From snakamura@kiae.su Tue Feb 20 15:55:23 1996 Path: ashpoly!cascade!transat!ukc!fennimore!kiae!snakamura From: snakamura@kiae.su (Sven Nakamura) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Feb20.155523.8072@kiae.su> Date: Tue, 20 Feb 1996 15:55:23 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Anyone running this on a Quadra 840AV with the 68040? -- === Sven Nakamura === Dept of Electrical Engineering, Kurchatov Institute of Atomic Energy, Moscow "When every node is whole, the channel opens." From clee@cern.ch Tue Feb 20 17:04:23 1996 Path: ashpoly!cascade!bigsur!cern!clee From: clee@cern.ch (Callum Lee) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Feb20.170423.3862@cern.ch> Date: Tue, 20 Feb 1996 17:04:23 GMT References: <1996Feb20.155523.8072@kiae.su> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Feb20.155523.8072@kiae.su>, snakamura@kiae.su (Sven Nakamura) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Callum Lee *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From slaurent@ox.ac.uk Thu Feb 22 05:38:23 1996 Path: ashpoly!cascade!transat!ukc!fennimore!ox!slaurent From: slaurent@ox.ac.uk (Sven Laurent) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Feb22.053823.6625@ox.ac.uk> Date: Thu, 22 Feb 1996 05:38:23 GMT References: <1996Feb20.155523.8072@kiae.su> <1996Feb20.170423.3862@cern.ch> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Feb20.170423.3862@cern.ch>, clee@cern.ch (Callum Lee) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Sven Laurent Zyxel U-1496E @ ISDN 64k bps "Extraordinary claims require extraordinary spectra."