> Is anyone aware of any implementations that use other than 64-bit > floating-point?
As I understand you are asking about Python implementations: sure, the gmpy package supports arbitrary-precision floating point. > I'd be particularly interested in any that use greater > precision than the usual 56-bit mantissa. Nit-pickingly: it's usual that the mantissa is 53-bit. > Do modern 64-bit systems implement anything wider > than the normal double? As Mark said: sure. x86 systems have supported 80-bit "extended" precision for ages. Some architectures have architecture support for 128-bit floats (e.g. Itanium, SPARC v9); it's not clear to me whether they actually implement the long double operations in hardware, or whether they trap and get software-emulated. Regards, Martin _______________________________________________ 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
