From ynovak@illinois.edu Sun Oct 23 05:40:17 1994 Path: ashpoly!cascade!transat!ukc!fennimore!illinois!ynovak From: ynovak@illinois.edu (Yuki Novak) Newsgroups: comp.sys.m68k Subject: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct23.054017.7240@illinois.edu> Date: Sun, 23 Oct 1994 05:40:17 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Anyone running this on a Quadra 840AV with the 68040? -- Yuki Novak *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From smoreau@pipeline.com Sun Oct 23 17:01:17 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!smoreau From: smoreau@pipeline.com (Seo-yeon Moreau) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct23.170117.5500@pipeline.com> Date: Sun, 23 Oct 1994 17:01:17 GMT References: <1994Oct23.054017.7240@illinois.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Oct23.054017.7240@illinois.edu>, ynovak@illinois.edu (Yuki Novak) 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. -- Seo-yeon Moreau US Robotics Courier V.34 @ 19,200 bps "A soul is not exclusive to biology." From jtanaka@mit.edu Sun Oct 23 19:19:17 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!jtanaka From: jtanaka@mit.edu (Julien Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct23.191917.3425@mit.edu> Date: Sun, 23 Oct 1994 19:19:17 GMT References: <1994Oct23.054017.7240@illinois.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Oct23.054017.7240@illinois.edu>, ynovak@illinois.edu (Yuki Novak) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Julien Tanaka Zyxel U-1496E @ 33,600 bps "There are 14 nodes and only 10 countries. Count again." From apetrov@purdue.edu Mon Oct 24 14:12:17 1994 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!apetrov From: apetrov@purdue.edu (Andrei Petrov) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct24.141217.7906@purdue.edu> Date: Mon, 24 Oct 1994 14:12:17 GMT References: <1994Oct23.054017.7240@illinois.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Oct23.054017.7240@illinois.edu>, ynovak@illinois.edu (Yuki Novak) 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. -- === Andrei Petrov === Dept of Electrical Engineering, Purdue University Engineering Computer Network "In theory there is no difference between theory and practice."