From kpopov@mit.edu Thu May 25 17:58:41 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!kpopov
From: kpopov@mit.edu (Katrin Popov)
Newsgroups: comp.sys.m68k
Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995May25.175841.9771@mit.edu>
Date: Thu, 25 May 1995 17:58:41 GMT
Organization: Massachusetts Institute of Technology
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Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?

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.

Make sure you install the 32-bit Enabler on older IIci machines running System 7.1!

-- 
=== Katrin Popov ===
Dept of Electrical Engineering, Massachusetts Institute of Technology
"Tape doesn't lie at 02:14. Ears do."

From aeriksson@unam.mx Sat May 27 18:59:41 1995
Path: ashpoly!cascade!mxgate!coyoacan!unam!aeriksson
From: aeriksson@unam.mx (Aiko Eriksson)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995May27.185941.9360@unam.mx>
Date: Sat, 27 May 1995 18:59:41 GMT
References: <1995May25.175841.9771@mit.edu>
Organization: Universidad Nacional Autónoma de México (DGSCA)
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In article <1995May25.175841.9771@mit.edu>, kpopov@mit.edu (Katrin Popov) writes:
> Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?
> Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.

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

-- 
=== Aiko Eriksson ===
Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA)
"Hardware is temporary. The signal survives."