[PATCH] [X86] Add Jcc branch hint (2E, 3E) MC support.
joerg at britannica.bec.de
Tue Jun 23 12:21:08 PDT 2015
On Tue, Jun 23, 2015 at 06:37:56PM +0000, Ahmed Bougacha wrote:
> Also, I'm not sure these have had any effect (but larger instructions)
> since Pentium 4, but we still need to assemble/disassemble them.
Actually, the situation is worse. If I remember correctly, it is more
like Pentium 4 or so is the *only* generation that actually uses them as
branch hints and it is explicitly recommendated to avoid for many other
cores. As such, unless there is a really good reason for having this, I
would strongly consider leaving them out...
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