From msokolov@netcom.com Mon Dec 19 02:01:34 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!netcom!msokolov From: msokolov@netcom.com (Min-jun Sokolov) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Dec19.020134.4618@netcom.com> Date: Mon, 19 Dec 1994 02:01:34 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. 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. -- Min-jun Sokolov Tape trading list upon request. SASE required for international mail. From hjohansson@stanford.edu Wed Dec 21 04:33:34 1994 Path: ashpoly!cascade!bigsur!stanford!hjohansson From: hjohansson@stanford.edu (Heather Johansson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Dec21.043334.8914@stanford.edu> Date: Wed, 21 Dec 1994 04:33:34 GMT References: <1994Dec19.020134.4618@netcom.com> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Dec19.020134.4618@netcom.com>, msokolov@netcom.com (Min-jun Sokolov) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Heather Johansson "The carrier frequency does not drift by accident." Commodore Amiga 500 (1MB OCS) / TOS 4.04