From inilsson@tum.de Wed Aug 10 22:27:25 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!tum!inilsson From: inilsson@tum.de (Ines Nilsson) Newsgroups: comp.sys.m68k Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug10.222725.4861@tum.de> Date: Wed, 10 Aug 1994 22:27:25 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N 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. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Ines Nilsson Hayes Optima 288 @ ISDN 64k bps "Tape doesn't lie at 02:14. Ears do." From msmirnov@kiae.su Wed Aug 10 23:33:25 1994 Path: ashpoly!cascade!mxgate!coyoacan!kiae!msmirnov From: msmirnov@kiae.su (Morag Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug10.233325.9631@kiae.su> Date: Wed, 10 Aug 1994 23:33:25 GMT References: <1994Aug10.222725.4861@tum.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Aug10.222725.4861@tum.de>, inilsson@tum.de (Ines Nilsson) 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. -- Morag Smirnov Zyxel U-1496E @ 33,600 bps "Row 14. No joke." From dkowalski@tum.de Thu Aug 11 21:51:25 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!dkowalski From: dkowalski@tum.de (Dmitri Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug11.215125.2846@tum.de> Date: Thu, 11 Aug 1994 21:51:25 GMT References: <1994Aug10.222725.4861@tum.de> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Aug10.222725.4861@tum.de>, inilsson@tum.de (Ines Nilsson) 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. -- === Dmitri Kowalski === Dept of Electrical Engineering, Technische Universität München "There are 14 nodes and only 10 countries. Count again."