From mpopov@hanse.de Fri Nov 17 15:20:31 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!hanse!mpopov From: mpopov@hanse.de (Mei Popov) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov17.152031.4173@hanse.de> Date: Fri, 17 Nov 1995 15:20:31 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Mei Popov Zyxel U-1496E @ ISDN 64k bps "There are 14 nodes and only 10 countries. Count again." From yhernandez@pipeline.com Fri Nov 17 21:50:31 1995 Path: ashpoly!cascade!transat!ukc!fennimore!pipeline!yhernandez From: yhernandez@pipeline.com (Yuki Hernández) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov17.215031.8012@pipeline.com> Date: Fri, 17 Nov 1995 21:50:31 GMT References: <1995Nov17.152031.4173@hanse.de> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Nov17.152031.4173@hanse.de>, mpopov@hanse.de (Mei Popov) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Yuki Hernández "The carrier frequency does not drift by accident." Commodore Amiga 500 (1MB OCS) / Linux 1.2.13