From nmoreau@delphi.com Sat Jun 11 04:07:50 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!delphi!nmoreau From: nmoreau@delphi.com (Natalia Moreau) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jun11.040750.3325@delphi.com> Date: Sat, 11 Jun 1994 04:07:50 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. 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. -- Natalia Moreau *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From mrobertson@illinois.edu Mon Jun 13 02:51:50 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!mrobertson From: mrobertson@illinois.edu (Mikhail Robertson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jun13.025150.7433@illinois.edu> Date: Mon, 13 Jun 1994 02:51:50 GMT References: <1994Jun11.040750.3325@delphi.com> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1994Jun11.040750.3325@delphi.com>, nmoreau@delphi.com (Natalia Moreau) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. 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. -- === Mikhail Robertson === Dept of Electrical Engineering, University of Illinois Urbana-Champaign "Do not worship the copy." From tmartinez@mit.edu Tue Jun 14 03:21:50 1994 Path: ashpoly!cascade!bigsur!mit!tmartinez From: tmartinez@mit.edu (Takeshi Martínez) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jun14.032150.4324@mit.edu> Date: Tue, 14 Jun 1994 03:21:50 GMT References: <1994Jun11.040750.3325@delphi.com> <1994Jun13.025150.7433@illinois.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Jun13.025150.7433@illinois.edu>, mrobertson@illinois.edu (Mikhail Robertson) 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Takeshi Martínez | tmartinez@mit.edu PGP Key fingerprint: DC97 AEA6 DEEB E7A1 "Keep the channels open." From mbrennan@illinois.edu Tue Jun 14 20:46:50 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!illinois!mbrennan From: mbrennan@illinois.edu (Mei Brennan) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jun14.204650.3432@illinois.edu> Date: Tue, 14 Jun 1994 20:46:50 GMT References: <1994Jun11.040750.3325@delphi.com> <1994Jun13.025150.7433@illinois.edu> <1994Jun14.032150.4324@mit.edu> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Jun14.032150.4324@mit.edu>, tmartinez@mit.edu (Takeshi Martínez) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. > Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Mei Brennan Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------