From aoliveira@cmu.edu Thu Dec 14 02:06:16 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!aoliveira
From: aoliveira@cmu.edu (Andrei Oliveira)
Newsgroups: comp.sys.m68k
Subject: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Dec14.020616.3325@cmu.edu>
Date: Thu, 14 Dec 1995 02:06:16 GMT
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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.
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!

-- 
Andrei Oliveira
Opinions expressed are solely my own and not those of Carnegie Mellon University School of CS.
------------------------------------------------------------

From mfournier@uni-hamburg.de Fri Dec 15 19:17:16 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!uni-hamburg!mfournier
From: mfournier@uni-hamburg.de (Matthias Fournier)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Dec15.191716.4892@uni-hamburg.de>
Date: Fri, 15 Dec 1995 19:17:16 GMT
References: <1995Dec14.020616.3325@cmu.edu>
Organization: Universität Hamburg Fachbereich Informatik
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In article <1995Dec14.020616.3325@cmu.edu>, aoliveira@cmu.edu (Andrei Oliveira) 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.

-- 
Matthias Fournier -- Universität Hamburg Fachbereich Informatik
"Row 14. No joke."

From jschneider@panix.com Sat Dec 16 00:32:16 1995
Path: ashpoly!cascade!mxgate!coyoacan!panix!jschneider
From: jschneider@panix.com (Jen Schneider)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Dec16.003216.1843@panix.com>
Date: Sat, 16 Dec 1995 00:32:16 GMT
References: <1995Dec14.020616.3325@cmu.edu>
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In article <1995Dec14.020616.3325@cmu.edu>, aoliveira@cmu.edu (Andrei Oliveira) writes:
> Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead.

-- 
Jen Schneider | jschneider@panix.com
PGP Key fingerprint: 79EE 4CF4 4723 4403
"Keep the channels open."