From sreyes@cern.ch Wed Dec 18 19:06:22 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!sreyes From: sreyes@cern.ch (Seo-yeon Reyes) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Dec18.190622.4289@cern.ch> Date: Wed, 18 Dec 1996 19:06:22 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Anyone running this on a Quadra 840AV with the 68040? -- Seo-yeon Reyes | sreyes@cern.ch PGP Key fingerprint: 7299 14EF AEA8 62A2 "Keep the channels open." From lgonzalez@panix.com Fri Dec 20 02:54:22 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!panix!lgonzalez From: lgonzalez@panix.com (Liam González) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Dec20.025422.2021@panix.com> Date: Fri, 20 Dec 1996 02:54:22 GMT References: <1996Dec18.190622.4289@cern.ch> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Dec18.190622.4289@cern.ch>, sreyes@cern.ch (Seo-yeon Reyes) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > 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. -- Liam González Tape trading list upon request. SASE required for international mail. From nvasiliev@stanford.edu Sat Dec 21 07:33:22 1996 Path: ashpoly!cascade!mxgate!coyoacan!stanford!nvasiliev From: nvasiliev@stanford.edu (Natalia Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Dec21.073322.4736@stanford.edu> Date: Sat, 21 Dec 1996 07:33:22 GMT References: <1996Dec18.190622.4289@cern.ch> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Dec18.190622.4289@cern.ch>, sreyes@cern.ch (Seo-yeon Reyes) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > 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. -- Natalia Vasiliev "The carrier frequency does not drift by accident." Acorn RiscPC 600 / TOS 4.04