Messages in this thread | | | Date | Fri, 20 Jul 2012 17:46:41 -0700 (PDT) | Subject | Re: [PATCH] MPILIB: Provide count_leading/trailing_zeros() based on arch functions | From | David Miller <> |
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From: David Howells <dhowells@redhat.com> Date: Fri, 20 Jul 2012 15:21:39 +0100
> Arnd Bergmann <arnd@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.
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