Messages in this thread | | | Date | Sun, 23 Jan 2005 04:19:21 +0100 | From | Andi Kleen <> | Subject | Re: [PATCH 1/12] random pt4: Create new rol32/ror32 bitops |
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On Sat, Jan 22, 2005 at 09:10:40PM -0500, Chuck Ebbert wrote: > On Fri, 21 Jan 2005 at 15:41:06 -0600 Matt Mackall wrote: > > > Add rol32 and ror32 bitops to bitops.h > > Can you test this patch on top of yours? I did it on 2.6.10-ac10 but it > should apply OK. Compile tested and booted, but only random.c is using it > in my kernel.
Does random really use variable rotates? For constant rotates gcc detects the usual C idiom and turns it transparently into the right machine instruction.
If that's the case I would use it because it'll avoid some messy code everywhere.
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