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SubjectRe: [PATCH] udivdi3: 64 bit divide
On Tue, 27 Feb 2007 12:24:37 -0800
Andrew Morton <akpm@linux-foundation.org> wrote:

> > On Mon, 26 Feb 2007 17:35:17 -0800 Stephen Hemminger <shemminger@linux-foundation.org> wrote:
> > The kernel already has several implmentations and usages of 64 by 64
> > bit divide.
> >
> > Although it is significantly slower, there are places that need it so
> > provide one generic version using scaling, and allow existing platform
> > versions to continue.
>
> The reason we implement 64/32 via do_div() is, for better or for worse, to
> make people think before they use it. And to make it stand out, and so
> that we discover places that are using it by accident, where they could use
> something cheaper.
>
> However your implementation of the presumably even more expensive 64/64
> allows us to do 64/64 with a plain old "/" operator.
>
> If the do_div() philosophy is any good then we should surely repeat it for
> 64/64, no?
>

Then we should pull the existing udivdi3 implementations?
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