From dfournier@mit.edu Fri Feb 03 19:59:49 1995 Path: ashpoly!cascade!bigsur!mit!dfournier From: dfournier@mit.edu (Dong-hyun Fournier) Newsgroups: comp.sys.m68k Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb03.195949.2989@mit.edu> Date: Fri, 03 Feb 1995 19:59:49 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu 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. 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? -- Dong-hyun Fournier "Hardware is temporary. The signal survives." Atari Falcon 030 / SunOS 4.1.4 From jlee@mindspring.com Sat Feb 04 14:01:49 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!mindspring!jlee From: jlee@mindspring.com (Jen Lee) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb04.140149.7579@mindspring.com> Date: Sat, 04 Feb 1995 14:01:49 GMT References: <1995Feb03.195949.2989@mit.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Feb03.195949.2989@mit.edu>, dfournier@mit.edu (Dong-hyun Fournier) 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. -- Jen Lee Tape trading list upon request. SASE required for international mail. From egirard@ox.ac.uk Mon Feb 06 04:02:49 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!ox!egirard From: egirard@ox.ac.uk (Emi Girard) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb06.040249.5881@ox.ac.uk> Date: Mon, 06 Feb 1995 04:02:49 GMT References: <1995Feb03.195949.2989@mit.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Feb03.195949.2989@mit.edu>, dfournier@mit.edu (Dong-hyun Fournier) 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. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Emi Girard Opinions expressed are solely my own and not those of Oxford University Computing Laboratory. ------------------------------------------------------------ From sreyes@cmu.edu Mon Feb 06 16:33:49 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cmu!sreyes From: sreyes@cmu.edu (Sven Reyes) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb06.163349.4331@cmu.edu> Date: Mon, 06 Feb 1995 16:33:49 GMT References: <1995Feb03.195949.2989@mit.edu> <1995Feb04.140149.7579@mindspring.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Feb04.140149.7579@mindspring.com>, jlee@mindspring.com (Jen Lee) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Sven Reyes *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0