Re: [PATCH v2] Reduce assembly code size of exception entry points

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Wed, Feb 14, 2024 at 10:35:58AM +0000, Frediano Ziglio wrote:
> We just pushed a 8-bytes zero and exception constants are
> small so we can just write a single byte saving 3 bytes for
> instruction.
> With ENDBR64 this reduces the size of many entry points from 32 to
> 16 bytes (due to alignment).
> Similar code is already used in autogen_stubs.

Will using movb instead of movl have any performance impact?  I don't
think we should trade speed for code size, so this needs to be
mentioned in the commit message.

Thanks, Roger.