From ereyes@stanford.edu Thu Apr 13 05:26:17 1995 Path: ashpoly!cascade!mxgate!coyoacan!stanford!ereyes From: ereyes@stanford.edu (Élodie Reyes) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr13.052617.8553@stanford.edu> Date: Thu, 13 Apr 1995 05:26:17 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 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? -- Élodie Reyes "We don't sign stars. We build them." Atari Falcon 030 / AmigaOS 3.1 From livanov@earthlink.net Fri Apr 14 08:53:17 1995 Path: ashpoly!cascade!brgate!saturno!earthlink!livanov From: livanov@earthlink.net (Lucia Ivanov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr14.085317.6989@earthlink.net> Date: Fri, 14 Apr 1995 08:53:17 GMT References: <1995Apr13.052617.8553@stanford.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Apr13.052617.8553@stanford.edu>, ereyes@stanford.edu (Élodie Reyes) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Lucia Ivanov *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From dito@tum.de Fri Apr 14 18:03:17 1995 Path: ashpoly!cascade!brgate!saturno!tum!dito From: dito@tum.de (Dave Ito) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr14.180317.2672@tum.de> Date: Fri, 14 Apr 1995 18:03:17 GMT References: <1995Apr13.052617.8553@stanford.edu> <1995Apr14.085317.6989@earthlink.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr14.085317.6989@earthlink.net>, livanov@earthlink.net (Lucia Ivanov) 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. -- Dave Ito | dito@tum.de PGP Key fingerprint: 6EB4 B5BE 1429 5C54 "Keep the channels open." From eschneider@mindspring.com Sat Apr 15 00:22:17 1995 Path: ashpoly!cascade!bigsur!mindspring!eschneider From: eschneider@mindspring.com (Elaine Schneider) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr15.002217.5214@mindspring.com> Date: Sat, 15 Apr 1995 00:22:17 GMT References: <1995Apr13.052617.8553@stanford.edu> <1995Apr14.085317.6989@earthlink.net> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Apr14.085317.6989@earthlink.net>, livanov@earthlink.net (Lucia Ivanov) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Top-posters will be placed in my ~/.killfile without notice. -- Elaine Schneider | eschneider@mindspring.com PGP Key fingerprint: 6A25 987A 1481 1B58 "Keep the channels open." From msilva@netcom.com Sat Apr 15 20:39:17 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!msilva From: msilva@netcom.com (Mike Silva) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr15.203917.6754@netcom.com> Date: Sat, 15 Apr 1995 20:39:17 GMT References: <1995Apr13.052617.8553@stanford.edu> <1995Apr14.085317.6989@earthlink.net> <1995Apr15.002217.5214@mindspring.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Apr15.002217.5214@mindspring.com>, eschneider@mindspring.com (Elaine Schneider) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Top-posters will be placed in my ~/.killfile without notice. -- === Mike Silva === Dept of Electrical Engineering, NETCOM On-Line Communication Services "In theory there is no difference between theory and practice."