From: "Frank Ch. Eigler" <fche@redhat.com>
To: Will Newton <will.newton@imgtec.com>
Cc: cgen@sources.redhat.com
Subject: Re: Constraints between operands
Date: Thu, 08 Sep 2005 20:28:00 -0000 [thread overview]
Message-ID: <20050908202809.GA28732@redhat.com> (raw)
In-Reply-To: <0D107966AF6D79418315B7C5549F4B5104DFDC@lemail1.le.imgtec.org>
Hi -
On Thu, Sep 08, 2005 at 02:55:16PM +0100, Will Newton wrote:
> [...]
> I'm using cgen to write a binutils port for a processor. I've come
> across a problem I haven't been able to solve yet with expressing a
> constraint between a number of fields in an instruction.
> [...]
> ADD D0.1,D0.2 ; Data unit 0 for both regs, OK
> ADD D0.1,D1.2 ; Data unit mismatch, error!
> [...]
One way may be to write a custom operand parser for the second D slot,
which would enforce this constraint. It would signal a parse error.
- FChE
next prev parent reply other threads:[~2005-09-08 20:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-08 13:56 Will Newton
2005-09-08 20:28 ` Frank Ch. Eigler [this message]
2005-09-09 9:08 Will Newton
2005-09-21 15:39 ` Doug Evans
2005-09-21 16:03 Will Newton
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