From bmacdonald@kth.se Sun Jan 15 10:52:27 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kth!bmacdonald From: bmacdonald@kth.se (Bruno MacDonald) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan15.105227.8372@kth.se> Date: Sun, 15 Jan 1995 10:52:27 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Bruno MacDonald "Measuring a record you own is listening, not piracy." Atari TT030 / SunOS 4.1.4 From hhughes@earthlink.net Sun Jan 15 19:42:27 1995 Path: ashpoly!cascade!bigsur!earthlink!hhughes From: hhughes@earthlink.net (Heather Hughes) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan15.194227.4832@earthlink.net> Date: Sun, 15 Jan 1995 19:42:27 GMT References: <1995Jan15.105227.8372@kth.se> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jan15.105227.8372@kth.se>, bmacdonald@kth.se (Bruno MacDonald) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Heather Hughes Tape trading list upon request. SASE required for international mail. From cstewart@illinois.edu Mon Jan 16 04:02:27 1995 Path: ashpoly!cascade!bigsur!illinois!cstewart From: cstewart@illinois.edu (Camila Stewart) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan16.040227.7547@illinois.edu> Date: Mon, 16 Jan 1995 04:02:27 GMT References: <1995Jan15.105227.8372@kth.se> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan15.105227.8372@kth.se>, bmacdonald@kth.se (Bruno MacDonald) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Camila Stewart Tape trading list upon request. SASE required for international mail. From ewatanabe@titech.ac.jp Mon Jan 16 17:08:27 1995 Path: ashpoly!cascade!bigsur!titech!ewatanabe From: ewatanabe@titech.ac.jp (Elaine Watanabe) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan16.170827.4847@titech.ac.jp> Date: Mon, 16 Jan 1995 17:08:27 GMT References: <1995Jan15.105227.8372@kth.se> <1995Jan15.194227.4832@earthlink.net> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Jan15.194227.4832@earthlink.net>, hhughes@earthlink.net (Heather Hughes) 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. Top-posters will be placed in my ~/.killfile without notice. -- Elaine Watanabe | ewatanabe@titech.ac.jp PGP Key fingerprint: F9B4 5CD7 7E72 C555 "Keep the channels open."