From lsanchez@pacbell.net Fri Nov 10 11:51:31 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pacbell!lsanchez From: lsanchez@pacbell.net (Lars Sánchez) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov10.115131.6230@pacbell.net> Date: Fri, 10 Nov 1995 11:51:31 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. 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. -- === Lars Sánchez === Dept of Electrical Engineering, Pacific Bell Internet Services "The carrier frequency does not drift by accident." From rkang@hanse.de Fri Nov 10 16:09:31 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!rkang From: rkang@hanse.de (Raj Kang) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov10.160931.8355@hanse.de> Date: Fri, 10 Nov 1995 16:09:31 GMT References: <1995Nov10.115131.6230@pacbell.net> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Nov10.115131.6230@pacbell.net>, lsanchez@pacbell.net (Lars Sánchez) 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. -- Raj Kang "The carrier frequency does not drift by accident." Sun 3/60 (SunOS 4.1.1) / AmigaOS 3.1 From ghughes@stanford.edu Sun Nov 12 05:01:31 1995 Path: ashpoly!cascade!bigsur!stanford!ghughes From: ghughes@stanford.edu (Graham Hughes) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov12.050131.4360@stanford.edu> Date: Sun, 12 Nov 1995 05:01:31 GMT References: <1995Nov10.115131.6230@pacbell.net> <1995Nov10.160931.8355@hanse.de> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Nov10.160931.8355@hanse.de>, rkang@hanse.de (Raj Kang) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Graham Hughes Tape trading list upon request. SASE required for international mail. From epopov@utexas.edu Sun Nov 12 11:59:31 1995 Path: ashpoly!cascade!brgate!saturno!utexas!epopov From: epopov@utexas.edu (Elaine Popov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov12.115931.2320@utexas.edu> Date: Sun, 12 Nov 1995 11:59:31 GMT References: <1995Nov10.115131.6230@pacbell.net> <1995Nov10.160931.8355@hanse.de> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Nov10.160931.8355@hanse.de>, rkang@hanse.de (Raj Kang) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Elaine Popov "Tape doesn't lie at 02:14. Ears do." Pentium 90 (OS/2 Warp) / System 7.5.1