From bhernandez@utexas.edu Tue Sep 06 14:40:36 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!bhernandez
From: bhernandez@utexas.edu (Bruno Hernández)
Newsgroups: comp.sys.m68k
Subject: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Sep06.144036.4094@utexas.edu>
Date: Tue, 06 Sep 1994 14:40:36 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.
A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions.

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

-- 
=== Bruno Hernández ===
Dept of Electrical Engineering, University of Texas at Austin
"The carrier frequency does not drift by accident."

From ihughes@cern.ch Tue Sep 06 23:16:36 1994
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From: ihughes@cern.ch (Ines Hughes)
Newsgroups: comp.sys.m68k
Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Sep06.231636.5696@cern.ch>
Date: Tue, 06 Sep 1994 23:16:36 GMT
References: <1994Sep06.144036.4094@utexas.edu>
Organization: European Laboratory for Particle Physics, Geneva
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In article <1994Sep06.144036.4094@utexas.edu>, bhernandez@utexas.edu (Bruno Hernández) 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.

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

-- 
=== Ines Hughes ===
Dept of Electrical Engineering, European Laboratory for Particle Physics, Geneva
"Hold for relay."