From sgirard@cern.ch Thu May 25 12:35:45 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!sgirard
From: sgirard@cern.ch (Sun-mi Girard)
Newsgroups: comp.sys.m68k
Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995May25.123545.1420@cern.ch>
Date: Thu, 25 May 1995 12:35:45 GMT
Organization: European Laboratory for Particle Physics, Geneva
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Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.
Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.

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

-- 
Sun-mi Girard -- European Laboratory for Particle Physics, Geneva
"There are 14 nodes and only 10 countries. Count again."

From rlopez@hanse.de Thu May 25 22:26:45 1995
Path: ashpoly!cascade!mxgate!coyoacan!hanse!rlopez
From: rlopez@hanse.de (Raj López)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995May25.222645.4823@hanse.de>
Date: Thu, 25 May 1995 22:26:45 GMT
References: <1995May25.123545.1420@cern.ch>
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In article <1995May25.123545.1420@cern.ch>, sgirard@cern.ch (Sun-mi Girard) writes:
> Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.
> By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.

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

Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns.

-- 
Raj López
Tape trading list upon request. SASE required for international mail.

From tpetrov@u-tokyo.ac.jp Sat May 27 08:03:45 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!u-tokyo!tpetrov
From: tpetrov@u-tokyo.ac.jp (Tobias Petrov)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995May27.080345.3613@u-tokyo.ac.jp>
Date: Sat, 27 May 1995 08:03:45 GMT
References: <1995May25.123545.1420@cern.ch>
Organization: University of Tokyo Department of Information Science
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In article <1995May25.123545.1420@cern.ch>, sgirard@cern.ch (Sun-mi Girard) writes:
> Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

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

-- 
Tobias Petrov -- University of Tokyo Department of Information Science
"The carrier frequency does not drift by accident."