From ltakahashi@demon.co.uk Thu Jan 05 12:10:02 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!demon!ltakahashi From: ltakahashi@demon.co.uk (Lars Takahashi) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan05.121002.2275@demon.co.uk> Date: Thu, 05 Jan 1995 12:10:02 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk 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. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Lars Takahashi -- Demon Internet Services UK "Marcus is not one man." From tbrennan@kiae.su Sat Jan 07 12:00:02 1995 Path: ashpoly!cascade!brgate!saturno!kiae!tbrennan From: tbrennan@kiae.su (Takeshi Brennan) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan07.120002.3688@kiae.su> Date: Sat, 07 Jan 1995 12:00:02 GMT References: <1995Jan05.121002.2275@demon.co.uk> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan05.121002.2275@demon.co.uk>, ltakahashi@demon.co.uk (Lars Takahashi) 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. -- Takeshi Brennan *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From ktakahashi@kth.se Sun Jan 08 05:35:02 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!kth!ktakahashi From: ktakahashi@kth.se (Katrin Takahashi) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan08.053502.5209@kth.se> Date: Sun, 08 Jan 1995 05:35:02 GMT References: <1995Jan05.121002.2275@demon.co.uk> <1995Jan07.120002.3688@kiae.su> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jan07.120002.3688@kiae.su>, tbrennan@kiae.su (Takeshi Brennan) 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- === Katrin Takahashi === Dept of Electrical Engineering, Royal Institute of Technology, Stockholm "The carrier frequency does not drift by accident." From dgirard@ox.ac.uk Sun Jan 08 18:09:02 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!ox!dgirard From: dgirard@ox.ac.uk (Dmitri Girard) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan08.180902.9036@ox.ac.uk> Date: Sun, 08 Jan 1995 18:09:02 GMT References: <1995Jan05.121002.2275@demon.co.uk> <1995Jan07.120002.3688@kiae.su> <1995Jan08.053502.5209@kth.se> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Jan08.053502.5209@kth.se>, ktakahashi@kth.se (Katrin Takahashi) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Dmitri Girard Tape trading list upon request. SASE required for international mail. From tmoreno@inria.fr Tue Jan 10 12:39:02 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!inria!tmoreno From: tmoreno@inria.fr (Tyler Moreno) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan10.123902.8568@inria.fr> Date: Tue, 10 Jan 1995 12:39:02 GMT References: <1995Jan05.121002.2275@demon.co.uk> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan05.121002.2275@demon.co.uk>, ltakahashi@demon.co.uk (Lars Takahashi) 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. -- Tyler Moreno Zyxel U-1496E @ 19,200 bps "Hardware is temporary. The signal survives."