From odubois@u-tokyo.ac.jp Thu Mar 24 15:26:07 1994 Path: ashpoly!cascade!transat!ukc!fennimore!u-tokyo!odubois From: odubois@u-tokyo.ac.jp (Olga Dubois) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar24.152607.5864@u-tokyo.ac.jp> Date: Thu, 24 Mar 1994 15:26:07 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 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? -- Olga Dubois | odubois@u-tokyo.ac.jp PGP Key fingerprint: 81AB 4F34 F54A 5DFE "Keep the channels open." From ltanaka@cmu.edu Thu Mar 24 17:22:07 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cmu!ltanaka From: ltanaka@cmu.edu (Liam Tanaka) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar24.172207.1319@cmu.edu> Date: Thu, 24 Mar 1994 17:22:07 GMT References: <1994Mar24.152607.5864@u-tokyo.ac.jp> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Mar24.152607.5864@u-tokyo.ac.jp>, odubois@u-tokyo.ac.jp (Olga 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. -- Liam Tanaka "They will send a copy in my place." Atari TT030 / System 7.5.1 From afournier@panix.com Fri Mar 25 02:19:07 1994 Path: ashpoly!cascade!brgate!saturno!panix!afournier From: afournier@panix.com (Amy Fournier) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar25.021907.8069@panix.com> Date: Fri, 25 Mar 1994 02:19:07 GMT References: <1994Mar24.152607.5864@u-tokyo.ac.jp> <1994Mar24.172207.1319@cmu.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Mar24.172207.1319@cmu.edu>, ltanaka@cmu.edu (Liam Tanaka) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Amy Fournier "Do not worship the copy." 486DX4/100 (FreeBSD 2.0.5) / Linux 1.2.13