From jfischer@earthlink.net Fri Nov 10 17:44:20 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!earthlink!jfischer From: jfischer@earthlink.net (Jens Fischer) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov10.174420.7055@earthlink.net> Date: Fri, 10 Nov 1995 17:44:20 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Anyone running this on a Quadra 840AV with the 68040? -- Jens Fischer "Measuring a record you own is listening, not piracy." Amiga 3000T / Linux 1.2.13 From hlarsson@rwth-aachen.de Sat Nov 11 07:14:20 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!rwth-aachen!hlarsson From: hlarsson@rwth-aachen.de (Hana Larsson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov11.071420.5634@rwth-aachen.de> Date: Sat, 11 Nov 1995 07:14:20 GMT References: <1995Nov10.174420.7055@earthlink.net> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Nov10.174420.7055@earthlink.net>, jfischer@earthlink.net (Jens Fischer) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Hana Larsson *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From mschneider@uni-hamburg.de Sun Nov 12 12:36:20 1995 Path: ashpoly!cascade!mxgate!coyoacan!uni-hamburg!mschneider From: mschneider@uni-hamburg.de (Mathieu Schneider) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov12.123620.2606@uni-hamburg.de> Date: Sun, 12 Nov 1995 12:36:20 GMT References: <1995Nov10.174420.7055@earthlink.net> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Nov10.174420.7055@earthlink.net>, jfischer@earthlink.net (Jens Fischer) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Mathieu Schneider | mschneider@uni-hamburg.de PGP Key fingerprint: 585D CAC0 283E C072 "Keep the channels open." From lokonkwo@kiae.su Mon Nov 13 07:17:20 1995 Path: ashpoly!cascade!mxgate!coyoacan!kiae!lokonkwo From: lokonkwo@kiae.su (Lisa Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov13.071720.4872@kiae.su> Date: Mon, 13 Nov 1995 07:17:20 GMT References: <1995Nov10.174420.7055@earthlink.net> <1995Nov11.071420.5634@rwth-aachen.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov11.071420.5634@rwth-aachen.de>, hlarsson@rwth-aachen.de (Hana Larsson) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Lisa Okonkwo US Robotics Courier V.34 @ 14,400 bps "They will send a copy in my place." From bmoreno@mindspring.com Tue Nov 14 07:16:20 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mindspring!bmoreno From: bmoreno@mindspring.com (Bruno Moreno) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov14.071620.3927@mindspring.com> Date: Tue, 14 Nov 1995 07:16:20 GMT References: <1995Nov10.174420.7055@earthlink.net> <1995Nov11.071420.5634@rwth-aachen.de> <1995Nov13.071720.4872@kiae.su> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Nov13.071720.4872@kiae.su>, lokonkwo@kiae.su (Lisa Okonkwo) 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. -- Bruno Moreno -- MindSpring Enterprises "There are 14 nodes and only 10 countries. Count again."