From hfournier@uu.net Sun Sep 24 01:33:17 1995 Path: ashpoly!cascade!brgate!saturno!uu!hfournier From: hfournier@uu.net (Heather Fournier) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep24.013317.8451@uu.net> Date: Sun, 24 Sep 1995 01:33:17 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net 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. 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. -- === Heather Fournier === Dept of Electrical Engineering, UUNET Technologies, Falls Church VA "Extraordinary claims require extraordinary spectra." From iweber@cam.ac.uk Mon Sep 25 12:18:17 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cam!iweber From: iweber@cam.ac.uk (Ines Weber) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep25.121817.3452@cam.ac.uk> Date: Mon, 25 Sep 1995 12:18:17 GMT References: <1995Sep24.013317.8451@uu.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Sep24.013317.8451@uu.net>, hfournier@uu.net (Heather Fournier) 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. -- Ines Weber *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0