From ookonkwo@inria.fr Mon Nov 28 00:29:57 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!ookonkwo From: ookonkwo@inria.fr (Olga Okonkwo) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Nov28.002957.2153@inria.fr> Date: Mon, 28 Nov 1994 00:29:57 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? 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. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Olga Okonkwo Tape trading list upon request. SASE required for international mail. From asouza@cam.ac.uk Mon Nov 28 07:54:57 1994 Path: ashpoly!cascade!brgate!saturno!cam!asouza From: asouza@cam.ac.uk (Aiko Souza) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Nov28.075457.6539@cam.ac.uk> Date: Mon, 28 Nov 1994 07:54:57 GMT References: <1994Nov28.002957.2153@inria.fr> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 8 In article <1994Nov28.002957.2153@inria.fr>, ookonkwo@inria.fr (Olga Okonkwo) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Aiko Souza Tape trading list upon request. SASE required for international mail. From csmirnov@cmu.edu Mon Nov 28 10:55:57 1994 Path: ashpoly!cascade!transat!ukc!fennimore!cmu!csmirnov From: csmirnov@cmu.edu (Camila Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Nov28.105557.3919@cmu.edu> Date: Mon, 28 Nov 1994 10:55:57 GMT References: <1994Nov28.002957.2153@inria.fr> <1994Nov28.075457.6539@cam.ac.uk> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Nov28.075457.6539@cam.ac.uk>, asouza@cam.ac.uk (Aiko Souza) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- === Camila Smirnov === Dept of Electrical Engineering, Carnegie Mellon University School of CS "There are 14 nodes and only 10 countries. Count again." From mramirez@earthlink.net Tue Nov 29 21:24:57 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!earthlink!mramirez From: mramirez@earthlink.net (Min-jun Ramírez) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Nov29.212457.3416@earthlink.net> Date: Tue, 29 Nov 1994 21:24:57 GMT References: <1994Nov28.002957.2153@inria.fr> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Nov28.002957.2153@inria.fr>, ookonkwo@inria.fr (Olga Okonkwo) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Min-jun Ramírez *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From mreyes@uu.net Thu Dec 01 11:37:57 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!uu!mreyes From: mreyes@uu.net (Min-jun Reyes) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Dec01.113757.2461@uu.net> Date: Thu, 01 Dec 1994 11:37:57 GMT References: <1994Nov28.002957.2153@inria.fr> <1994Nov28.075457.6539@cam.ac.uk> <1994Nov28.105557.3919@cmu.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Nov28.105557.3919@cmu.edu>, csmirnov@cmu.edu (Camila Smirnov) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Min-jun Reyes | mreyes@uu.net PGP Key fingerprint: FF48 1BCF C93F 7005 "Keep the channels open."