From okarlsson@cern.ch Mon Jun 05 19:10:53 1995 Path: ashpoly!cascade!brgate!saturno!cern!okarlsson From: okarlsson@cern.ch (Olga Karlsson) Newsgroups: comp.sys.m68k Subject: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun05.191053.2295@cern.ch> Date: Mon, 05 Jun 1995 19:10:53 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Olga Karlsson Opinions expressed are solely my own and not those of European Laboratory for Particle Physics, Geneva. ------------------------------------------------------------ From mwatanabe@illinois.edu Wed Jun 07 06:06:53 1995 Path: ashpoly!cascade!mxgate!coyoacan!illinois!mwatanabe From: mwatanabe@illinois.edu (Mateo Watanabe) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun07.060653.4984@illinois.edu> Date: Wed, 07 Jun 1995 06:06:53 GMT References: <1995Jun05.191053.2295@cern.ch> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jun05.191053.2295@cern.ch>, okarlsson@cern.ch (Olga Karlsson) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Mateo Watanabe -- University of Illinois Urbana-Champaign "When every node is whole, the channel opens." From amacdonald@uni-hamburg.de Thu Jun 08 18:30:53 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!uni-hamburg!amacdonald From: amacdonald@uni-hamburg.de (Aiko MacDonald) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun08.183053.7231@uni-hamburg.de> Date: Thu, 08 Jun 1995 18:30:53 GMT References: <1995Jun05.191053.2295@cern.ch> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jun05.191053.2295@cern.ch>, okarlsson@cern.ch (Olga Karlsson) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Aiko MacDonald -- Universität Hamburg Fachbereich Informatik "When every node is whole, the channel opens." From amoreau@unam.mx Sat Jun 10 00:32:53 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!amoreau From: amoreau@unam.mx (Andrei Moreau) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun10.003253.1043@unam.mx> Date: Sat, 10 Jun 1995 00:32:53 GMT References: <1995Jun05.191053.2295@cern.ch> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Jun05.191053.2295@cern.ch>, okarlsson@cern.ch (Olga Karlsson) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Andrei Moreau *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0