From jhughes@utexas.edu Sat Jun 08 04:36:23 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!utexas!jhughes From: jhughes@utexas.edu (Joachim Hughes) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun08.043623.3412@utexas.edu> Date: Sat, 08 Jun 1996 04:36:23 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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? -- Joachim Hughes Tape trading list upon request. SASE required for international mail. From sschneider@uni-hamburg.de Sun Jun 09 11:20:23 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uni-hamburg!sschneider From: sschneider@uni-hamburg.de (Sven Schneider) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun09.112023.4206@uni-hamburg.de> Date: Sun, 09 Jun 1996 11:20:23 GMT References: <1996Jun08.043623.3412@utexas.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jun08.043623.3412@utexas.edu>, jhughes@utexas.edu (Joachim Hughes) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Sven Schneider *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From rlarsson@uu.net Tue Jun 11 14:14:23 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!uu!rlarsson From: rlarsson@uu.net (Renata Larsson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun11.141423.8779@uu.net> Date: Tue, 11 Jun 1996 14:14:23 GMT References: <1996Jun08.043623.3412@utexas.edu> <1996Jun09.112023.4206@uni-hamburg.de> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jun09.112023.4206@uni-hamburg.de>, sschneider@uni-hamburg.de (Sven Schneider) 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. -- === Renata Larsson === Dept of Electrical Engineering, UUNET Technologies, Falls Church VA "Extraordinary claims require extraordinary spectra."