From: Ralf Baechle <ralf@linux-mips.org>
To: Thiemo Seufer <ica2_ts@csv.ica.uni-stuttgart.de>
Cc: Dominic Sweetman <dom@algor.co.uk>,
"Maciej W. Rozycki" <macro@ds2.pg.gda.pl>,
Carsten Langgaard <carstenl@mips.com>,
"Kevin D. Kissell" <kevink@mips.com>,
linux-mips@linux-mips.org
Subject: Re: Latest sources from CVS.
Date: Sat, 7 Dec 2002 01:00:28 +0100 [thread overview]
Message-ID: <20021207010028.A13543@linux-mips.org> (raw)
In-Reply-To: <20021206233337.GM23743@rembrandt.csv.ica.uni-stuttgart.de>; from ica2_ts@csv.ica.uni-stuttgart.de on Sat, Dec 07, 2002 at 12:33:37AM +0100
On Sat, Dec 07, 2002 at 12:33:37AM +0100, Thiemo Seufer wrote:
> > I'd worry less if that was just 220kB of unused memory wasted. But it's
> > actually inflated code, it's wasted i-cache and cycles. 220kB translates
> > to alost 7 times the size of today's typical 32kB i-cache.
> >
> > Even if Thiemo was right this trick is probably the biggest micro-
> > optimization of the decade ...
>
> Even if it was such a big win it would IMHO be better to use N64 and
> teach the assembler some optimization for such register loads.
> -Wa,--sign-extend-immediates shouldn't be that complicated to implement.
The entire situation will change anyway once gcc no longer emits macro
instructions such as la or dla.
Ralf
prev parent reply other threads:[~2002-12-07 0:00 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-04 8:34 Latest sources from CVS Carsten Langgaard
2002-12-04 9:09 ` Kevin D. Kissell
2002-12-04 9:09 ` Kevin D. Kissell
2002-12-04 13:04 ` Ralf Baechle
2002-12-05 3:34 ` Ralf Baechle
2002-12-05 11:14 ` Carsten Langgaard
2002-12-05 13:47 ` Maciej W. Rozycki
2002-12-05 14:12 ` Carsten Langgaard
2002-12-05 14:27 ` Ralf Baechle
2002-12-06 12:52 ` Carsten Langgaard
2002-12-06 13:07 ` Ralf Baechle
2002-12-06 13:24 ` Carsten Langgaard
2002-12-06 13:24 ` Thiemo Seufer
2002-12-06 13:34 ` Thiemo Seufer
2002-12-06 13:41 ` Carsten Langgaard
2002-12-06 13:51 ` Thiemo Seufer
2002-12-06 16:32 ` Maciej W. Rozycki
2002-12-06 16:45 ` Thiemo Seufer
2002-12-06 17:01 ` Maciej W. Rozycki
2002-12-06 17:24 ` Thiemo Seufer
2002-12-06 18:04 ` Ralf Baechle
2002-12-06 18:30 ` Maciej W. Rozycki
2002-12-06 18:41 ` Thiemo Seufer
2002-12-06 18:58 ` Maciej W. Rozycki
2002-12-06 17:02 ` Ralf Baechle
2002-12-06 17:15 ` Thiemo Seufer
2002-12-06 17:34 ` Greg Lindahl
2002-12-06 18:18 ` Dominic Sweetman
2002-12-06 18:40 ` Greg Lindahl
2002-12-06 23:17 ` Ralf Baechle
2002-12-06 23:33 ` Thiemo Seufer
2002-12-07 0:00 ` Ralf Baechle [this message]
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