🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: comp.arch
Article #20255

Re: Intel/MIPS Dhrystone ratio

#20255
From: Brian bcase Case
Date: Sat, 11 Mar 1989 20:15
14 lines
1163 bytes
>> So where did Intel get the extra 22% ?
>Intel has a 64-bit bus, MIPS 32 bits.  It will take two clocks for MIPS to load
>an immediate value.  Intel can do it in one clock.  If 22% of the instruction
>mix involves immediate values, then we know where Intel 'got it.'

Unless I am missing something, Intel cannot "do it in one clock."  The
mechanism used by the i860 is essentially the same as on other RISCs:
load the low 16 bits, then overload (or add) the high 16 bits.   Even in
dual instruction mode, it takes two instructions (and usually, cycles).

>anybody remember the newsletter DTACK Grounded ?
Yes, I do.  This is the newletter that printed the *WORST* (most inaccurate)
assesment of RISC that I have yet read.  However, I think it was a letter
from a reader, and so doesn't necessarily represent the newsletter's position.
Technical Details
Message-ID: <15690@cup.portal.com>
Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!portal!cup.portal.com!bcase
References: <1552@vicom.COM>

Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!portal!cup.portal.com!bcase
From: bcase@cup.portal.com (Brian bcase Case)
Newsgroups: comp.arch
Subject: Re: Intel/MIPS Dhrystone ratio
Message-ID: <15690@cup.portal.com>
Date: 11 Mar 89 20:15:48 GMT
References: <1552@vicom.COM>
Organization: The Portal System (TM)
Lines: 14