Mercurial > hg > octave-kai > gnulib-hg
diff lib/math.in.h @ 9645:c8174371956e
Exploit the __builtin_signbit GCC built-in.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Sat, 26 Jan 2008 02:26:52 +0100 |
| parents | 4a3319c82e39 |
| children | 7f3ed6b093be |
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--- a/lib/math.in.h +++ b/lib/math.in.h @@ -353,6 +353,14 @@ #if @GNULIB_SIGNBIT@ +# if @REPLACE_SIGNBIT_USING_GCC@ +# undef signbit + /* GCC 4.0 and newer provides three built-ins for signbit. */ +# define signbit(x) \ + (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \ + sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \ + __builtin_signbitf (x)) +# endif # if @REPLACE_SIGNBIT@ # undef signbit extern int gl_signbitf (float arg);