From rdubois@panix.com Sun Mar 19 02:19:46 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!panix!rdubois From: rdubois@panix.com (Rodrigo Dubois) Newsgroups: comp.sys.m68k Subject: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar19.021946.1781@panix.com> Date: Sun, 19 Mar 1995 02:19:46 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 10 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. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Rodrigo Dubois -- Public Access Unix of New York "We don't sign stars. We build them." From jmoreau@utexas.edu Mon Mar 20 16:44:46 1995 Path: ashpoly!cascade!bigsur!utexas!jmoreau From: jmoreau@utexas.edu (Jen Moreau) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar20.164446.3052@utexas.edu> Date: Mon, 20 Mar 1995 16:44:46 GMT References: <1995Mar19.021946.1781@panix.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Mar19.021946.1781@panix.com>, rdubois@panix.com (Rodrigo Dubois) writes: > 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. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Jen Moreau Zyxel U-1496E @ 9600 Telebit bps "Tape doesn't lie at 02:14. Ears do."