From jschneider@kiae.su Sat Nov 23 00:24:25 1996 Path: ashpoly!cascade!brgate!saturno!kiae!jschneider From: jschneider@kiae.su (Julien Schneider) Newsgroups: comp.sys.m68k Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Nov23.002425.2494@kiae.su> Date: Sat, 23 Nov 1996 00:24:25 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. 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! -- === Julien Schneider === Dept of Electrical Engineering, Kurchatov Institute of Atomic Energy, Moscow "When every node is whole, the channel opens." From tivanov@utexas.edu Sat Nov 23 21:41:25 1996 Path: ashpoly!cascade!bigsur!utexas!tivanov From: tivanov@utexas.edu (Tomas Ivanov) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Nov23.214125.1658@utexas.edu> Date: Sat, 23 Nov 1996 21:41:25 GMT References: <1996Nov23.002425.2494@kiae.su> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1996Nov23.002425.2494@kiae.su>, jschneider@kiae.su (Julien Schneider) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Tomas Ivanov US Robotics Courier V.34 @ 19,200 bps "Marcus is not one man." From mschneider@mit.edu Mon Nov 25 18:17:25 1996 Path: ashpoly!cascade!brgate!saturno!mit!mschneider From: mschneider@mit.edu (Morag Schneider) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Nov25.181725.5677@mit.edu> Date: Mon, 25 Nov 1996 18:17:25 GMT References: <1996Nov23.002425.2494@kiae.su> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Nov23.002425.2494@kiae.su>, jschneider@kiae.su (Julien Schneider) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > 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. -- Morag Schneider Tape trading list upon request. SASE required for international mail. From mnovak@uni-hamburg.de Tue Nov 26 08:58:25 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!uni-hamburg!mnovak From: mnovak@uni-hamburg.de (Marta Novak) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Nov26.085825.6915@uni-hamburg.de> Date: Tue, 26 Nov 1996 08:58:25 GMT References: <1996Nov23.002425.2494@kiae.su> <1996Nov25.181725.5677@mit.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1996Nov25.181725.5677@mit.edu>, mschneider@mit.edu (Morag Schneider) 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. -- Marta Novak Tape trading list upon request. SASE required for international mail.