[newlib-cygwin] finitel: Use correct GCC builtin

[newlib-cygwin] finitel: Use correct GCC builtin

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=373f81d17c2ab1ab9a7b37c26c1ed067174a42e5

commit 373f81d17c2ab1ab9a7b37c26c1ed067174a42e5
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Sat Mar 26 20:29:20 2016 +0100

    finitel: Use correct GCC builtin
    
    __builtin_isinf_sign doesn't reflect the correct return value for NaN
    to emulate finite function.  Use __builtin_isfinite instead whichg is available
    since GCC 4.4 just as __builtin_isinf_sign.
    
    	* libm/common/sl_finite.c (finitel): Use __builtin_isfinite.
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 newlib/libm/common/sl_finite.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/newlib/libm/common/sl_finite.c b/newlib/libm/common/sl_finite.c
index 0c27b4f..9ec6290 100644
--- a/newlib/libm/common/sl_finite.c
+++ b/newlib/libm/common/sl_finite.c
@@ -19,7 +19,7 @@ finitel (long double x)
      Some architectures for example have an 80-bit long double whereas
      others use 128-bits.  We use macros and comiler builtin functions
      to avoid specific knowledge of the long double format.  */
-  return __builtin_isinf_sign (x) == 0;
+  return __builtin_isfinite (x);
 #endif
 }