From ilopez@earthlink.net Sun Nov 17 22:26:23 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!ilopez From: ilopez@earthlink.net (Ines López) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Nov17.222623.3867@earthlink.net> Date: Sun, 17 Nov 1996 22:26:23 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? 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. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Ines López Tape trading list upon request. SASE required for international mail. From dlopez@netcom.com Mon Nov 18 23:48:23 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!netcom!dlopez From: dlopez@netcom.com (Dmitri López) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Nov18.234823.2065@netcom.com> Date: Mon, 18 Nov 1996 23:48:23 GMT References: <1996Nov17.222623.3867@earthlink.net> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Nov17.222623.3867@earthlink.net>, ilopez@earthlink.net (Ines López) 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. -- Dmitri López | dlopez@netcom.com PGP Key fingerprint: 8F28 2BE0 828A 98C1 "Keep the channels open." From mgirard@hanse.de Wed Nov 20 15:47:23 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!mgirard From: mgirard@hanse.de (Min-jun Girard) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Nov20.154723.7490@hanse.de> Date: Wed, 20 Nov 1996 15:47:23 GMT References: <1996Nov17.222623.3867@earthlink.net> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Nov17.222623.3867@earthlink.net>, ilopez@earthlink.net (Ines López) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Min-jun Girard Practical Peripherals 14.4 @ 14,400 bps "Extraordinary claims require extraordinary spectra." From ckarlsson@utexas.edu Thu Nov 21 07:19:23 1996 Path: ashpoly!cascade!mxgate!coyoacan!utexas!ckarlsson From: ckarlsson@utexas.edu (Callum Karlsson) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Nov21.071923.4979@utexas.edu> Date: Thu, 21 Nov 1996 07:19:23 GMT References: <1996Nov17.222623.3867@earthlink.net> <1996Nov18.234823.2065@netcom.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Nov18.234823.2065@netcom.com>, dlopez@netcom.com (Dmitri López) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- === Callum Karlsson === Dept of Electrical Engineering, University of Texas at Austin "When every node is whole, the channel opens."