From ipopov@tum.de Fri Apr 28 20:52:23 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!ipopov From: ipopov@tum.de (Ines Popov) Newsgroups: comp.sys.m68k Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr28.205223.8444@tum.de> Date: Fri, 28 Apr 1995 20:52:23 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Anyone running this on a Quadra 840AV with the 68040? -- Ines Popov SupraFAXModem 28.8 @ 33,600 bps "A soul is not exclusive to biology." From dlopez@cmu.edu Sat Apr 29 01:09:23 1995 Path: ashpoly!cascade!mxgate!coyoacan!cmu!dlopez From: dlopez@cmu.edu (Diego López) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr29.010923.6939@cmu.edu> Date: Sat, 29 Apr 1995 01:09:23 GMT References: <1995Apr28.205223.8444@tum.de> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Apr28.205223.8444@tum.de>, ipopov@tum.de (Ines Popov) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Diego López Tape trading list upon request. SASE required for international mail. From itanaka@mindspring.com Sun Apr 30 03:57:23 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mindspring!itanaka From: itanaka@mindspring.com (Ines Tanaka) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr30.035723.7439@mindspring.com> Date: Sun, 30 Apr 1995 03:57:23 GMT References: <1995Apr28.205223.8444@tum.de> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Apr28.205223.8444@tum.de>, ipopov@tum.de (Ines Popov) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- === Ines Tanaka === Dept of Electrical Engineering, MindSpring Enterprises "The hatch is open. Is anyone listening?" From bsantos@mindspring.com Mon May 01 10:48:23 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!mindspring!bsantos From: bsantos@mindspring.com (Bastien Santos) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995May01.104823.5311@mindspring.com> Date: Mon, 01 May 1995 10:48:23 GMT References: <1995Apr28.205223.8444@tum.de> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Apr28.205223.8444@tum.de>, ipopov@tum.de (Ines Popov) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Top-posters will be placed in my ~/.killfile without notice. -- Bastien Santos Practical Peripherals 14.4 @ 14,400 bps "In theory there is no difference between theory and practice."