From msmirnov@u-tokyo.ac.jp Thu Jul 11 01:15:55 1996 Path: ashpoly!cascade!brgate!saturno!u-tokyo!msmirnov From: msmirnov@u-tokyo.ac.jp (Marisol Smirnov) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul11.011555.6090@u-tokyo.ac.jp> Date: Thu, 11 Jul 1996 01:15:55 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. 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? -- Marisol Smirnov -- University of Tokyo Department of Information Science "In theory there is no difference between theory and practice." From enakamura@pacbell.net Fri Jul 12 22:26:55 1996 Path: ashpoly!cascade!transat!ukc!fennimore!pacbell!enakamura From: enakamura@pacbell.net (Élodie Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul12.222655.8325@pacbell.net> Date: Fri, 12 Jul 1996 22:26:55 GMT References: <1996Jul11.011555.6090@u-tokyo.ac.jp> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Jul11.011555.6090@u-tokyo.ac.jp>, msmirnov@u-tokyo.ac.jp (Marisol Smirnov) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Élodie Nakamura *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From tlarsson@hanse.de Sat Jul 13 02:13:55 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!hanse!tlarsson From: tlarsson@hanse.de (Tomas Larsson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul13.021355.7637@hanse.de> Date: Sat, 13 Jul 1996 02:13:55 GMT References: <1996Jul11.011555.6090@u-tokyo.ac.jp> <1996Jul12.222655.8325@pacbell.net> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jul12.222655.8325@pacbell.net>, enakamura@pacbell.net (Élodie Nakamura) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Tomas Larsson | tlarsson@hanse.de PGP Key fingerprint: C37E 31CB 76F8 F18F "Keep the channels open." From jkim@cern.ch Sun Jul 14 23:08:55 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!cern!jkim From: jkim@cern.ch (Jens Kim) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul14.230855.9925@cern.ch> Date: Sun, 14 Jul 1996 23:08:55 GMT References: <1996Jul11.011555.6090@u-tokyo.ac.jp> <1996Jul12.222655.8325@pacbell.net> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Jul12.222655.8325@pacbell.net>, enakamura@pacbell.net (Élodie Nakamura) 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. -- Jens Kim US Robotics Courier V.34 @ 19,200 bps "The carrier frequency does not drift by accident."