Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!newstop!sun!amdcad!mozart.amd.com!nucleus!davec
From: davec@nucleus.amd.com (Dave Christie)
Newsgroups: comp.arch
Subject: Re: taxonomy for superscalars/etc (LONG)
Message-ID: <1990Jul23.193341.28214@mozart.amd.com>
Date: 23 Jul 90 19:33:41 GMT
References: <9782@hubcap.clemson.edu> <1990Jul23.182546.25777@mozart.amd.com>
Sender: usenet@mozart.amd.com (Usenet News)
Reply-To: davec@nucleus.amd.com (Dave Christie)
Organization: Advanced Micro Devices, Inc., Austin, Texas
Lines: 18

Just a quick correction before I get flamed:

In article <1990Jul23.182546.25777@mozart.amd.com> I write:
>
>>  IBM S/360 M91 (Tomasulo)    1 / x / r
>>  IBM RS/6000                 s / x / r
>
>These two use renaming in considerably different ways: in the 360/91
>the tags refer to specific physical registers, and not just the floating
>point registers.  In the RS6000, at least from what I can tell from the

Sorry, for the 360/91 the tags refer to specific functional units (the 
reservation stations actually) and the entries in the Floating Point 
Buffers (essentially a load operand queue), i.e. the tags identify all 
the possible sources of operands, *except* for the FP registers.

---------------------------------
Dave Christie            My opinions only.