Greetings! These rounding errors were fixed in the latest stable gcl source, which is post lenny. Debian testing has synchronous gcl/maxima/acl2/axiom/hol88 without errors (on about 12 different platforms).
cvs -z9 -q -d:pserver:anonym...@cvs.sv.gnu.org co -d gcl-2.6.8pre -r Version_2_6_8pre gcl cd gcl-2.6.8pre && ./configure --enable-ansi && make Take care, Paulo Gomes <pvdgo...@gmail.com> writes: > Hello, > > I have just succesfully built maxima 5.21.1 from source with gcl in > Debian 5.0 lenny. > I ran the test suite and all tests completed with 'Which was correct', > except these two: > > Running tests in rtest16: > ********************** Problem 180 *************** > Input: > float((2^60-1)/2^60)-1 > Result: > -1.1102230246251565*10^-16 > This differed from the expected result: > 0.0 > ********************** Problem 181 *************** > Input: > float((2^1000-1)/2^1000)-1 > Result: > -1.1102230246251565*10^-16 > This differed from the expected result: > 0.0 > 373/375 tests passed > The following 2 problems failed: (180 181) > Error summary: > Errors found in /usr/share/maxima/5.21.1/tests/rtest16.mac, problems: > (180 181) > 2 tests failed out of 375 total tests. > > > According to the comment in the testsuite code, this is meant to test > for a known bug: > /* > * Bug [ 2688847 ] float of rats rounds incorrectly > */ > float((2^60-1)/2^60)-1; > 0.0; > float((2^1000-1)/2^1000)-1; > 0.0; > > > However, the sourceforge maxima bug tracker > > http://sourceforge.net/tracker/index.php?func=detail&aid=2688847&group_id=4933&atid=104933 > > states that this bug is fixed and closed. > > Do any of you have an explanation (or have found the same)? > > Thank you, > > Paulo Gomes > > > _______________________________________________ > Maxima mailing list > max...@math.utexas.edu > http://www.math.utexas.edu/mailman/listinfo/maxima > > > > -- Camm Maguire c...@maguirefamily.org ========================================================================== "The earth is but one country, and mankind its citizens." -- Baha'u'llah _______________________________________________ Gcl-devel mailing list Gcl-devel@gnu.org http://lists.gnu.org/mailman/listinfo/gcl-devel
