Re: [PATCH] MPILIB: Provide count_leading/trailing_zeros() basedon arch functions

[David Miller]

From: David Howells <dhowells@xxxxxxxxxx>
Date: Fri, 20 Jul 2012 15:21:39 +0100

> Arnd Bergmann <arnd@xxxxxxxx> 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.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/