Article View: comp.arch
Article #22418Re: 64 bit registers
From: Colin Plumb
Date: Tue, 13 Feb 1990 03:02
Date: Tue, 13 Feb 1990 03:02
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1281 bytes
In article <16886@boulder.Colorado.EDU> wallwey@boulder.Colorado.EDU (WALLWEY DEAN WILLIAM) writes: > If I remmember right, the i860 already has 64 bit registers. >Can anybody confirm or deny this? If so, are these the general >registers or only floating point ones. Also I think I remember >the designers used 128 bit busses on the chip to keep certain parts of >it from starving. When I posted my i860 summary, I said that it could lay claim to being the first 64-bit microprocessor. It has a 64-bit external bus, and a fair number of 64-bit operations. It still has 32-bit addresses and 32-bit integer registers, but the floating point unit and the (to my mind, very wierd) graphics units are 64 bits internally. Yes, it's far from pure, but all firsts are bastards in some way. The position is defnesible. -- -Colin
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!watserv1!watdragon!lion!ccplumb From: ccplumb@lion.waterloo.edu (Colin Plumb) Newsgroups: comp.arch Subject: Re: 64 bit registers Message-ID: <20836@watdragon.waterloo.edu> Date: 13 Feb 90 03:02:39 GMT References: <11121@encore.Encore.COM> <16886@boulder.Colorado.EDU> Sender: daemon@watdragon.waterloo.edu Reply-To: ccplumb@lion.waterloo.edu (Colin Plumb) Organization: U. of Waterloo, Ontario Lines: 16