On Tue, Dec 9, 2008 at 5:24 PM, Mark Dickinson <[EMAIL PROTECTED]> wrote: > I don't know of any. There are certainly places in the codebase that > assume 56 bits are enough. (I seem to recall it's something like > 56 bits for IBM, 53 bits for IEEE 754, 48 for Cray, and 52 or 56 for VAX.)
Quick correction, after actually bothering to look things up rather than relying on my poor memory: VAX doubles have either *53* (not 52) or 56 bit mantissas. More precisely, the VAX G_floating format has a 53-bit mantissa (52 bits stored directly, one implicit 'hidden' bit), while the (now rare) D_floating format has a 56-bit mantissa (again, including the implicit 'hidden' bit). Mark _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
