site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com Hi Tomas- http://lists.apple.com/mailman/listinfo/scitech It's a good group of folks. Hope that helps! -Lance On May 19, 2006, at 6:56 AM, zahradnicky@kppm.cz wrote: Dear Darwin developers, PowerPC-Mac OS X double: 0.44921455671723881 (gdb> print val) Itanium2-HP UX double: 0.44921455671723876 (gdb> print val) Mathematica (PowerPC-double): 0.44921455671723886 649004953142139 (N[val,32]) Mathematica (Pentium4-double): 0.44921455671723875 546774706890574 (N[val,32]) Mathematica (rational evaluation): 0.44921455671723877 615723308414713 (N[val,32]) Itanium2 is obviously closer to the proper result. Should I file a bug against libm? Thanks, Tomas -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ . _______________________________________________ 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/lance%40mac.com _______________________________________________ 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 would suggest you also post this question to Apple's Scitech list (see link below). (a) There are actually Apple scitech library developers on the list who can comment/bugfix/etc and (b) there are a ton of people on the list who develop schtech software for any number of architectures and who could comment precision differences. I've discovered that my program works differently on PowerPC running Mac OS X 10.4.6 and Itanium2 running HP- UX. The problem appears to be in the pow function which gives result that differs by 12 ulps from Itanium2. This email sent to lance@mac.com This email sent to site_archiver@lists.apple.com