* mpf/sub.c: Test r!=u before calling mpf_set.

	* mpf/add.c: Ditto, and share mpf_set between usize==0 and vsize==0.

1 files changed, 5 insertions, 3 deletions

diff --git a/mpf/add.c b/mpf/add.c
index fe7049178..b0d88aad5 100644
--- a/mpf/add.c
+++ b/mpf/add.c
@@ -41,13 +41,15 @@ mpf_add (mpf_ptr r, mpf_srcptr u, mpf_srcptr v)
   /* Handle special cases that don't work in generic code below.  */
   if (usize == 0)
     {
-      mpf_set (r, v);
+    set_r_v_maybe:
+      if (r != v)
+        mpf_set (r, v);
       return;
     }
   if (vsize == 0)
     {
-      mpf_set (r, u);
-      return;
+      v = u;
+      goto set_r_v_maybe;
     }
 
   /* If signs of U and V are different, perform subtraction.  */