From skang@panix.com Mon Jan 23 15:47:52 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!panix!skang From: skang@panix.com (Sven Kang) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan23.154752.1275@panix.com> Date: Mon, 23 Jan 1995 15:47:52 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 10 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 Kang -- Public Access Unix of New York "Row 14. No joke." From achoi@rwth-aachen.de Wed Jan 25 18:27:52 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!achoi From: achoi@rwth-aachen.de (Aiko Choi) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan25.182752.7680@rwth-aachen.de> Date: Wed, 25 Jan 1995 18:27:52 GMT References: <1995Jan23.154752.1275@panix.com> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Jan23.154752.1275@panix.com>, skang@panix.com (Sven Kang) 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. -- Aiko Choi Tape trading list upon request. SASE required for international mail. From tpopov@kiae.su Thu Jan 26 04:06:52 1995 Path: ashpoly!cascade!bigsur!kiae!tpopov From: tpopov@kiae.su (Tyler Popov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan26.040652.9546@kiae.su> Date: Thu, 26 Jan 1995 04:06:52 GMT References: <1995Jan23.154752.1275@panix.com> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan23.154752.1275@panix.com>, skang@panix.com (Sven Kang) 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. -- Tyler Popov SupraFAXModem 28.8 @ 14,400 bps "Row 14. No joke."