Re: [RFC][PATCH 0/3] gcc work-around and math128

[Linus Torvalds]

On Tue, Apr 24, 2012 at 2:15 PM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote:
>
> I played with some of this stuff awhile ago, and for timekeeping, it
> seemed like a 64x32->96 bit multiply followed by a right shift was
> enough, and that operation is a lot faster on 32-bit architectures than
> a full 64x64->128 multiply.

Ack. That may sound like odd numbers, but 64x32->96 sounds sane. And I
think it avoids a multiply even on 64-bit, no?

              Linus
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