From skim@pipeline.com Fri Jul 07 01:34:43 1995 Path: ashpoly!cascade!mxgate!coyoacan!pipeline!skim From: skim@pipeline.com (Sergei Kim) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jul07.013443.8871@pipeline.com> Date: Fri, 07 Jul 1995 01:34:43 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). 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. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Sergei Kim -- The Pipeline Internet Network "A soul is not exclusive to biology." From dkang@demon.co.uk Fri Jul 07 15:25:43 1995 Path: ashpoly!cascade!mxgate!coyoacan!demon!dkang From: dkang@demon.co.uk (Dave Kang) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jul07.152543.2704@demon.co.uk> Date: Fri, 07 Jul 1995 15:25:43 GMT References: <1995Jul07.013443.8871@pipeline.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jul07.013443.8871@pipeline.com>, skim@pipeline.com (Sergei Kim) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Dave Kang Opinions expressed are solely my own and not those of Demon Internet Services UK. ------------------------------------------------------------ From mlaurent@uu.net Sat Jul 08 12:00:43 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!uu!mlaurent From: mlaurent@uu.net (Marisol Laurent) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jul08.120043.8327@uu.net> Date: Sat, 08 Jul 1995 12:00:43 GMT References: <1995Jul07.013443.8871@pipeline.com> <1995Jul07.152543.2704@demon.co.uk> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jul07.152543.2704@demon.co.uk>, dkang@demon.co.uk (Dave Kang) 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. -- Marisol Laurent Zyxel U-1496E @ 14,400 bps "A soul is not exclusive to biology."