From: Jeffrey A Law <law@hurl.cygnus.com>
To: "Jerry Quinn" <jquinn@nortelnetworks.com>
Cc: egcs@egcs.cygnus.com
Subject: Re: Fwd: Questions on PA machine description?
Date: Wed, 31 Mar 1999 23:46:00 -0000 [thread overview]
Message-ID: <26261.921010668@hurl.cygnus.com> (raw)
Message-ID: <19990331234600.6sbo77wl5s24vQplhSMRQu8G1cbFbQjJrNKM48Qof5k@z> (raw)
In-Reply-To: <36E577DF.F825BAFB@americasm01.nt.com>
In message < 36E577DF.F825BAFB@americasm01.nt.com >you write:
> Do you have a pointer to something that describes this better? I've
> been unable to find any info at all on the 7100LC and the 7300 is
> described mainly as a 7100LC core.
Nope. Sorry. I know the non-symmetric nature of the ALUs on the 7100LC
series was discussed in a public forum years ago, but I don't remember
precisely where (MPR would be a good first bet). The scheduling info in
gcc was derived from that public information.
I wouldn't be at all suprised if the 7200 and 7300 were basically 7100LC cores
with different memory latencies.
> I wouldn't mind playing with the machine description some. Also, do you
> have any clue if the 8000 also has this same asymmetric ALU situation?
The 8000 does not suffer from this problem. The ALUs are symmetric. Not
that it matters since from a scheduling standpoint you (mostly) want to
ignore latency and schedule for reorder buffer retirement (2 memops, 2 nonmem
ops per cycle).
jeff
next prev parent reply other threads:[~1999-03-31 23:46 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-03-08 6:49 Jerry Quinn
[not found] ` < 36E3E35A.4BB420BE@americasm01.nt.com >
1999-03-08 20:48 ` Jeffrey A Law
1999-03-09 11:35 ` Jerry Quinn
[not found] ` < 36E577DF.F825BAFB@americasm01.nt.com >
1999-03-09 12:18 ` Jeffrey A Law [this message]
1999-03-16 10:49 ` Jerry Quinn
[not found] ` < 36EEA7B6.D3C894DE@americasm01.nt.com >
1999-03-17 20:12 ` Jeffrey A Law
1999-03-18 14:35 ` Jerry Quinn
[not found] ` < 36F17F8C.9FD937FA@americasm01.nt.com >
1999-03-18 21:00 ` Jeffrey A Law
[not found] ` < 18375.921819620@hurl.cygnus.com >
1999-03-19 17:32 ` Richard Henderson
[not found] ` < 19990319173226.C14722@cygnus.com >
1999-03-20 2:08 ` Jeffrey A Law
[not found] ` < 1843.921916006@upchuck >
1999-03-20 10:43 ` Richard Henderson
1999-03-23 14:13 ` Jerry Quinn
[not found] ` < 36F811ED.32912006@americasm01.nt.com >
1999-03-24 1:30 ` Jeffrey A Law
1999-03-24 14:44 ` Jerry Quinn
[not found] ` < 36F96A7D.F0DBDF47@americasm01.nt.com >
1999-03-25 1:01 ` Jeffrey A Law
[not found] ` < 4324.922351870@upchuck >
1999-03-25 13:56 ` Richard Henderson
1999-03-25 15:10 ` Richard Henderson
1999-03-26 10:50 ` Jerry Quinn
1999-03-26 11:04 ` Richard Henderson
1999-03-31 23:46 ` Richard Henderson
1999-03-31 23:46 ` Jerry Quinn
1999-03-26 14:07 ` Jerry Quinn
1999-03-27 16:04 ` Jeffrey A Law
1999-03-31 23:46 ` Jeffrey A Law
1999-03-31 23:46 ` Jerry Quinn
1999-03-31 23:46 ` Richard Henderson
1999-04-02 11:53 ` Jeffrey A Law
1999-04-05 15:50 ` Jerry Quinn
1999-04-30 23:15 ` Jerry Quinn
1999-04-30 23:15 ` Jeffrey A Law
1999-03-31 23:46 ` Richard Henderson
1999-03-31 23:46 ` Jeffrey A Law
1999-03-31 23:46 ` Jerry Quinn
1999-03-31 23:46 ` Jeffrey A Law
1999-03-31 23:46 ` Jerry Quinn
1999-03-31 23:46 ` Richard Henderson
1999-03-31 23:46 ` Jeffrey A Law
1999-03-31 23:46 ` Richard Henderson
1999-03-31 23:46 ` Jeffrey A Law
1999-03-31 23:46 ` Jerry Quinn
1999-03-31 23:46 ` Jeffrey A Law
1999-03-17 20:14 ` Jeffrey A Law
1999-03-31 23:46 ` Jeffrey A Law
1999-03-31 23:46 ` Jerry Quinn
1999-03-31 23:46 ` Jeffrey A Law
1999-03-31 23:46 ` Jerry Quinn
1999-03-31 23:46 ` Jeffrey A Law
1999-03-31 23:46 ` Jerry Quinn
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