From mboxrd@z Thu Jan  1 00:00:00 1970
From: fche@redhat.com (Frank Ch. Eigler)
To: apl@alum.mit.edu
Cc: cgen@sourceware.cygnus.com
Subject: Re: problems simulating register-only architecture...
Date: Thu, 24 May 2001 16:04:00 -0000
Message-id: <o566eqe4dg.fsf@touchme.toronto.redhat.com>
References: <200105242031.QAA10298.cygnus.local.cgen@iron>
X-SW-Source: 2001-q2/msg00075.html

lehotsky wrote:

: The machine I'm developing a simulator for is a "register only"
: architecture, whose only memory is 512, 32-bit registers.
: [...]
:   There are 4 registers that are "special", in that
: they are auto-indexed (e.g.) reading register X uses the contents of
: register Y as an indirect register number.
: [...]

This stuff is tricky; some cgen features don't compose well.

I'd advise keeping it simple: use c-call to hook to a single C
getter-setter function pair, and hide the indirection within.  (BTW,
don't bother represent the actual RAM block (h-memory) within cgen.)

- FChE