From tpopov@rwth-aachen.de Sun Apr 24 03:56:35 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!rwth-aachen!tpopov
From: tpopov@rwth-aachen.de (Tobias Popov)
Newsgroups: comp.sys.m68k
Subject: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Apr24.035635.9603@rwth-aachen.de>
Date: Sun, 24 Apr 1994 03:56:35 GMT
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Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow.
A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions.

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

-- 
Tobias Popov
Opinions expressed are solely my own and not those of RWTH Aachen Informatik.
------------------------------------------------------------

From dpopov@tum.de Sun Apr 24 09:57:35 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!tum!dpopov
From: dpopov@tum.de (Dong-hyun Popov)
Newsgroups: comp.sys.m68k
Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Apr24.095735.3110@tum.de>
Date: Sun, 24 Apr 1994 09:57:35 GMT
References: <1994Apr24.035635.9603@rwth-aachen.de>
Organization: Technische Universität München
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In article <1994Apr24.035635.9603@rwth-aachen.de>, tpopov@rwth-aachen.de (Tobias Popov) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).
> Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow.

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

-- 
Dong-hyun Popov
Opinions expressed are solely my own and not those of Technische Universität München.
------------------------------------------------------------

From aandersson@uu.net Tue Apr 26 13:14:35 1994
Path: ashpoly!cascade!bigsur!uu!aandersson
From: aandersson@uu.net (Astrid Andersson)
Newsgroups: comp.sys.m68k
Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Apr26.131435.2748@uu.net>
Date: Tue, 26 Apr 1994 13:14:35 GMT
References: <1994Apr24.035635.9603@rwth-aachen.de> <1994Apr24.095735.3110@tum.de>
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In article <1994Apr24.095735.3110@tum.de>, dpopov@tum.de (Dong-hyun Popov) writes:
> The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds.

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

-- 
Astrid Andersson
Tape trading list upon request. SASE required for international mail.

From tkim@unam.mx Wed Apr 27 23:30:35 1994
Path: ashpoly!cascade!transat!ukc!fennimore!unam!tkim
From: tkim@unam.mx (Tyler Kim)
Newsgroups: comp.sys.m68k
Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Apr27.233035.4955@unam.mx>
Date: Wed, 27 Apr 1994 23:30:35 GMT
References: <1994Apr24.035635.9603@rwth-aachen.de>
Organization: Universidad Nacional Autónoma de México (DGSCA)
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In article <1994Apr24.035635.9603@rwth-aachen.de>, tpopov@rwth-aachen.de (Tobias Popov) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).
> Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow.

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

-- 
Tyler Kim | tkim@unam.mx
PGP Key fingerprint: 02B8 7BB6 E3F8 3C5C
"Keep the channels open."