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, 6 deletions

diff --git a/sysdeps/ieee754/dbl-64/s_signbit.c b/sysdeps/ieee754/dbl-64/s_signbit.c
index 764f11a2d2..91797eecdd 100644
--- a/sysdeps/ieee754/dbl-64/s_signbit.c
+++ b/sysdeps/ieee754/dbl-64/s_signbit.c
@@ -19,13 +19,8 @@
 
 #include <math.h>
 
-#include <math_private.h>
-
 int
 __signbit (double x)
 {
-  int32_t hx;
-
-  GET_HIGH_WORD (hx, x);
-  return hx & 0x80000000;
+  return __builtin_signbit (x);
 }