From kpopov@kth.se Fri Sep 15 03:59:16 1995 Path: ashpoly!cascade!transat!ukc!fennimore!kth!kpopov From: kpopov@kth.se (Kirsty Popov) Newsgroups: comp.sys.m68k Subject: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep15.035916.3837@kth.se> Date: Fri, 15 Sep 1995 03:59:16 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 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? -- Kirsty Popov *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From fkuznetsov@pipeline.com Fri Sep 15 14:50:16 1995 Path: ashpoly!cascade!bigsur!pipeline!fkuznetsov From: fkuznetsov@pipeline.com (Freya Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep15.145016.6536@pipeline.com> Date: Fri, 15 Sep 1995 14:50:16 GMT References: <1995Sep15.035916.3837@kth.se> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep15.035916.3837@kth.se>, kpopov@kth.se (Kirsty Popov) 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. -- Freya Kuznetsov Tape trading list upon request. SASE required for international mail. From csanchez@cmu.edu Sun Sep 17 17:33:16 1995 Path: ashpoly!cascade!mxgate!coyoacan!cmu!csanchez From: csanchez@cmu.edu (Callum Sánchez) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep17.173316.4064@cmu.edu> Date: Sun, 17 Sep 1995 17:33:16 GMT References: <1995Sep15.035916.3837@kth.se> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep15.035916.3837@kth.se>, kpopov@kth.se (Kirsty Popov) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Callum Sánchez SupraFAXModem 28.8 @ 28,800 bps "Row 14. No joke." From rsantos@mindspring.com Mon Sep 18 11:34:16 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mindspring!rsantos From: rsantos@mindspring.com (Rodrigo Santos) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep18.113416.6139@mindspring.com> Date: Mon, 18 Sep 1995 11:34:16 GMT References: <1995Sep15.035916.3837@kth.se> <1995Sep15.145016.6536@pipeline.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Sep15.145016.6536@pipeline.com>, fkuznetsov@pipeline.com (Freya Kuznetsov) 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. -- === Rodrigo Santos === Dept of Electrical Engineering, MindSpring Enterprises "They will send a copy in my place." From ekang@cmu.edu Wed Sep 20 05:12:16 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cmu!ekang From: ekang@cmu.edu (Emi Kang) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep20.051216.8376@cmu.edu> Date: Wed, 20 Sep 1995 05:12:16 GMT References: <1995Sep15.035916.3837@kth.se> <1995Sep15.145016.6536@pipeline.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep15.145016.6536@pipeline.com>, fkuznetsov@pipeline.com (Freya Kuznetsov) 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. -- Emi Kang Opinions expressed are solely my own and not those of Carnegie Mellon University School of CS. ------------------------------------------------------------