Use __builtin_signbit directly instead of std::signbit.
libstdc++-v3/ChangeLog:
* include/std/complex (arg(T)): Use __builtin_signbit instead of
std::signbit.
---
This would avoid overload resolution for std::signbit, and avoid a
function call for -O0, but I'm not sure it's worth bothering.
Tested x86_64-linux.
libstdc++-v3/include/std/complex | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libstdc++-v3/include/std/complex b/libstdc++-v3/include/std/complex
index 67f37d4ec2b7..d9d2d8afda89 100644
--- a/libstdc++-v3/include/std/complex
+++ b/libstdc++-v3/include/std/complex
@@ -2532,8 +2532,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
#if (_GLIBCXX11_USE_C99_MATH && !_GLIBCXX_USE_C99_FP_MACROS_DYNAMIC)
- return std::signbit(__x) ? __type(3.1415926535897932384626433832795029L)
- : __type();
+ return __builtin_signbit(__type(__x))
+ ? __type(3.1415926535897932384626433832795029L) : __type();
#else
return std::arg(std::complex<__type>(__x));
#endif
--
2.49.0
