float128: use builtin_signbitf128 always
commita49e56a945972186a829ca3ad7dec7fb9c923488
authorPaul E. Murphy <murphyp@linux.vnet.ibm.com>
Tue, 7 Apr 2020 21:20:35 +0000 (7 16:20 -0500)
committerPaul E. Murphy <murphyp@linux.vnet.ibm.com>
Mon, 4 May 2020 18:18:45 +0000 (4 13:18 -0500)
tree3f0d44c70d768803b50655390713ee90457c2ddd
parent06febd8c6705c816b2f32ee7aa1f4c0184b05248
float128: use builtin_signbitf128 always

The minimum GCC version has been raised to 6.2 for building
glibc.  Therefore, follow the advice inside the implementation
and remove the GCC < 6 codepath.

Likewise, remove the hidden_proto as all internal usages should
inline now.
include/math.h
sysdeps/ieee754/float128/s_signbitf128.c