[Boost-commit] svn:boost r85255 - trunk/boost/multiprecision/detail

Subject: [Boost-commit] svn:boost r85255 - trunk/boost/multiprecision/detail
From: john_at_[hidden]
Date: 2013-08-09 13:44:48

Author: johnmaddock
Date: 2013-08-09 13:44:48 EDT (Fri, 09 Aug 2013)
New Revision: 85255
URL: http://svn.boost.org/trac/boost/changeset/85255

Log:
Fix exact sqrt's.

Text files modified: 
   trunk/boost/multiprecision/detail/default_ops.hpp |     4 ++++                                    
   1 files changed, 4 insertions(+), 0 deletions(-)

Modified: trunk/boost/multiprecision/detail/default_ops.hpp
==============================================================================
--- trunk/boost/multiprecision/detail/default_ops.hpp	Fri Aug  9 12:12:38 2013	(r85254)
+++ trunk/boost/multiprecision/detail/default_ops.hpp	2013-08-09 13:44:48 EDT (Fri, 09 Aug 2013)	(r85255)
@@ -1149,6 +1149,8 @@
    eval_bit_set(t, 2 * g);
    eval_subtract(r, x, t);
    --g;
+   if(eval_get_sign(r) == 0)
+      return;
    int msbr = eval_msb(r);
    do
    {
@@ -1161,6 +1163,8 @@
          {
             eval_bit_set(s, g);
             eval_subtract(r, t);
+            if(eval_get_sign(r) == 0)
+               return;
             msbr = eval_msb(r);
          }
       }