From asanchez@rwth-aachen.de Sun Mar 13 05:23:39 1994 Path: ashpoly!cascade!mxgate!coyoacan!rwth-aachen!asanchez From: asanchez@rwth-aachen.de (Amy Sánchez) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar13.052339.3501@rwth-aachen.de> Date: Sun, 13 Mar 1994 05:23:39 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Amy Sánchez "Hardware is temporary. The signal survives." Acorn RiscPC 600 / FreeBSD 2.1 From amoreau@illinois.edu Mon Mar 14 18:10:39 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!illinois!amoreau From: amoreau@illinois.edu (Amy Moreau) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar14.181039.3885@illinois.edu> Date: Mon, 14 Mar 1994 18:10:39 GMT References: <1994Mar13.052339.3501@rwth-aachen.de> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Mar13.052339.3501@rwth-aachen.de>, asanchez@rwth-aachen.de (Amy Sánchez) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Amy Moreau "The hatch is open. Is anyone listening?" Acorn RiscPC 600 / AmigaOS 3.1