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Re: Porting GCC: Compare-and-Branch-Instructions

To: Richard Henderson <rth at cygnus dot com>
Subject: Re: Porting GCC: Compare-and-Branch-Instructions
From: Geoff Keating <geoffk at cygnus dot com>
Date: 04 Feb 2000 12:58:34 -0800
CC: gcc at gcc dot gnu dot org
References: <389B02EF.FB360A8B@t-online.de> <20000204103038.B30707@cygnus.com>

Richard Henderson <rth@cygnus.com> writes:

> On Fri, Feb 04, 2000 at 05:48:47PM +0100, Anja Müller wrote:
> > But how can I "record operands in static variables" and how can I "use
> > the remembered operands" in the Instruction Pattern ? Can you give me an
> > example?
> 
> Look at the alpha port.  Or the i386 port.  Actually, most of
> the ports use this technique.

Yes.  Really, we should fix this, and just have a 'compare_and_branch'
pattern that expands to whatever is appropriate for the port.

-- 
- Geoffrey Keating <geoffk@cygnus.com>

Follow-Ups:
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References:
- Porting GCC: Compare-and-Branch-Instructions
  - From: Anja Müller
- Re: Porting GCC: Compare-and-Branch-Instructions
  - From: Richard Henderson

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