Fix division by denominator with more than two limbs in strtold

diff --git a/ChangeLog b/ChangeLog
index 58f582c..024ee23 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2011-12-21  Andreas Schwab  <schwab@linux-m68k.org>
+
+       [BZ #13524]
+       * stdlib/strtod_l.c (____STRTOF_INTERNAL): Clear lowest limb of
+       numerator after shifting it by one limb.
+
 2011-12-19  Rafael Ávila de Espíndola  <rafael.espindola@gmail.com>
 
        * sysdeps/x86_64/fpu/bits/fenv.h (feraiseexcept): Define it only

diff --git a/NEWS b/NEWS
index a0869ef..50c5852 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,4 @@
-GNU C Library NEWS -- history of user-visible changes.  2011-12-17
+GNU C Library NEWS -- history of user-visible changes.  2011-12-21
 Copyright (C) 1992-2009, 2010, 2011 Free Software Foundation, Inc.
 See the end for copying conditions.
 
@@ -13,7 +13,7 @@ Version 2.15
   12885, 12892, 12907, 12922, 12935, 13007, 13021, 13067, 13068, 13090,
   13092, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13179, 13192,
   13268, 13276, 13291, 13335, 13337, 13344, 13358, 13367, 13446, 13472,
-  13484, 13506
+  13484, 13506, 13524
 
 * New program pldd to list loaded object of a process
   Implemented by Ulrich Drepper.

diff --git a/stdlib/strtod_l.c b/stdlib/strtod_l.c
index b3380fd..f24d4de 100644 (file)
--- a/stdlib/strtod_l.c
+++ b/stdlib/strtod_l.c
@@ -1513,6 +1513,7 @@ ____STRTOF_INTERNAL (nptr, endptr, group, loc)
              assert (numsize == densize);
              for (i = numsize; i > 0; --i)
                num[i] = num[i - 1];
+             num[0] = 0;
            }
 
          den[densize] = 0;
@@ -1557,6 +1558,7 @@ ____STRTOF_INTERNAL (nptr, endptr, group, loc)
              n0 = num[densize] = num[densize - 1];
              for (i = densize - 1; i > 0; --i)
                num[i] = num[i - 1];
+             num[0] = 0;
 
              got_limb;
            }