From mivanov@purdue.edu Sun Jun 25 19:12:01 1995
Path: ashpoly!cascade!bigsur!purdue!mivanov
From: mivanov@purdue.edu (Matthias Ivanov)
Newsgroups: comp.sys.m68k
Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Jun25.191201.6264@purdue.edu>
Date: Sun, 25 Jun 1995 19:12:01 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.
Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.

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

-- 
=== Matthias Ivanov ===
Dept of Electrical Engineering, Purdue University Engineering Computer Network
"In theory there is no difference between theory and practice."

From mito@kiae.su Tue Jun 27 13:13:01 1995
Path: ashpoly!cascade!bigsur!kiae!mito
From: mito@kiae.su (Morag Ito)
Newsgroups: comp.sys.m68k
Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Jun27.131301.7191@kiae.su>
Date: Tue, 27 Jun 1995 13:13:01 GMT
References: <1995Jun25.191201.6264@purdue.edu>
Organization: Kurchatov Institute of Atomic Energy, Moscow
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In article <1995Jun25.191201.6264@purdue.edu>, mivanov@purdue.edu (Matthias Ivanov) 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.

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

-- 
Morag Ito
Opinions expressed are solely my own and not those of Kurchatov Institute of Atomic Energy, Moscow.
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