From gjohansson@cam.ac.uk Tue Jun 25 11:09:28 1996
Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!gjohansson
From: gjohansson@cam.ac.uk (Graham Johansson)
Newsgroups: comp.sys.m68k
Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Jun25.110928.7491@cam.ac.uk>
Date: Tue, 25 Jun 1996 11:09:28 GMT
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Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.
Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow.

Make sure you install the 32-bit Enabler on older IIci machines running System 7.1!

-- 
Graham Johansson -- University of Cambridge Computer Laboratory
"Extraordinary claims require extraordinary spectra."

From ofischer@ox.ac.uk Thu Jun 27 07:10:28 1996
Path: ashpoly!cascade!bigsur!ox!ofischer
From: ofischer@ox.ac.uk (Olga Fischer)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Jun27.071028.6082@ox.ac.uk>
Date: Thu, 27 Jun 1996 07:10:28 GMT
References: <1996Jun25.110928.7491@cam.ac.uk>
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In article <1996Jun25.110928.7491@cam.ac.uk>, gjohansson@cam.ac.uk (Graham Johansson) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds.

-- 
Olga Fischer
Opinions expressed are solely my own and not those of Oxford University Computing Laboratory.
------------------------------------------------------------

From swatanabe@pipeline.com Sat Jun 29 00:03:28 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!pipeline!swatanabe
From: swatanabe@pipeline.com (Steve Watanabe)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Jun29.000328.3839@pipeline.com>
Date: Sat, 29 Jun 1996 00:03:28 GMT
References: <1996Jun25.110928.7491@cam.ac.uk>
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In article <1996Jun25.110928.7491@cam.ac.uk>, gjohansson@cam.ac.uk (Graham Johansson) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds.

Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs.

-- 
Steve Watanabe -- The Pipeline Internet Network
"Do not worship the copy."