Use the GCC builtin functions for the non-inlined signbit implementations.

2015-09-18  Wilco Dijkstra  <wdijkstr@arm.com>

        * sysdeps/ieee754/dbl-64/s_signbit.c (__signbit):
        Use __builtin_signbit.
        * sysdeps/ieee754/flt-32/s_signbitf.c (__signbitf):
        Use __builtin_signbitf.
        * sysdeps/ieee754/ldbl-128/s_signbitl.c (__signbitl):
        Use __builtin_signbitl.
        * sysdeps/ieee754/ldbl-128ibm/s_signbitl.c (___signbitl): Likewise.
        * sysdeps/ieee754/ldbl-96/s_signbitl.c (__signbitl): Likewise.

1 files changed, 1 insertions, 7 deletions

diff --git a/sysdeps/ieee754/ldbl-128ibm/s_signbitl.c b/sysdeps/ieee754/ldbl-128ibm/s_signbitl.c
index e95ad55e32..5e2bd90704 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_signbitl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_signbitl.c
@@ -18,18 +18,12 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <math.h>
-#include <math_private.h>
 #include <math_ldbl_opt.h>
 
 int
 ___signbitl (long double x)
 {
-  int64_t e;
-  double xhi;
-
-  xhi = ldbl_high (x);
-  EXTRACT_WORDS64 (e, xhi);
-  return e < 0;
+  return __builtin_signbitl (x);
 }
 #if IS_IN (libm)
 long_double_symbol (libm, ___signbitl, __signbitl);