On 20/12/13 10:20, Chen Gang wrote: > Hmm... but do you know why we need some 64-bit functions which are > implemented under "arch/metag/lib/*.S"? can we use <linux/math64.h> > instead of them? (e.g 64-bit '/').
If you look at linux/math64.h you'll see it only implements division operations. The other 64 bit operations like shift, compare, and multiply are relatively cheap so are implemented as intrinsics instead. Cheers James -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
