site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com Dear Darwin developers, 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. 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/site_archiver%40lists.appl... This email sent to site_archiver@lists.apple.com