Mark Dickinson <dicki...@gmail.com> added the comment: > Python 3.1.2 -- 32 bit gives sin(2^60) = -0.7391806966492228
Interesting. I get >>> sin(2.**60) -0.83064921763725463 On both OS X 10.6.3 (64-bit build) and OS X 10.5.something (32-bit build). But this is all down to the platform math library, of course. I agree it's not ideal, but it's not really in Python's power to fix this, without adding a huge extra maintenance burden (from adding the necessary high-precision arithmetic to Python itself) or another external dependency. You could always try to come up with a patch that adds a configure option for linking Python's math library into MPFR instead of the system math library. (crlibm would also work, and would be faster; it doesn't seem to be so well maintained these days though; Pari/GP isn't such a great option since its floating-point model isn't so compatible with IEEE 754). ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue8309> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
