On Feb 1, 2008 6:31 PM, Neal Norwitz <[EMAIL PROTECTED]> wrote: > On Feb 1, 2008 2:52 PM, Mark Dickinson <[EMAIL PROTECTED]> wrote: > > The IBM format is particularly troublesome because > > it's base 16 instead of base 2 (so e.g. multiplying a float by 2 can lose > > bits), but it appears that recent IBM machines do both IBM format and IEEE > > format floating-point. I assume that the S-390 buildbots are using the IEEE > > side---is this true? > > I don't know and suspect the only way to figure it out would be to > write a test that would expose which is being used. It's using gcc, > so we probably get whatever the compiler defaults to. Sometimes we > have to specify flags for certain platforms. For example -mieee on > the Alpha. > > It's fine to check in something so that you can get an answer on a buildbot.
Actually, an even better way to do this would be to craft a test case that exposes the assumptions you've found about the floating format. Then it'll be a valuable regression test even after someone fixes the bug. -- Namasté, Jeffrey Yasskin _______________________________________________ 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
