Use of MPFR_UNLIKELY and MPFR_IS_SINGULAR for fast detection of special values (Nan, Inf or Zero).

Start to encapsulate the sign to be independant of the reprensation (Must be 1 or -1).


git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@2525 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 3 insertions, 3 deletions

diff --git a/frac.c b/frac.c
index fd4e99a7f..45833ecbe 100644
--- a/frac.c
+++ b/frac.c
@@ -36,13 +36,13 @@ mpfr_frac (mpfr_ptr r, mpfr_srcptr u, mp_rnd_t rnd_mode)
   mpfr_t tmp;
   mpfr_ptr t;
 
-  if (MPFR_IS_NAN(u))
+  /* Special cases */
+  if (MPFR_UNLIKELY(MPFR_IS_NAN(u)))
     {
       MPFR_SET_NAN(r);
       MPFR_RET_NAN;
     }
-
-  if (MPFR_IS_INF(u) || mpfr_integer_p (u))
+  else if (MPFR_UNLIKELY(MPFR_IS_INF(u) || mpfr_integer_p (u)))
     {
       MPFR_CLEAR_FLAGS(r);
       MPFR_SET_SAME_SIGN(r, u);