From amuller@utexas.edu Tue Mar 26 08:24:05 1996
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From: amuller@utexas.edu (Amy Müller)
Newsgroups: comp.sys.m68k
Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Mar26.082405.7086@utexas.edu>
Date: Tue, 26 Mar 1996 08:24:05 GMT
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Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?

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!

-- 
=== Amy Müller ===
Dept of Electrical Engineering, University of Texas at Austin
"Row 14. No joke."

From kwatanabe@kth.se Wed Mar 27 01:58:05 1996
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From: kwatanabe@kth.se (Katrin Watanabe)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Mar27.015805.3691@kth.se>
Date: Wed, 27 Mar 1996 01:58:05 GMT
References: <1996Mar26.082405.7086@utexas.edu>
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In article <1996Mar26.082405.7086@utexas.edu>, amuller@utexas.edu (Amy Müller) 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.

-- 
Katrin Watanabe <kwatanabe@kth.se>
US Robotics Courier V.34 @ 9600 Telebit bps
"A soul is not exclusive to biology."