Messages in this thread | | | Subject | Re: cmpxchg and x86 flags output | From | "H. Peter Anvin" <> | Date | Fri, 19 Aug 2016 10:22:59 -0700 |
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On 06/22/16 09:14, David Howells wrote: > H. Peter Anvin <hpa@zytor.com> wrote: > >> So how do we make this move forward? > > Getting my API additions in is relatively straightforward, I think. The > whether-or-notness of the cmpxchg operation succeeding can be calculated by > comparing the original value read from memory with the value-to-be-replaced > inside the API function. > > This can later be replaced with the boolean output from the CMPXCHG > instruction, the branch target from the LL/SC skipping or the result of the > intrinsics. >
Hi David,
Any news on this? Can we perhaps help making this go forward at some point?
-hpa
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