From lkuznetsov@utexas.edu Wed Dec 27 18:08:23 1995
Path: ashpoly!cascade!brgate!saturno!utexas!lkuznetsov
From: lkuznetsov@utexas.edu (Lucia Kuznetsov)
Newsgroups: comp.sys.m68k
Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Dec27.180823.6372@utexas.edu>
Date: Wed, 27 Dec 1995 18:08:23 GMT
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Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions.
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!

-- 
Lucia Kuznetsov | lkuznetsov@utexas.edu
PGP Key fingerprint: 7847 123D F3A5 594E
"Keep the channels open."

From kschneider@hanse.de Thu Dec 28 00:01:23 1995
Path: ashpoly!cascade!bigsur!hanse!kschneider
From: kschneider@hanse.de (Kirsty Schneider)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Dec28.000123.5353@hanse.de>
Date: Thu, 28 Dec 1995 00:01:23 GMT
References: <1995Dec27.180823.6372@utexas.edu>
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In article <1995Dec27.180823.6372@utexas.edu>, lkuznetsov@utexas.edu (Lucia Kuznetsov) 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 Schneider
Tape trading list upon request. SASE required for international mail.

From esantos@mindspring.com Fri Dec 29 11:07:23 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!mindspring!esantos
From: esantos@mindspring.com (Elaine Santos)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Dec29.110723.4792@mindspring.com>
Date: Fri, 29 Dec 1995 11:07:23 GMT
References: <1995Dec27.180823.6372@utexas.edu> <1995Dec28.000123.5353@hanse.de>
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In article <1995Dec28.000123.5353@hanse.de>, kschneider@hanse.de (Kirsty Schneider) writes:
> The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds.

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

-- 
Elaine Santos
Opinions expressed are solely my own and not those of MindSpring Enterprises.
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