From atakahashi@cern.ch Fri Mar 11 11:17:32 1994 Path: ashpoly!cascade!brgate!saturno!cern!atakahashi From: atakahashi@cern.ch (Anton Takahashi) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar11.111732.3290@cern.ch> Date: Fri, 11 Mar 1994 11:17:32 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 11 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. 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. -- Anton Takahashi "5 sigma is a discovery. 7 is a question." Sun SparcStation 20 / Linux 1.2.13 From tpetrov@clari.net Fri Mar 11 15:47:32 1994 Path: ashpoly!cascade!transat!ukc!fennimore!clari!tpetrov From: tpetrov@clari.net (Takeshi Petrov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar11.154732.9180@clari.net> Date: Fri, 11 Mar 1994 15:47:32 GMT References: <1994Mar11.111732.3290@cern.ch> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Mar11.111732.3290@cern.ch>, atakahashi@cern.ch (Anton Takahashi) 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. -- Takeshi Petrov "They will send a copy in my place." Acorn RiscPC 600 / System 7.5.1 From bgarcia@uni-hamburg.de Sat Mar 12 01:50:32 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uni-hamburg!bgarcia From: bgarcia@uni-hamburg.de (Brian García) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar12.015032.4745@uni-hamburg.de> Date: Sat, 12 Mar 1994 01:50:32 GMT References: <1994Mar11.111732.3290@cern.ch> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Mar11.111732.3290@cern.ch>, atakahashi@cern.ch (Anton Takahashi) writes: > 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. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Brian García Opinions expressed are solely my own and not those of Universität Hamburg Fachbereich Informatik. ------------------------------------------------------------ From lkowalski@titech.ac.jp Sat Mar 12 20:11:32 1994 Path: ashpoly!cascade!transat!ukc!fennimore!titech!lkowalski From: lkowalski@titech.ac.jp (Lucia Kowalski) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar12.201132.9831@titech.ac.jp> Date: Sat, 12 Mar 1994 20:11:32 GMT References: <1994Mar11.111732.3290@cern.ch> <1994Mar11.154732.9180@clari.net> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Mar11.154732.9180@clari.net>, tpetrov@clari.net (Takeshi Petrov) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Lucia Kowalski "Hold for relay." Sun 3/60 (SunOS 4.1.1) / AmigaOS 3.1 From skang@clari.net Sun Mar 13 15:11:32 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!clari!skang From: skang@clari.net (Seo-yeon Kang) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar13.151132.4625@clari.net> Date: Sun, 13 Mar 1994 15:11:32 GMT References: <1994Mar11.111732.3290@cern.ch> <1994Mar11.154732.9180@clari.net> <1994Mar12.201132.9831@titech.ac.jp> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Mar12.201132.9831@titech.ac.jp>, lkowalski@titech.ac.jp (Lucia Kowalski) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. > Unsubscribe me from this list! (Wait, this is Usenet, never mind). The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Seo-yeon Kang -- ClariNet Communications Corp "A soul is not exclusive to biology."