site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com <http://developer.apple.com/documentation/Darwin/Conceptual/KernelProgramming/style/chapter_5_section_5.html> <http://developer.apple.com/documentation/Darwin/Conceptual/KernelProgramming/style/chapter_5_section_4.html> S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Technical Support * Networking, Communications, Hardware _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... At 21:56 -0800 6/3/06, Mike Smith wrote: Floating point math is not generally supported in the kernel; you'll need to find another way of doing what you need to do. Just to clarify this, we /do/ support the use of floating point (and vector) instructions in kernel code. For example, the Mac OS X audio sub-system makes extensive use of floating point in the kernel. However, there are caveats. This topic is covered pretty well in the documentation. The problem you're seeing is not related to floating point instructions, per se, but to floating point libraries. The availability, in kernel, of commonly used library functions is also covered in the documentation. Unfortunately, standard floating point library functions, like pow and acos, are not present in the kernel. In this respect, the difference between Xcode 1.5 and Xcode 2.2 is an improvement; there's no point allowing you to include <math.h> if the functions aren't available anyway. You will have to eliminate your dependency on these functions. I'm not a Maths Geek (tm), but there's got to be a way... This email sent to site_archiver@lists.apple.com