From sschneider@netcom.com Wed Sep 25 07:13:12 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!netcom!sschneider From: sschneider@netcom.com (Sven Schneider) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Sep25.071312.8823@netcom.com> Date: Wed, 25 Sep 1996 07:13:12 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Sven Schneider SupraFAXModem 28.8 @ 33,600 bps "Measuring a record you own is listening, not piracy." From mrodriguez@inria.fr Fri Sep 27 10:48:12 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!inria!mrodriguez From: mrodriguez@inria.fr (Mei Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Sep27.104812.3684@inria.fr> Date: Fri, 27 Sep 1996 10:48:12 GMT References: <1996Sep25.071312.8823@netcom.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Sep25.071312.8823@netcom.com>, sschneider@netcom.com (Sven Schneider) 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. -- Mei Rodríguez Tape trading list upon request. SASE required for international mail. From spetrov@tum.de Sun Sep 29 14:27:12 1996 Path: ashpoly!cascade!transat!ukc!fennimore!tum!spetrov From: spetrov@tum.de (Sergei Petrov) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Sep29.142712.2830@tum.de> Date: Sun, 29 Sep 1996 14:27:12 GMT References: <1996Sep25.071312.8823@netcom.com> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Sep25.071312.8823@netcom.com>, sschneider@netcom.com (Sven Schneider) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > 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. -- === Sergei Petrov === Dept of Electrical Engineering, Technische Universität München "A soul is not exclusive to biology."