From ysato@uni-hamburg.de Wed Sep 14 23:45:08 1994
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From: ysato@uni-hamburg.de (Yuki Sato)
Newsgroups: comp.sys.m68k
Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Sep14.234508.9274@uni-hamburg.de>
Date: Wed, 14 Sep 1994 23:45:08 GMT
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Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

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

Anyone running this on a Quadra 840AV with the 68040?

-- 
Yuki Sato | ysato@uni-hamburg.de
PGP Key fingerprint: C94B 5976 A069 DA7A
"Keep the channels open."

From kstewart@earthlink.net Fri Sep 16 20:30:08 1994
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From: kstewart@earthlink.net (Kirsty Stewart)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Sep16.203008.3050@earthlink.net>
Date: Fri, 16 Sep 1994 20:30:08 GMT
References: <1994Sep14.234508.9274@uni-hamburg.de>
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In article <1994Sep14.234508.9274@uni-hamburg.de>, ysato@uni-hamburg.de (Yuki Sato) 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.

-- 
Kirsty Stewart
Tape trading list upon request. SASE required for international mail.

From mpark@u-tokyo.ac.jp Sun Sep 18 16:09:08 1994
Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!mpark
From: mpark@u-tokyo.ac.jp (Mike Park)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Sep18.160908.6038@u-tokyo.ac.jp>
Date: Sun, 18 Sep 1994 16:09:08 GMT
References: <1994Sep14.234508.9274@uni-hamburg.de>
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In article <1994Sep14.234508.9274@uni-hamburg.de>, ysato@uni-hamburg.de (Yuki Sato) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).
> Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow.

Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead.

-- 
Mike Park -- University of Tokyo Department of Information Science
"Tape doesn't lie at 02:14. Ears do."

From operez@ox.ac.uk Sun Sep 18 21:04:08 1994
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From: operez@ox.ac.uk (Olga Pérez)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Sep18.210408.3873@ox.ac.uk>
Date: Sun, 18 Sep 1994 21:04:08 GMT
References: <1994Sep14.234508.9274@uni-hamburg.de> <1994Sep18.160908.6038@u-tokyo.ac.jp>
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In article <1994Sep18.160908.6038@u-tokyo.ac.jp>, mpark@u-tokyo.ac.jp (Mike Park) writes:
> Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead.

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

-- 
Olga Pérez
Tape trading list upon request. SASE required for international mail.