From mboxrd@z Thu Jan  1 00:00:00 1970
From: fche@redhat.com (Frank Ch. Eigler)
To: cgen@sources.redhat.com
Subject: Re: "just in time" compiler/translator for the simulators.
Date: Sat, 15 Sep 2001 11:44:00 -0000
Message-id: <o5elp8mh03.fsf@touchme.toronto.redhat.com>
References: <Pine.GSO.4.33.0109151521580.7857-100000@night> <20010915140753.A532.cygnus.local.cgen@venge.net>
X-SW-Source: 2001-q3/msg00063.html

graydon wrote:

: [...]  another, slightly weirder approach is to scan your target
: programs insns and emit fully-specialized semantic C for those insns
: alone, and feed them into gcc, essentially pre-decoding and
: pre-extracting the entire set of functions used by your program
: alone. [...]

I actually built a working toy implementation of this sort of thing a
few years ago.  It worked fairly well, demonstrating a number of
predictable down-sides, and a number of exciting possibilities.

I never completed the paper on it, but its last draft may be of
interest to you.  If nothing else, it discusses various simulation
techniques, and it's fairly readable.

        http://web.elastic.org/~fche/gxsim.ps

Get it while it's hot .. uhh ... stone cold.  Limited time offer.

- FChE