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Message-ID: <2187.84.188.252.232.1146172863.squirrel@www.jpberlin.de>
Date: Thu, 27 Apr 2006 23:21:03 +0200 (CEST)
From: sebastian.rother@...erlin.de
To: john-users@...ts.openwall.com
Subject: Re: Performance tuning
> Sebastian,
>
> You're so religious (this time as it relates to AMD vs. Intel) that
> you've missed my point. ;-)
I and religions...? Never ;-D
But did you ever asked AMD to support more SSE registers? :)
As far as I can see: AMD exspands the SSE registers in 64Bit Mode.
To make a long storry short:
In fact wich stuff from the SSE-Engines do you need?
As far as I can see SSE is 128Bit (not 2x64 like on P4) and it has 16
registers (official Docs, also mentioned in Wikipedia (german version of
the article)).
64Bit registers are:
RAX,RBX,RCX,RDX,RBP,RSI,RDI,RSP
64Bit Media- Floatingpointregisters:
MMX0/FPR0 ... MMX7/FPR7 8 MMX Registers
128bit Mediaregisters
XMM0 ... XMM15 16 SSE Registers
Other registers with 64Bit:
RFLAGS, RIP
So how can 8 64Bit registers outperform 16 128Bit Registers?!
Related to the Co-Processors:
News:
http://www.reed-electronics.com/electronicnews/article/CA6327446.html?industryid=22113
Company:
http://www.drccomputer.com/pages/modules.html
Kind regards,
Sebastian
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