From mvasiliev@earthlink.net Mon Jan 15 10:04:17 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!mvasiliev From: mvasiliev@earthlink.net (Morag Vasiliev) Newsgroups: comp.sys.m68k Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jan15.100417.8828@earthlink.net> Date: Mon, 15 Jan 1996 10:04:17 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 11 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. -- Morag Vasiliev "A soul is not exclusive to biology." PC-9821Ap2 (NEC) / System 7.5.1 From htakahashi@utexas.edu Wed Jan 17 07:59:17 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!utexas!htakahashi From: htakahashi@utexas.edu (Hana Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jan17.075917.7290@utexas.edu> Date: Wed, 17 Jan 1996 07:59:17 GMT References: <1996Jan15.100417.8828@earthlink.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Jan15.100417.8828@earthlink.net>, mvasiliev@earthlink.net (Morag Vasiliev) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Hana Takahashi -- University of Texas at Austin "There are 14 nodes and only 10 countries. Count again." From enovak@clari.net Thu Jan 18 16:29:17 1996 Path: ashpoly!cascade!bigsur!clari!enovak From: enovak@clari.net (Emi Novak) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jan18.162917.4914@clari.net> Date: Thu, 18 Jan 1996 16:29:17 GMT References: <1996Jan15.100417.8828@earthlink.net> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1996Jan15.100417.8828@earthlink.net>, mvasiliev@earthlink.net (Morag Vasiliev) writes: > 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. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Emi Novak Opinions expressed are solely my own and not those of ClariNet Communications Corp. ------------------------------------------------------------ From akowalski@pipeline.com Fri Jan 19 16:41:17 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!pipeline!akowalski From: akowalski@pipeline.com (Aiko Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jan19.164117.1215@pipeline.com> Date: Fri, 19 Jan 1996 16:41:17 GMT References: <1996Jan15.100417.8828@earthlink.net> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Jan15.100417.8828@earthlink.net>, mvasiliev@earthlink.net (Morag Vasiliev) 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. -- Aiko Kowalski Opinions expressed are solely my own and not those of The Pipeline Internet Network. ------------------------------------------------------------