From kito@panix.com Fri Jul 19 14:15:46 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!kito From: kito@panix.com (Karen Ito) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul19.141546.7702@panix.com> Date: Fri, 19 Jul 1996 14:15:46 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N 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. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Karen Ito *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From msouza@earthlink.net Sun Jul 21 05:54:46 1996 Path: ashpoly!cascade!brgate!saturno!earthlink!msouza From: msouza@earthlink.net (Morag Souza) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul21.055446.4190@earthlink.net> Date: Sun, 21 Jul 1996 05:54:46 GMT References: <1996Jul19.141546.7702@panix.com> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Jul19.141546.7702@panix.com>, kito@panix.com (Karen Ito) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Morag Souza Tape trading list upon request. SASE required for international mail. From ipopov@utexas.edu Mon Jul 22 23:20:46 1996 Path: ashpoly!cascade!bigsur!utexas!ipopov From: ipopov@utexas.edu (Ines Popov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul22.232046.5484@utexas.edu> Date: Mon, 22 Jul 1996 23:20:46 GMT References: <1996Jul19.141546.7702@panix.com> <1996Jul21.055446.4190@earthlink.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Jul21.055446.4190@earthlink.net>, msouza@earthlink.net (Morag Souza) 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. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Ines Popov Zyxel U-1496E @ 19,200 bps "Extraordinary claims require extraordinary spectra."