On Saturday 2012-07-21 02:46, David Miller wrote: >> Arnd Bergmann <a...@arndb.de> wrote: >> >>> I don't generally like to put stuff into asm-generic when it's unlikely >>> to be overridden by architectures. It would really belong into >>> include/linux, but then again we have all the other bitops in asm-generic >>> as well, so whatever... >> >> Some arches (such as Sparc, I think) have count-leading-zero instructions. > >Yes, newer sparc64 chips have leading-zero-detect, and I was pretty >sure that powerpc had something similar. It's called count-leading- >zeros or something like that.
And gcc has a __builtin_clz. -- 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/
