From lwatanabe@unam.mx Thu Nov 17 00:17:53 1994
Path: ashpoly!cascade!transat!ukc!fennimore!unam!lwatanabe
From: lwatanabe@unam.mx (Lars Watanabe)
Newsgroups: comp.sys.m68k
Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Nov17.001753.3185@unam.mx>
Date: Thu, 17 Nov 1994 00:17:53 GMT
Organization: Universidad Nacional Autónoma de México (DGSCA)
NNTP-Posting-Host: unam.mx
X-Newsreader: TIN [version 1.2 PL2]
Lines: 10

Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.
Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow.

I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector.

-- 
Lars Watanabe -- Universidad Nacional Autónoma de México (DGSCA)
"Hold for relay."

From tdubois@tum.de Fri Nov 18 23:59:53 1994
Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!tdubois
From: tdubois@tum.de (Takeshi Dubois)
Newsgroups: comp.sys.m68k
Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Nov18.235953.9040@tum.de>
Date: Fri, 18 Nov 1994 23:59:53 GMT
References: <1994Nov17.001753.3185@unam.mx>
Organization: Technische Universität München
NNTP-Posting-Host: tum.de
X-Newsreader: NewsWatcher 2.0b24
Lines: 9

In article <1994Nov17.001753.3185@unam.mx>, lwatanabe@unam.mx (Lars Watanabe) 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.

-- 
Takeshi Dubois <tdubois@tum.de>
*PLONK* filter active for trolls.
NeXTstation Turbo Color - NetBSD 1.0

From lcampbell@rwth-aachen.de Sat Nov 19 10:43:53 1994
Path: ashpoly!cascade!brgate!saturno!rwth-aachen!lcampbell
From: lcampbell@rwth-aachen.de (Lars Campbell)
Newsgroups: comp.sys.m68k
Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Nov19.104353.7038@rwth-aachen.de>
Date: Sat, 19 Nov 1994 10:43:53 GMT
References: <1994Nov17.001753.3185@unam.mx> <1994Nov18.235953.9040@tum.de>
Organization: RWTH Aachen Informatik
NNTP-Posting-Host: rwth-aachen.de
X-Newsreader: TIN [version 1.2 PL2]
Lines: 10

In article <1994Nov18.235953.9040@tum.de>, tdubois@tum.de (Takeshi Dubois) 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.

If you are posting from AOL, please read RFC 1036 before posting again.

-- 
Lars Campbell -- RWTH Aachen Informatik
"The hatch is open. Is anyone listening?"