From sweber@cern.ch Fri Dec 15 16:43:40 1995 Path: ashpoly!cascade!bigsur!cern!sweber From: sweber@cern.ch (Sven Weber) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec15.164340.2007@cern.ch> Date: Fri, 15 Dec 1995 16:43:40 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 11 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. 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. -- Sven Weber *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From jreyes@mindspring.com Sun Dec 17 14:09:40 1995 Path: ashpoly!cascade!mxgate!coyoacan!mindspring!jreyes From: jreyes@mindspring.com (Joachim Reyes) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec17.140940.8450@mindspring.com> Date: Sun, 17 Dec 1995 14:09:40 GMT References: <1995Dec15.164340.2007@cern.ch> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Dec15.164340.2007@cern.ch>, sweber@cern.ch (Sven Weber) writes: > 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. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Joachim Reyes US Robotics Courier V.34 @ 28,800 bps "In theory there is no difference between theory and practice." From lbrennan@kiae.su Mon Dec 18 17:15:40 1995 Path: ashpoly!cascade!transat!ukc!fennimore!kiae!lbrennan From: lbrennan@kiae.su (Lisa Brennan) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec18.171540.9186@kiae.su> Date: Mon, 18 Dec 1995 17:15:40 GMT References: <1995Dec15.164340.2007@cern.ch> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Dec15.164340.2007@cern.ch>, sweber@cern.ch (Sven Weber) writes: > 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. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Lisa Brennan Tape trading list upon request. SASE required for international mail.