif } #undef isnan |
