On Mon, Oct 24, 2011 at 04:58:49PM +0100, Jonathan Cameron wrote: > On 10/24/11 16:39, Guenter Roeck wrote: > > Is div_s64 really necessary, or would > > > > result = (long)val * (long)scaleint + > > DIV_ROUND_CLOSEST((s64)val * (s64)scalepart, > > 1000000000LL); > > > > work as well ? > Not if you want it to compile on arm v5 by the look of it. > > ERROR: "__aeabi_ldivmod" [drivers/staging/iio/iio_hwmon.ko] undefined! You know, div64 is there to deal with the case of _sanely_ dividing a 64-bit number by a 32-bit number - there should be absolutely no question about _not_ using it if that's the operation you are wanting to perform. Expecting gcc to do a better job without using div64 is just asking for bad code on 32-bit platforms. -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
