site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com If Itanium2 does x86 floating point arithmetic, keep in mind that x86 operates on 80 bit floats internally, while ppc (afaik) does "only" work with the given 64 bit. So this probably is an architecture issue. You could try and compare this to linux/ppc results (via a ppc/linux live-cd perhaps). If precision is a general problem for you, you might try some software implemented multi-precision floating point numbers, e. g. gmp [1]. By the way GMP 4.2.1 does not compile on itanium2 hp-ux I have :) Tomas -- # Ing. Tomas Zahradnicky, Jr. # The Czech Technical University # Dept of Computer Science, FEE-CTU Prague _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... I believe that this depends on the mathlib implementation. Some mathlibs such as fdlibm calculate results bit by bit and use integers that they obtain by extracting mantissa from double and extending it to 64 bits thus they obtain internal 80bit precision anyway. This email sent to site_archiver@lists.apple.com