From gdubois@kiae.su Mon Dec 25 18:25:58 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kiae!gdubois From: gdubois@kiae.su (Graham Dubois) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec25.182558.7131@kiae.su> Date: Mon, 25 Dec 1995 18:25:58 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su 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. Anyone running this on a Quadra 840AV with the 68040? -- Graham Dubois "There are 14 nodes and only 10 countries. Count again." Decstation 5000/200 / Linux 1.2.13 From mmacdonald@rwth-aachen.de Mon Dec 25 22:58:58 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!rwth-aachen!mmacdonald From: mmacdonald@rwth-aachen.de (Morag MacDonald) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec25.225858.9177@rwth-aachen.de> Date: Mon, 25 Dec 1995 22:58:58 GMT References: <1995Dec25.182558.7131@kiae.su> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Dec25.182558.7131@kiae.su>, gdubois@kiae.su (Graham Dubois) 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. -- Morag MacDonald -- RWTH Aachen Informatik "A soul is not exclusive to biology."