Vishwanath wrote: > Hi All, > > I am working on 440GP using Monta Vista Linux 2.1. I need floating point > operation support (for eg. function sqrt() for calculating square root of > given float variable) on Linux. I didn't find math emualtion on the Linux. > Can anyone tell me how can I get floating point support ?
Floating point support in MontaVista Linux is handled by the compiler and _NOT_ the kernel. In architecting our system we have weighed the tradeoffs between soft-floating point, or hard-floating point using kernel exceptions. Soft-floating point was found to be superior so we use it on all platforms without a hardware FPU. One thing to note, because of this the ABI is slightly different then the binaries you would download off of a random community website. You need to use our compiler (or a community compiler configured appropriatly) to build soft-float. (On a non-MontaVista compiler, you usually need to pass -msoft-float on the command line to gcc.) --Mark ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
