Re: [RFC][PATCH 3/3] math128, x86_64: Implement {mult,add}_u128 in 64bit asm

Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> · Tue, 24 Apr 2012 18:36:35 +0200

On Tue, 2012-04-24 at 09:34 -0700, H. Peter Anvin wrote:
> On 04/24/2012 09:10 AM, Peter Zijlstra wrote:
> 
> Are you sure that gcc won't simply generate this code already if given
> "unsigned __int128"?

It might, but I've been told some GCC versions had issues, also lots of
archs fall back to libgcc functions.

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