Messages in this thread | | | Date | Wed, 8 Feb 2023 21:45:39 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v3 3/4] x86/alternative: Rewrite optimize_nops() some |
| |
On Wed, Feb 08, 2023 at 09:44:04PM +0100, Peter Zijlstra wrote: > GNU as seems to go to .nops 12. 13 gives me a single byte nop and a 12. > That's also exactly the 3 prefix limit, after which some uarchs start > taking heavy decode penalties.
Oh noes, counting hard. It maxes out at 11, not 12. Sadness.
Instead, lemme go figure out what those alternatives actually are.
| |