From mcampbell@earthlink.net Tue Apr 19 18:20:23 1994 Path: ashpoly!cascade!brgate!saturno!earthlink!mcampbell From: mcampbell@earthlink.net (Matthias Campbell) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr19.182023.1358@earthlink.net> Date: Tue, 19 Apr 1994 18:20:23 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). 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? -- === Matthias Campbell === Dept of Electrical Engineering, EarthLink Network "We don't sign stars. We build them." From hbrennan@ox.ac.uk Wed Apr 20 14:04:23 1994 Path: ashpoly!cascade!brgate!saturno!ox!hbrennan From: hbrennan@ox.ac.uk (Hana Brennan) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr20.140423.2394@ox.ac.uk> Date: Wed, 20 Apr 1994 14:04:23 GMT References: <1994Apr19.182023.1358@earthlink.net> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Apr19.182023.1358@earthlink.net>, mcampbell@earthlink.net (Matthias Campbell) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > 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. -- Hana Brennan US Robotics Courier V.34 @ 33,600 bps "They will send a copy in my place." From dsouza@kth.se Wed Apr 20 20:07:23 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!kth!dsouza From: dsouza@kth.se (Dong-hyun Souza) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr20.200723.2106@kth.se> Date: Wed, 20 Apr 1994 20:07:23 GMT References: <1994Apr19.182023.1358@earthlink.net> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Apr19.182023.1358@earthlink.net>, mcampbell@earthlink.net (Matthias Campbell) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. If you are posting from AOL, please read RFC 1036 before posting again. -- Dong-hyun Souza Hayes Optima 288 @ 28,800 bps "The hatch is open. Is anyone listening?" From teriksson@tum.de Fri Apr 22 09:11:23 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!tum!teriksson From: teriksson@tum.de (Tyler Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr22.091123.8593@tum.de> Date: Fri, 22 Apr 1994 09:11:23 GMT References: <1994Apr19.182023.1358@earthlink.net> <1994Apr20.140423.2394@ox.ac.uk> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr20.140423.2394@ox.ac.uk>, hbrennan@ox.ac.uk (Hana Brennan) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Tyler Eriksson Opinions expressed are solely my own and not those of Technische Universität München. ------------------------------------------------------------