Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!hplabs!hpcc05!hpdmd48!sritacco
From: sritacco@hpdmd48.boi.hp.com (Steve Ritacco)
Newsgroups: comp.arch
Subject: Re: 64 Bit addressing on R4000?
Message-ID: <14900025@hpdmd48.boi.hp.com>
Date: 26 Jun 91 15:49:08 GMT
References: <8083@uklirb.informatik.uni-kl.de>
Organization: Hewlett Packard - Boise, ID
Lines: 6

From what I know about the R3000, the only integer unit instruction affected
by 64-bit operation would be the shift instructions which only have a 5 bit
field for shift amount.  Clearly you would have to use the register varient
of the shift instructions, but other than that all the instructions would work
for 32 or 64 bit opperands.  I'm under the impression that the instruction
set was layed out for minimal affect on word size.