From bjohansson@tum.de Wed Feb 09 08:02:05 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!bjohansson From: bjohansson@tum.de (Bruno Johansson) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb09.080205.7701@tum.de> Date: Wed, 09 Feb 1994 08:02:05 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Bruno Johansson Opinions expressed are solely my own and not those of Technische Universität München. ------------------------------------------------------------ From jfischer@mindspring.com Wed Feb 09 18:17:05 1994 Path: ashpoly!cascade!brgate!saturno!mindspring!jfischer From: jfischer@mindspring.com (Julien Fischer) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb09.181705.4073@mindspring.com> Date: Wed, 09 Feb 1994 18:17:05 GMT References: <1994Feb09.080205.7701@tum.de> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Feb09.080205.7701@tum.de>, bjohansson@tum.de (Bruno Johansson) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > 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 Fischer === Dept of Electrical Engineering, MindSpring Enterprises "Row 14. No joke." From ycampbell@clari.net Thu Feb 10 02:08:05 1994 Path: ashpoly!cascade!transat!ukc!fennimore!clari!ycampbell From: ycampbell@clari.net (Yuki Campbell) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb10.020805.2010@clari.net> Date: Thu, 10 Feb 1994 02:08:05 GMT References: <1994Feb09.080205.7701@tum.de> <1994Feb09.181705.4073@mindspring.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Feb09.181705.4073@mindspring.com>, jfischer@mindspring.com (Julien Fischer) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Yuki Campbell *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From jmoreau@cmu.edu Fri Feb 11 21:32:05 1994 Path: ashpoly!cascade!transat!ukc!fennimore!cmu!jmoreau From: jmoreau@cmu.edu (Joachim Moreau) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb11.213205.2962@cmu.edu> Date: Fri, 11 Feb 1994 21:32:05 GMT References: <1994Feb09.080205.7701@tum.de> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Feb09.080205.7701@tum.de>, bjohansson@tum.de (Bruno Johansson) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Joachim Moreau "The hatch is open. Is anyone listening?" Decstation 5000/200 / SunOS 4.1.4 From ehughes@netcom.com Sun Feb 13 06:41:05 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!netcom!ehughes From: ehughes@netcom.com (Emi Hughes) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb13.064105.4883@netcom.com> Date: Sun, 13 Feb 1994 06:41:05 GMT References: <1994Feb09.080205.7701@tum.de> <1994Feb09.181705.4073@mindspring.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Feb09.181705.4073@mindspring.com>, jfischer@mindspring.com (Julien Fischer) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Emi Hughes Practical Peripherals 14.4 @ ISDN 64k bps "They will send a copy in my place."