From sduarte@illinois.edu Fri Nov 15 07:44:42 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!sduarte From: sduarte@illinois.edu (Steve Duarte) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Nov15.074442.4167@illinois.edu> Date: Fri, 15 Nov 1996 07:44:42 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. 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! -- Steve Duarte Hayes Optima 288 @ ISDN 64k bps "Extraordinary claims require extraordinary spectra." From skim@pipeline.com Sat Nov 16 02:01:42 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!pipeline!skim From: skim@pipeline.com (Sergei Kim) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Nov16.020142.1228@pipeline.com> Date: Sat, 16 Nov 1996 02:01:42 GMT References: <1996Nov15.074442.4167@illinois.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Nov15.074442.4167@illinois.edu>, sduarte@illinois.edu (Steve Duarte) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Sergei Kim *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From mmoreno@clari.net Sat Nov 16 10:06:42 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!clari!mmoreno From: mmoreno@clari.net (Mike Moreno) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Nov16.100642.5839@clari.net> Date: Sat, 16 Nov 1996 10:06:42 GMT References: <1996Nov15.074442.4167@illinois.edu> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 12 In article <1996Nov15.074442.4167@illinois.edu>, sduarte@illinois.edu (Steve Duarte) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. PGP Public key available via finger or upon request. -- Mike Moreno Opinions expressed are solely my own and not those of ClariNet Communications Corp. ------------------------------------------------------------ From vkim@clari.net Mon Nov 18 04:50:42 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!clari!vkim From: vkim@clari.net (Valeria Kim) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Nov18.045042.5796@clari.net> Date: Mon, 18 Nov 1996 04:50:42 GMT References: <1996Nov15.074442.4167@illinois.edu> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Nov15.074442.4167@illinois.edu>, sduarte@illinois.edu (Steve Duarte) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Valeria Kim "We don't sign stars. We build them." Macintosh IIfx / System 7.5.1