log.c: corrected error in ulp calculus

log.dat: add test case to improve coverage


git-svn-id: svn://scm.gforge.inria.fr/svn/mpc/trunk@1214 211d60ee-9f03-0410-a15a-8952a2c7a4e4

1 files changed, 2 insertions, 2 deletions

diff --git a/src/log.c b/src/log.c
index dca924a..ded1f78 100644
--- a/src/log.c
+++ b/src/log.c
@@ -191,8 +191,8 @@ do {                                                            \
 
          mpfr_add (w, w, v, GMP_RNDN);
          if (!mpfr_signbit (w)) /* v is positive, so no cancellation;
-                                 error 11.54... ulp; error counts lost bits */
-            err = 4;
+                                 error 22.25 ulp; error counts lost bits */
+            err = 5;
          else
             err =   MPC_MAX (5 + mpfr_get_exp (v),
                   /* 21.25 ulp (v) rewritten in ulp (result, now in w) */