Bugs item #1246358, was opened at 2005-07-27 14:46 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1246358&group_id=7586 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: interval evaluation bug Initial Comment: evaluation of sin of [0,1] with interval template specification typedef boost::numeric::interval< double, boost::numeric::interval_lib::policies< boost::numeric::interval_lib:: save_state< boost::numeric::interval_lib:: rounded_transc_exact<double, boost::numeric:: interval_lib::rounded_arith_opp<double> > >, boost::numeric::interval_lib:: checking_strict<double> //boost::numeric::interval_lib:: checking_base<double> > > Interval; and rint definition in ms Windows static double inline rint( double x) // Copyright (C) 2001 Tor M. Aamodt, University of Toronto // Permisssion to use for all purposes commercial and otherwise granted. // THIS MATERIAL IS PROVIDED "AS IS" WITHOUT WARRANTY, OR ANY CONDITION OR // OTHER TERM OF ANY KIND INCLUDING, WITHOUT LIMITATION, ANY WARRANTY // OF MERCHANTABILITY, SATISFACTORY QUALITY, OR FITNESS FOR A PARTICULAR // PURPOSE. { if( x > 0 ) { __int64 xint = (__int64) (x+0.5); if( xint % 2 ) { // then we might have an even number... double diff = x - (double)xint; if( diff == -0.5 ) return double(xint-1); } return double(xint); } else { __int64 xint = (__int64) (x-0.5); if( xint % 2 ) { // then we might have an even number... double diff = x - (double)xint; if( diff == 0.5 ) return double(xint+1); } return double(xint); } } gives incorrect result: so sin([0,1]) = [ 0.841471 , -1.60814e-016 ] Thats looks incredible!!! How can i fix it out? ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1246358&group_id=7586 ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ Boost-bugs mailing list Boost-bugs@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs