From jfischer@unam.mx Thu Apr 14 02:31:54 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!jfischer From: jfischer@unam.mx (Ji-woo Fischer) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr14.023154.9968@unam.mx> Date: Thu, 14 Apr 1994 02:31:54 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Ji-woo Fischer "Marcus is not one man." PC-9821Ap2 (NEC) / TOS 4.04 From mivanov@purdue.edu Fri Apr 15 22:03:54 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!purdue!mivanov From: mivanov@purdue.edu (Matthias Ivanov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr15.220354.7050@purdue.edu> Date: Fri, 15 Apr 1994 22:03:54 GMT References: <1994Apr14.023154.9968@unam.mx> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Apr14.023154.9968@unam.mx>, jfischer@unam.mx (Ji-woo Fischer) 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Matthias Ivanov Opinions expressed are solely my own and not those of Purdue University Engineering Computer Network. ------------------------------------------------------------ From alaurent@panix.com Sun Apr 17 01:15:54 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!panix!alaurent From: alaurent@panix.com (Amy Laurent) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr17.011554.5119@panix.com> Date: Sun, 17 Apr 1994 01:15:54 GMT References: <1994Apr14.023154.9968@unam.mx> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 12 In article <1994Apr14.023154.9968@unam.mx>, jfischer@unam.mx (Ji-woo Fischer) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > 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. -- Amy Laurent *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From flee@kth.se Mon Apr 18 23:53:54 1994 Path: ashpoly!cascade!mxgate!coyoacan!kth!flee From: flee@kth.se (Fiona Lee) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr18.235354.1571@kth.se> Date: Mon, 18 Apr 1994 23:53:54 GMT References: <1994Apr14.023154.9968@unam.mx> <1994Apr15.220354.7050@purdue.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Apr15.220354.7050@purdue.edu>, mivanov@purdue.edu (Matthias Ivanov) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. > Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Fiona Lee -- Royal Institute of Technology, Stockholm "Row 14. No joke." From eito@uni-hamburg.de Tue Apr 19 06:46:54 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!eito From: eito@uni-hamburg.de (Élodie Ito) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr19.064654.2778@uni-hamburg.de> Date: Tue, 19 Apr 1994 06:46:54 GMT References: <1994Apr14.023154.9968@unam.mx> <1994Apr15.220354.7050@purdue.edu> <1994Apr18.235354.1571@kth.se> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Apr18.235354.1571@kth.se>, flee@kth.se (Fiona Lee) 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. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Élodie Ito "In theory there is no difference between theory and practice." Mac IIci / 68882 FPU / SunOS 4.1.4