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From: usenet@mozart.amd.com (Usenet News)
Newsgroups: comp.arch
Subject: Re: RS/6000 renaming
Message-ID: <1990Jul27.061206.19116@mozart.amd.com>
Date: 27 Jul 90 06:12:06 GMT
References: <1990Jul26.160540.15289@mozart.amd.com> <9871@hubcap.clemson.edu>
Organization: Advanced Micro Devices, Inc.
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<1990Jul27.054936.18973@mozart.amd.com>
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Reply-To: davec@nucleus.amd.com (Dave Christie)
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From: davec@nucleus.amd.com (Dave Christie)
Path: nucleus!davec

In <1990Jul27.054936.18973@mozart.amd.com> davec@nucleus.amd.com I write:
>
>One more question, assuming the answer to the previous one is "no":  is
>the mapping file referenced when instructions are placed in the queue,
>or upon issue?  I don't see much point in the former, considering the 
>extra ports required.

Brain damage alert: I've realized the renaming must be done at dispatch
in the ICU to coordinate the renaming of an FPU register by an FXU
instruction.  Yes, the mapping file would obviously have double the 
ports.  Never mind.  
------------------------
Dave Christie             My misconceptions only.