From mramirez@delphi.com Mon Nov 14 02:21:09 1994
Path: ashpoly!cascade!bigsur!delphi!mramirez
From: mramirez@delphi.com (Mathieu Ramírez)
Newsgroups: comp.sys.m68k
Subject: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Nov14.022109.4189@delphi.com>
Date: Mon, 14 Nov 1994 02:21:09 GMT
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Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

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.

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

-- 
Mathieu Ramírez
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From ahernandez@earthlink.net Mon Nov 14 13:45:09 1994
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From: ahernandez@earthlink.net (Anja Hernández)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Nov14.134509.2054@earthlink.net>
Date: Mon, 14 Nov 1994 13:45:09 GMT
References: <1994Nov14.022109.4189@delphi.com>
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In article <1994Nov14.022109.4189@delphi.com>, mramirez@delphi.com (Mathieu Ramírez) 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.

-- 
Anja Hernández
Tape trading list upon request. SASE required for international mail.