Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!mcsun!sunic!dkuug!harald.ruc.dk!jba
From: jba@harald.ruc.dk (Jan B. Andersen)
Newsgroups: comp.arch
Subject: Re: Self-modifying code
Message-ID: <173@harald.UUCP>
Date: 16 Oct 89 09:40:13 GMT
References: <6481@pt.cs.cmu.edu> <9175@etana.tut.fi> <1619@atanasoff.cs.iastate.edu>
Organization: RUC - Roskilde University Center, Denmark
Lines: 14

>In article <9175@etana.tut.fi> pl@etana.tut.fi (Lehtinen Pertti) writes:
>}From article <6481@pt.cs.cmu.edu>, by koopman@a.gp.cs.cmu.edu (Philip Koopman):
>  
>}	I've been lately wondering if there is any architecture
>}	with possibility to execute instruction indirectly.
> 
>}	I mean something like:
>}
>}		exec (r0)	; execute instruction pointed by r0
> 
>}	Does anyone know?

Data General's MV Family has an 'execute accumulator' instruction. Very
useful when implementing a debugger.