| Date | Tue, 24 Apr 2012 10:27:22 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [RFC][PATCH 0/3] gcc work-around and math128 |
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On 04/24/2012 10:22 AM, H. Peter Anvin wrote: > On 04/24/2012 09:10 AM, Peter Zijlstra wrote: >> >> So far its just mult, add and cmp for u128, no divisions quite yet. I realize >> that on 32bit archs mult_u128 will result in like 8 multiplication >> instructions that's still nowhere near the most expensive thing ever. >> > > Please add shifts, at the very least. >
Oh, and a constant constructor.
-hpa
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