From mdubois@mindspring.com Sun Sep 11 17:46:01 1994 Path: ashpoly!cascade!mxgate!coyoacan!mindspring!mdubois From: mdubois@mindspring.com (Morag Dubois) Newsgroups: comp.sys.m68k Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Sep11.174601.9080@mindspring.com> Date: Sun, 11 Sep 1994 17:46:01 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 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. 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. -- Morag Dubois | mdubois@mindspring.com PGP Key fingerprint: 0C27 DF6C 7948 0C96 "Keep the channels open." From hmartinez@kth.se Mon Sep 12 21:18:01 1994 Path: ashpoly!cascade!transat!ukc!fennimore!kth!hmartinez From: hmartinez@kth.se (Heather Martínez) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Sep12.211801.5466@kth.se> Date: Mon, 12 Sep 1994 21:18:01 GMT References: <1994Sep11.174601.9080@mindspring.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Sep11.174601.9080@mindspring.com>, mdubois@mindspring.com (Morag Dubois) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Heather Martínez US Robotics Courier V.34 @ 19,200 bps "Hold for relay." From ngonzalez@unam.mx Wed Sep 14 18:35:01 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!ngonzalez From: ngonzalez@unam.mx (Nadine González) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Sep14.183501.5488@unam.mx> Date: Wed, 14 Sep 1994 18:35:01 GMT References: <1994Sep11.174601.9080@mindspring.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Sep11.174601.9080@mindspring.com>, mdubois@mindspring.com (Morag Dubois) 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. -- Nadine González *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From msanchez@clari.net Wed Sep 14 20:37:01 1994 Path: ashpoly!cascade!mxgate!coyoacan!clari!msanchez From: msanchez@clari.net (Morag Sánchez) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Sep14.203701.5929@clari.net> Date: Wed, 14 Sep 1994 20:37:01 GMT References: <1994Sep11.174601.9080@mindspring.com> <1994Sep12.211801.5466@kth.se> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Sep12.211801.5466@kth.se>, hmartinez@kth.se (Heather Martínez) 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. -- === Morag Sánchez === Dept of Electrical Engineering, ClariNet Communications Corp "Hardware is temporary. The signal survives."