From llindqvist@earthlink.net Wed Oct 26 12:13:18 1994
Path: ashpoly!bigsur!pacrim!jpgate!kamome!earthlink!llindqvist
From: llindqvist@earthlink.net (Lucia Lindqvist)
Newsgroups: comp.sys.m68k
Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Oct26.121318.9815@earthlink.net>
Date: Wed, 26 Oct 1994 12:13:18 GMT
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Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

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

I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector.

-- 
=== Lucia Lindqvist ===
Dept of Electrical Engineering, EarthLink Network
"Extraordinary claims require extraordinary spectra."

From beriksson@rwth-aachen.de Thu Oct 27 14:37:18 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!beriksson
From: beriksson@rwth-aachen.de (Bill Eriksson)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Oct27.143718.9332@rwth-aachen.de>
Date: Thu, 27 Oct 1994 14:37:18 GMT
References: <1994Oct26.121318.9815@earthlink.net>
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In article <1994Oct26.121318.9815@earthlink.net>, llindqvist@earthlink.net (Lucia Lindqvist) writes:
> Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

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

-- 
Bill Eriksson | beriksson@rwth-aachen.de
PGP Key fingerprint: FEBC 5999 9977 32B0
"Keep the channels open."

From mlindqvist@purdue.edu Fri Oct 28 09:36:18 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!purdue!mlindqvist
From: mlindqvist@purdue.edu (Mike Lindqvist)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Oct28.093618.8283@purdue.edu>
Date: Fri, 28 Oct 1994 09:36:18 GMT
References: <1994Oct26.121318.9815@earthlink.net> <1994Oct27.143718.9332@rwth-aachen.de>
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In article <1994Oct27.143718.9332@rwth-aachen.de>, beriksson@rwth-aachen.de (Bill Eriksson) writes:
> The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds.

Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field.

-- 
Mike Lindqvist
Tape trading list upon request. SASE required for international mail.

From htakahashi@cmu.edu Sat Oct 29 09:04:18 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cmu!htakahashi
From: htakahashi@cmu.edu (Heather Takahashi)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Oct29.090418.2464@cmu.edu>
Date: Sat, 29 Oct 1994 09:04:18 GMT
References: <1994Oct26.121318.9815@earthlink.net>
Organization: Carnegie Mellon University School of CS
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In article <1994Oct26.121318.9815@earthlink.net>, llindqvist@earthlink.net (Lucia Lindqvist) writes:
> Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

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

-- 
Heather Takahashi
Tape trading list upon request. SASE required for international mail.