Sujet : Re: Reverse engineering of Intel branch predictors
De : mitchalsup (at) *nospam* aol.com (MitchAlsup1)
Groupes : comp.archDate : 13. Nov 2024, 01:32:20
Autres entêtes
Organisation : Rocksolid Light
Message-ID : <664f99789a7cf0d81c92c6d637dacc5a@www.novabbs.org>
References : 1 2 3 4 5 6 7 8 9
User-Agent : Rocksolid Light
On Tue, 12 Nov 2024 22:21:37 +0000, Brett wrote:
MitchAlsup1 <mitchalsup@aol.com> wrote:
>
My 1-wide machine fetches 4-words per cycle.
>
A two wide machine only adds a AGU and can do a load and math the same
cycle, so how much bigger is that?
Data path--only forwarding increases.
PARSE and DECODE grow by 2.5×
Register file grows by 25%