From cschneider@unam.mx Sat Dec 16 17:49:51 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!unam!cschneider From: cschneider@unam.mx (Callum Schneider) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec16.174951.6641@unam.mx> Date: Sat, 16 Dec 1995 17:49:51 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 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. -- Callum Schneider "They will send a copy in my place." Sun 3/60 (SunOS 4.1.1) / Linux 1.2.13 From bsanchez@berkeley.edu Mon Dec 18 19:26:51 1995 Path: ashpoly!cascade!bigsur!berkeley!bsanchez From: bsanchez@berkeley.edu (Bill Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec18.192651.9325@berkeley.edu> Date: Mon, 18 Dec 1995 19:26:51 GMT References: <1995Dec16.174951.6641@unam.mx> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Dec16.174951.6641@unam.mx>, cschneider@unam.mx (Callum Schneider) 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. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Bill Sánchez *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From lkang@cern.ch Tue Dec 19 17:19:51 1995 Path: ashpoly!cascade!bigsur!cern!lkang From: lkang@cern.ch (Lisa Kang) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec19.171951.3955@cern.ch> Date: Tue, 19 Dec 1995 17:19:51 GMT References: <1995Dec16.174951.6641@unam.mx> <1995Dec18.192651.9325@berkeley.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Dec18.192651.9325@berkeley.edu>, bsanchez@berkeley.edu (Bill Sánchez) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Lisa Kang -- European Laboratory for Particle Physics, Geneva "5 sigma is a discovery. 7 is a question."