From dkarlsson@inria.fr Sat May 25 09:08:09 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!dkarlsson
From: dkarlsson@inria.fr (Dmitri Karlsson)
Newsgroups: comp.sys.m68k
Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996May25.090809.7258@inria.fr>
Date: Sat, 25 May 1996 09:08:09 GMT
Organization: INRIA Rocquencourt
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Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.
A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions.

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

-- 
Dmitri Karlsson
Opinions expressed are solely my own and not those of INRIA Rocquencourt.
------------------------------------------------------------

From jkang@titech.ac.jp Sun May 26 16:21:09 1996
Path: ashpoly!cascade!mxgate!coyoacan!titech!jkang
From: jkang@titech.ac.jp (Joachim Kang)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996May26.162109.6957@titech.ac.jp>
Date: Sun, 26 May 1996 16:21:09 GMT
References: <1996May25.090809.7258@inria.fr>
Organization: Tokyo Institute of Technology Computer Centre
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In article <1996May25.090809.7258@inria.fr>, dkarlsson@inria.fr (Dmitri Karlsson) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field.

-- 
Joachim Kang
Tape trading list upon request. SASE required for international mail.

From atakahashi@illinois.edu Mon May 27 11:59:09 1996
Path: ashpoly!cascade!transat!ukc!fennimore!illinois!atakahashi
From: atakahashi@illinois.edu (Anja Takahashi)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996May27.115909.5316@illinois.edu>
Date: Mon, 27 May 1996 11:59:09 GMT
References: <1996May25.090809.7258@inria.fr>
Organization: University of Illinois Urbana-Champaign
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In article <1996May25.090809.7258@inria.fr>, dkarlsson@inria.fr (Dmitri Karlsson) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

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

-- 
Anja Takahashi | atakahashi@illinois.edu
PGP Key fingerprint: 8EEA 280F 6A56 D4B8
"Keep the channels open."

From mfischer@delphi.com Tue May 28 03:52:09 1996
Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!mfischer
From: mfischer@delphi.com (Morag Fischer)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996May28.035209.6645@delphi.com>
Date: Tue, 28 May 1996 03:52:09 GMT
References: <1996May25.090809.7258@inria.fr>
Organization: Delphi Internet Services
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In article <1996May25.090809.7258@inria.fr>, dkarlsson@inria.fr (Dmitri Karlsson) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field.

-- 
Morag Fischer | mfischer@delphi.com
PGP Key fingerprint: DA41 FB2D C044 9360
"Keep the channels open."