From: Joern Rennecke <amylaar@cygnus.co.uk>
To: nik@tiuk.ti.com
Cc: law@cygnus.com, egcs@cygnus.com, michaelh@ongaonga.chch.cri.nz,
meissner@cygnus.com, gcc2@cygnus.com
Subject: Re: base + index register addressing
Date: Mon, 20 Oct 1997 18:12:00 -0000 [thread overview]
Message-ID: <199710202300.AAA01231@cygnus.co.uk> (raw)
In-Reply-To: <199710201403.PAA26045@tiuk.ti.com>
> On some of TI's DSPs index/base are very important as well.
> This is almost the inverse of above case - sets of registers are vital !
> Here to use a register as an index its hard-register number has to be
> "related" to the hard register number of the base.
> Current GCC register allocation just cannot handle this, so I have
> "given up" (and just lurk here).
Why so you think gcc cannot handle this? Just describe the relatedness
of the registers with register classes, and enforce it in the REG_OK_STRICT
version of GO_IF_LEGITIMATE_ADDRESS .
next prev parent reply other threads:[~1997-10-20 18:12 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-10-17 12:53 meissner
1997-10-17 13:57 ` Jeffrey A Law
1997-10-17 20:51 ` Michael P. Hayes
1997-10-17 21:40 ` Jeffrey A Law
1997-10-20 9:43 ` Nick Ing-Simmons
1997-10-20 18:12 ` Joern Rennecke [this message]
1997-10-21 8:49 ` Nick Ing-Simmons
1997-10-21 9:25 ` John Carr
1997-10-17 12:53 meissner
1997-10-17 13:57 ` Jeffrey A Law
1997-10-17 20:51 ` Richard Henderson
[not found] <199710170919.WAA23619@ongaonga.chch.cri.nz>
1997-10-17 13:57 ` Jeffrey A Law
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