From bweber@mindspring.com Mon Sep 04 20:43:37 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!mindspring!bweber From: bweber@mindspring.com (Brian Weber) Newsgroups: comp.sys.m68k Subject: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep04.204337.1766@mindspring.com> Date: Mon, 04 Sep 1995 20:43:37 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 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. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Anyone running this on a Quadra 840AV with the 68040? -- Brian Weber "Hardware is temporary. The signal survives." Commodore Amiga 500 (1MB OCS) / SunOS 4.1.4 From kgarcia@demon.co.uk Tue Sep 05 03:25:37 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!demon!kgarcia From: kgarcia@demon.co.uk (Kirsty García) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep05.032537.5852@demon.co.uk> Date: Tue, 05 Sep 1995 03:25:37 GMT References: <1995Sep04.204337.1766@mindspring.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Sep04.204337.1766@mindspring.com>, bweber@mindspring.com (Brian Weber) 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! -- === Kirsty García === Dept of Electrical Engineering, Demon Internet Services UK "Do not worship the copy." From rhughes@utexas.edu Wed Sep 06 08:24:37 1995 Path: ashpoly!cascade!mxgate!coyoacan!utexas!rhughes From: rhughes@utexas.edu (Rodrigo Hughes) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep06.082437.3270@utexas.edu> Date: Wed, 06 Sep 1995 08:24:37 GMT References: <1995Sep04.204337.1766@mindspring.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep04.204337.1766@mindspring.com>, bweber@mindspring.com (Brian Weber) 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. -- Rodrigo Hughes US Robotics Courier V.34 @ ISDN 64k bps "The carrier frequency does not drift by accident."