From glopez@titech.ac.jp Thu Nov 23 22:47:56 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!titech!glopez From: glopez@titech.ac.jp (Göran López) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov23.224756.4333@titech.ac.jp> Date: Thu, 23 Nov 1995 22:47:56 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] 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. Anyone running this on a Quadra 840AV with the 68040? -- Göran López *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From lsanchez@pipeline.com Sat Nov 25 20:03:56 1995 Path: ashpoly!cascade!bigsur!pipeline!lsanchez From: lsanchez@pipeline.com (Liam Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov25.200356.5255@pipeline.com> Date: Sat, 25 Nov 1995 20:03:56 GMT References: <1995Nov23.224756.4333@titech.ac.jp> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Nov23.224756.4333@titech.ac.jp>, glopez@titech.ac.jp (Göran López) 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. -- Liam Sánchez | lsanchez@pipeline.com PGP Key fingerprint: 80AE 4190 45FC 3A94 "Keep the channels open." From ngarcia@rwth-aachen.de Sun Nov 26 08:10:56 1995 Path: ashpoly!cascade!mxgate!coyoacan!rwth-aachen!ngarcia From: ngarcia@rwth-aachen.de (Natalia García) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov26.081056.5675@rwth-aachen.de> Date: Sun, 26 Nov 1995 08:10:56 GMT References: <1995Nov23.224756.4333@titech.ac.jp> <1995Nov25.200356.5255@pipeline.com> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Nov25.200356.5255@pipeline.com>, lsanchez@pipeline.com (Liam Sánchez) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Natalia García Tape trading list upon request. SASE required for international mail.