From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andreas Jaeger <aj@suse.de>
To: Eli Zaretskii <eliz@is.elta.co.il>
Cc: Jiri Smid <smid@suse.cz>, gdb-patches@sources.redhat.com
Subject: Re: [RFA]: x86_64 target files
Date: Thu, 02 Aug 2001 09:37:00 -0000
Message-id: <u84rrqa0ap.fsf@gromit.moeb>
References: <Pine.SUN.3.91.1010802183244.3639C-100000@is>
X-SW-Source: 2001-08/msg00036.html

Eli Zaretskii <eliz@is.elta.co.il> writes:

> On 2 Aug 2001, Jiri Smid wrote:
> 
>> This is the related new files for x86-64 target.

Thanks!

> What is x86-64, exactly?  Some of the files seem to hint that it's an AMD 
> CPU, but others just say x86-64.

x86-64 is AMD's 64 bit architecture which is an 64-bit enhancement to
the ia32 (ix86) architecture.  The step from 32-bit to 64-bit has been
done in a similar way as done by MIPS and SPARC for their CPUs.

In a nutshell:
x86-64 has 16 (instead of 8 for ia32) normal registers that hold
64-bit, 16 XMM (instead of 8 for ia32) registers used by SSE/SSE2 and
the x87 FPU.

For more details check http://www.x86-64.org - or ask me,
Andreas
-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.inka.de
    http://www.suse.de/~aj