From rmoreno@kth.se Sun Jan 15 01:20:26 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!kth!rmoreno From: rmoreno@kth.se (Raj Moreno) Newsgroups: comp.sys.m68k Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan15.012026.7465@kth.se> Date: Sun, 15 Jan 1995 01:20:26 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se 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. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Raj Moreno "A soul is not exclusive to biology." Decstation 5000/200 / NEXTSTEP 3.3 From ngirard@uu.net Mon Jan 16 14:07:26 1995 Path: ashpoly!cascade!brgate!saturno!uu!ngirard From: ngirard@uu.net (Nadia Girard) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan16.140726.4876@uu.net> Date: Mon, 16 Jan 1995 14:07:26 GMT References: <1995Jan15.012026.7465@kth.se> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Jan15.012026.7465@kth.se>, rmoreno@kth.se (Raj Moreno) 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. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Nadia Girard "Marcus is not one man." NeXTstation Turbo Color / TOS 4.04 From afischer@mindspring.com Tue Jan 17 16:41:26 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!mindspring!afischer From: afischer@mindspring.com (Aiko Fischer) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan17.164126.1775@mindspring.com> Date: Tue, 17 Jan 1995 16:41:26 GMT References: <1995Jan15.012026.7465@kth.se> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan15.012026.7465@kth.se>, rmoreno@kth.se (Raj Moreno) 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. -- Aiko Fischer | afischer@mindspring.com PGP Key fingerprint: 4167 2557 36F8 730C "Keep the channels open."