From: Joern Rennecke <amylaar@cygnus.co.uk>
To: law@cygnus.com
Cc: ak@muc.de, egcs@cygnus.com
Subject: Re: Feature request: ability to describe x86 register halves as contraints.
Date: Tue, 30 Jun 1998 11:53:00 -0000 [thread overview]
Message-ID: <199806301655.RAA04324@phal.cygnus.co.uk> (raw)
In-Reply-To: <15971.899192800@hurl.cygnus.com>
> > Is it possible to add such an extension to the constraints language?
> > Hopefully only minimal changes should be needed for this.
> First there'd have to be a way to describe hi/lo halves of registers
> in RTL. I'm not aware of any such mechanism.
I think we should change SUBREG to count addressable units instead of
'words'. This would also fix some brokenness when there are
varying register sizes (E.g. floating point wider than integer...)
next prev parent reply other threads:[~1998-06-30 11:53 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-06-29 20:41 ak
1998-06-30 0:42 ` Richard Henderson
1998-06-30 4:50 ` ak
1998-06-30 19:49 ` Alan Modra
1998-06-30 19:49 ` Andreas Kleen
1998-06-30 14:08 ` Jeffrey A Law
1998-06-30 9:24 ` Richard Henderson
1998-06-30 1:02 ` Jeffrey A Law
1998-06-30 11:53 ` Joern Rennecke [this message]
1998-06-30 11:53 ` Jeffrey A Law
1998-07-01 3:42 ` Richard Henderson
1998-06-30 15:15 ` Bill Currie
1998-06-30 15:26 ` Jeffrey A Law
1998-06-30 23:15 ` Bill Currie
1998-06-30 19:49 ` Jeffrey A Law
1998-07-01 10:51 ` Joern Rennecke
1998-07-01 10:51 ` Jeffrey A Law
1998-07-01 13:20 Michael Meissner
1998-07-01 20:15 ` Joern Rennecke
[not found] <359ABD84.2FC4@tssc.co.nz>
1998-07-02 1:39 ` Jeffrey A Law
1998-07-02 1:39 ` Bill Currie
1998-07-02 1:39 ` Jeffrey A Law
1998-07-03 0:12 ` Bill Currie
1998-07-02 11:02 ` Joern Rennecke
1998-07-02 15:15 ` Bill Currie
1998-07-02 15:15 ` Joern Rennecke
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