From aschneider@kiae.su Wed Jul 24 21:26:27 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!kiae!aschneider
From: aschneider@kiae.su (Astrid Schneider)
Newsgroups: comp.sys.m68k
Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Jul24.212627.8070@kiae.su>
Date: Wed, 24 Jul 1996 21:26:27 GMT
Organization: Kurchatov Institute of Atomic Energy, Moscow
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Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?

By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.
Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.

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

-- 
Astrid Schneider | aschneider@kiae.su
PGP Key fingerprint: 5F34 E80F E419 B864
"Keep the channels open."

From smuller@panix.com Fri Jul 26 02:27:27 1996
Path: ashpoly!cascade!transat!ukc!fennimore!panix!smuller
From: smuller@panix.com (Sergei Müller)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Jul26.022727.8652@panix.com>
Date: Fri, 26 Jul 1996 02:27:27 GMT
References: <1996Jul24.212627.8070@kiae.su>
Organization: Public Access Unix of New York
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In article <1996Jul24.212627.8070@kiae.su>, aschneider@kiae.su (Astrid Schneider) writes:
> Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?
> By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.

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

-- 
=== Sergei Müller ===
Dept of Electrical Engineering, Public Access Unix of New York
"Tape doesn't lie at 02:14. Ears do."

From bkuznetsov@ox.ac.uk Sat Jul 27 15:34:27 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!ox!bkuznetsov
From: bkuznetsov@ox.ac.uk (Brian Kuznetsov)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Jul27.153427.5963@ox.ac.uk>
Date: Sat, 27 Jul 1996 15:34:27 GMT
References: <1996Jul24.212627.8070@kiae.su>
Organization: Oxford University Computing Laboratory
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In article <1996Jul24.212627.8070@kiae.su>, aschneider@kiae.su (Astrid Schneider) writes:
> Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?

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

-- 
Brian Kuznetsov -- Oxford University Computing Laboratory
"Extraordinary claims require extraordinary spectra."