mul.c, mul.dat: bug fix for wrong detection of underflow

git-svn-id: svn://scm.gforge.inria.fr/svn/mpc/trunk@949 211d60ee-9f03-0410-a15a-8952a2c7a4e4

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mul.c b/src/mul.c
index a606fab..6722198 100644
--- a/src/mul.c
+++ b/src/mul.c
@@ -202,7 +202,7 @@ mpfr_fmam (mpfr_ptr z, mpfr_srcptr a, mpfr_srcptr b, mpfr_srcptr c,
    if (mpfr_inf_p (z))
       inex = (mpfr_signbit (z) ? -1 : 1);
 
-   if (mpfr_nan_p (z) || mpfr_zero_p (z)) {
+   if (mpfr_nan_p (z) || (mpfr_zero_p (u) && mpfr_zero_p (v))) {
       /* In the first case, u and v are infinities with opposite signs.
          In the second case, u and v are zeroes. If they have opposite
          signs, the result is zero, but we need to determine its sign.