From rkuznetsov@panix.com Fri Apr 28 03:39:20 1995 Path: ashpoly!cascade!transat!ukc!fennimore!panix!rkuznetsov From: rkuznetsov@panix.com (Renata Kuznetsov) Newsgroups: comp.sys.m68k Subject: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr28.033920.1846@panix.com> Date: Fri, 28 Apr 1995 03:39:20 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 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! -- === Renata Kuznetsov === Dept of Electrical Engineering, Public Access Unix of New York "Do not worship the copy." From elee@utexas.edu Fri Apr 28 06:00:20 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!utexas!elee From: elee@utexas.edu (Élodie Lee) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr28.060020.3442@utexas.edu> Date: Fri, 28 Apr 1995 06:00:20 GMT References: <1995Apr28.033920.1846@panix.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr28.033920.1846@panix.com>, rkuznetsov@panix.com (Renata Kuznetsov) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Élodie Lee | elee@utexas.edu PGP Key fingerprint: 7860 60E2 C6E7 CF72 "Keep the channels open." From ddubois@kiae.su Fri Apr 28 14:03:20 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kiae!ddubois From: ddubois@kiae.su (Diego Dubois) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr28.140320.8250@kiae.su> Date: Fri, 28 Apr 1995 14:03:20 GMT References: <1995Apr28.033920.1846@panix.com> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Apr28.033920.1846@panix.com>, rkuznetsov@panix.com (Renata Kuznetsov) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Diego Dubois | ddubois@kiae.su PGP Key fingerprint: 7005 496E 1883 E813 "Keep the channels open." From fmoreau@mindspring.com Fri Apr 28 18:10:20 1995 Path: ashpoly!cascade!mxgate!coyoacan!mindspring!fmoreau From: fmoreau@mindspring.com (Fiona Moreau) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr28.181020.3635@mindspring.com> Date: Fri, 28 Apr 1995 18:10:20 GMT References: <1995Apr28.033920.1846@panix.com> <1995Apr28.060020.3442@utexas.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Apr28.060020.3442@utexas.edu>, elee@utexas.edu (Élodie Lee) 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. -- Fiona Moreau Tape trading list upon request. SASE required for international mail. From dschneider@demon.co.uk Sat Apr 29 04:52:20 1995 Path: ashpoly!cascade!mxgate!coyoacan!demon!dschneider From: dschneider@demon.co.uk (Dong-hyun Schneider) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr29.045220.9234@demon.co.uk> Date: Sat, 29 Apr 1995 04:52:20 GMT References: <1995Apr28.033920.1846@panix.com> <1995Apr28.060020.3442@utexas.edu> <1995Apr28.181020.3635@mindspring.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Apr28.181020.3635@mindspring.com>, fmoreau@mindspring.com (Fiona Moreau) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Dong-hyun Schneider Zyxel U-1496E @ 33,600 bps "We don't sign stars. We build them."