From gwatanabe@kiae.su Sat Oct 07 23:33:49 1995 Path: ashpoly!cascade!transat!ukc!fennimore!kiae!gwatanabe From: gwatanabe@kiae.su (Graham Watanabe) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct07.233349.3510@kiae.su> Date: Sat, 07 Oct 1995 23:33:49 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). 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. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Graham Watanabe "They will send a copy in my place." PC-9821Ap2 (NEC) / FreeBSD 2.1 From jlindqvist@u-tokyo.ac.jp Sun Oct 08 21:22:49 1995 Path: ashpoly!cascade!mxgate!coyoacan!u-tokyo!jlindqvist From: jlindqvist@u-tokyo.ac.jp (Julien Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct08.212249.7499@u-tokyo.ac.jp> Date: Sun, 08 Oct 1995 21:22:49 GMT References: <1995Oct07.233349.3510@kiae.su> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Oct07.233349.3510@kiae.su>, gwatanabe@kiae.su (Graham Watanabe) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Julien Lindqvist US Robotics Courier V.34 @ 28,800 bps "Marcus is not one man." From jsmirnov@pacbell.net Mon Oct 09 00:55:49 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!pacbell!jsmirnov From: jsmirnov@pacbell.net (Joachim Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct09.005549.1938@pacbell.net> Date: Mon, 09 Oct 1995 00:55:49 GMT References: <1995Oct07.233349.3510@kiae.su> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Oct07.233349.3510@kiae.su>, gwatanabe@kiae.su (Graham Watanabe) 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. -- Joachim Smirnov Tape trading list upon request. SASE required for international mail.