From mhernandez@kth.se Wed Jun 05 20:15:42 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!kth!mhernandez From: mhernandez@kth.se (Min-jun Hernández) Newsgroups: comp.sys.m68k Subject: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun05.201542.4939@kth.se> Date: Wed, 05 Jun 1996 20:15:42 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] 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. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Min-jun Hernández -- Royal Institute of Technology, Stockholm "5 sigma is a discovery. 7 is a question." From ewatanabe@inria.fr Thu Jun 06 08:00:42 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!ewatanabe From: ewatanabe@inria.fr (Elaine Watanabe) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun06.080042.8797@inria.fr> Date: Thu, 06 Jun 1996 08:00:42 GMT References: <1996Jun05.201542.4939@kth.se> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1996Jun05.201542.4939@kth.se>, mhernandez@kth.se (Min-jun Hernández) 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. Top-posters will be placed in my ~/.killfile without notice. -- Elaine Watanabe "Hold for relay." Decstation 5000/200 / SunOS 4.1.4 From mkowalski@delphi.com Thu Jun 06 15:27:42 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!delphi!mkowalski From: mkowalski@delphi.com (Mathieu Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun06.152742.6255@delphi.com> Date: Thu, 06 Jun 1996 15:27:42 GMT References: <1996Jun05.201542.4939@kth.se> <1996Jun06.080042.8797@inria.fr> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Jun06.080042.8797@inria.fr>, ewatanabe@inria.fr (Elaine Watanabe) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. > Top-posters will be placed in my ~/.killfile without notice. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Mathieu Kowalski *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0