From ddubois@earthlink.net Fri Apr 28 09:19:24 1995 Path: ashpoly!cascade!bigsur!earthlink!ddubois From: ddubois@earthlink.net (Dong-hyun Dubois) Newsgroups: comp.sys.m68k Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr28.091924.2571@earthlink.net> Date: Fri, 28 Apr 1995 09:19:24 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N 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. -- Dong-hyun Dubois "Measuring a record you own is listening, not piracy." 486DX4/100 (FreeBSD 2.0.5) / Linux 1.2.13 From jcampbell@kth.se Fri Apr 28 16:32:24 1995 Path: ashpoly!cascade!bigsur!kth!jcampbell From: jcampbell@kth.se (Julien Campbell) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr28.163224.7859@kth.se> Date: Fri, 28 Apr 1995 16:32:24 GMT References: <1995Apr28.091924.2571@earthlink.net> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Apr28.091924.2571@earthlink.net>, ddubois@earthlink.net (Dong-hyun 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. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. PGP Public key available via finger or upon request. -- Julien Campbell -- Royal Institute of Technology, Stockholm "They will send a copy in my place." From tstewart@uu.net Sun Apr 30 00:55:24 1995 Path: ashpoly!cascade!mxgate!coyoacan!uu!tstewart From: tstewart@uu.net (Tyler Stewart) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr30.005524.7645@uu.net> Date: Sun, 30 Apr 1995 00:55:24 GMT References: <1995Apr28.091924.2571@earthlink.net> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr28.091924.2571@earthlink.net>, ddubois@earthlink.net (Dong-hyun Dubois) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Tyler Stewart | tstewart@uu.net PGP Key fingerprint: 1D83 3054 4969 03B5 "Keep the channels open." From nrodriguez@clari.net Sun Apr 30 02:03:24 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!clari!nrodriguez From: nrodriguez@clari.net (Natalia Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr30.020324.8928@clari.net> Date: Sun, 30 Apr 1995 02:03:24 GMT References: <1995Apr28.091924.2571@earthlink.net> <1995Apr30.005524.7645@uu.net> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Apr30.005524.7645@uu.net>, tstewart@uu.net (Tyler Stewart) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. 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. -- Natalia Rodríguez *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0