From skim@pacbell.net Tue Mar 01 07:11:36 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pacbell!skim From: skim@pacbell.net (Steve Kim) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar01.071136.6976@pacbell.net> Date: Tue, 01 Mar 1994 07:11:36 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N 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. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Steve Kim "Hardware is temporary. The signal survives." 486DX4/100 (FreeBSD 2.0.5) / NEXTSTEP 3.3 From rsouza@u-tokyo.ac.jp Wed Mar 02 17:17:36 1994 Path: ashpoly!cascade!mxgate!coyoacan!u-tokyo!rsouza From: rsouza@u-tokyo.ac.jp (Raj Souza) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar02.171736.5119@u-tokyo.ac.jp> Date: Wed, 02 Mar 1994 17:17:36 GMT References: <1994Mar01.071136.6976@pacbell.net> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Mar01.071136.6976@pacbell.net>, skim@pacbell.net (Steve 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. -- === Raj Souza === Dept of Electrical Engineering, University of Tokyo Department of Information Science "We don't sign stars. We build them." From tstewart@tum.de Wed Mar 02 23:39:36 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!tum!tstewart From: tstewart@tum.de (Tomas Stewart) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar02.233936.5635@tum.de> Date: Wed, 02 Mar 1994 23:39:36 GMT References: <1994Mar01.071136.6976@pacbell.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Mar01.071136.6976@pacbell.net>, skim@pacbell.net (Steve Kim) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Tomas Stewart -- Technische Universität München "5 sigma is a discovery. 7 is a question."