Optimize mpfr_prec_round.

Optimize mpfr_set (Case of both src & dest have the same precision).
Start optimizing mpfr_sub1.


git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@2535 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 2 insertions, 1 deletions

diff --git a/cmp2.c b/cmp2.c
index a64cd35ed..4b260feff 100644
--- a/cmp2.c
+++ b/cmp2.c
@@ -47,9 +47,10 @@ mpfr_cmp2 (mpfr_srcptr b, mpfr_srcptr c, mp_prec_t *cancel)
   MPFR_ASSERTD(MPFR_IS_FP(c));
 
   /* Optimized case x - x */
-  if (b == c)
+  if (MPFR_UNLIKELY(b == c))
     return 0;
 
+  /*FIXME: Useless for sub1 ? */
   if (MPFR_IS_ZERO(b))
     {
       if (MPFR_IS_ZERO(c))