Hi, On 9/17/07, Ram <[EMAIL PROTECTED]> wrote: > Hi, > > I am trying to write a driver which uses double, float. I am using > an arm11 with gcc 3.4.4 > > When i try to compile my modules (with float variables) i get the error > > WARNING: "__extendsfdf2" undefined! > WARNING: "__mulsf3"undefined! > WARNING: "__fixsfsi"undefined! > WARNING: "__floatsisf"undefined! > > Can we use float, double in kernel modules?. >
in general you shouldn't use floating point in the kernel since there's no portable way which will work among different architectures. > Obviously it is a linking error, I am using soft-float. I tried with > -msoft-float but got the same result. > > I suspect that its a toolchain issue. However i am able to compile > my applications > with float, double variables. > > > Please do advice. > if you need a solution inkernel best would be to try to get around by converting your algorithm to integer. although you might have a look at: http://www.fi.muni.cz/~xslaby/unpr.html http://www.mail-archive.com/linuxppc-embedded%40ozlabs.org/msg01291.html Markus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
