Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!amdahl!nsc!taux01!taux02!yuval
From: yuval@taux02.UUCP (Gideon Yuval)
Newsgroups: comp.arch
Subject: Re: Sun 4 MIPS rating [really: IQFs]
Message-ID: <99@taux02.UUCP>
Date: 25 Aug 88 06:42:22 GMT
References: <941@srs.UUCP> <408@ma.diab.se> <2693@winchester.mips.COM>
Reply-To: yuval@taux02.UUCP (Gideon Yuval)
Organization: National Semiconductor (IC) Ltd, Israel
Lines: 16

In article <2693@winchester.mips.COM> mash@winchester.UUCP (John Mashey) writes:
>2) It might be reasonable to compute IQFs, but you need access to very
>good architectural simulations.  It is very hard to measure them by running
>benchmarks.

Ori Danieli's M.Sc. Thesis (Tel Aviv University, 7/88) has  some  simulations
on  two  architectures:  one  is  almost  the full NS32K architecture (except
that memory-to-memory operations are not there); the other  is  a  load/store
RISC  subset  of the NS32K architecture. He finds a 12% average difference in
the number of  instructions  needed  to  run  the  same  program.  In  the  5
programs  run,  this  difference was 7% for DC, PTC (a Pascal-to-C converter)
and SORT, 17% for GREP, and 23% for SED.

-- 
Gideon Yuval, yuval@taux01.nsc.com, +972-2-690992 (home) ,-52-522255(work)
 Paper-mail: National Semiconductor, 6 Maskit St., Herzliyah, Israel
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