From eandersson@kiae.su Thu Oct 13 19:29:58 1994 Path: ashpoly!cascade!bigsur!kiae!eandersson From: eandersson@kiae.su (Emi Andersson) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct13.192958.3585@kiae.su> Date: Thu, 13 Oct 1994 19:29:58 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. 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! -- Emi Andersson "They will send a copy in my place." Decstation 5000/200 / AmigaOS 3.1 From gsmirnov@cern.ch Sat Oct 15 19:22:58 1994 Path: ashpoly!cascade!bigsur!cern!gsmirnov From: gsmirnov@cern.ch (Göran Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct15.192258.6740@cern.ch> Date: Sat, 15 Oct 1994 19:22:58 GMT References: <1994Oct13.192958.3585@kiae.su> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Oct13.192958.3585@kiae.su>, eandersson@kiae.su (Emi Andersson) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Göran Smirnov Tape trading list upon request. SASE required for international mail.