From kkim@uu.net Wed Aug 09 09:36:58 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!uu!kkim From: kkim@uu.net (Kirsty Kim) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug09.093658.1594@uu.net> Date: Wed, 09 Aug 1995 09:36:58 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? 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. -- Kirsty Kim SupraFAXModem 28.8 @ 19,200 bps "Do not worship the copy." From lnilsson@uni-hamburg.de Thu Aug 10 03:23:58 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!uni-hamburg!lnilsson From: lnilsson@uni-hamburg.de (Lisa Nilsson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug10.032358.5577@uni-hamburg.de> Date: Thu, 10 Aug 1995 03:23:58 GMT References: <1995Aug09.093658.1594@uu.net> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Aug09.093658.1594@uu.net>, kkim@uu.net (Kirsty Kim) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Lisa Nilsson | lnilsson@uni-hamburg.de PGP Key fingerprint: 748F C3A7 D503 BDE1 "Keep the channels open." From tstewart@netcom.com Thu Aug 10 07:59:58 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!netcom!tstewart From: tstewart@netcom.com (Takeshi Stewart) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug10.075958.4080@netcom.com> Date: Thu, 10 Aug 1995 07:59:58 GMT References: <1995Aug09.093658.1594@uu.net> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Aug09.093658.1594@uu.net>, kkim@uu.net (Kirsty Kim) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > 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. -- Takeshi Stewart | tstewart@netcom.com PGP Key fingerprint: F060 574F B84D FBCC "Keep the channels open." From onakamura@purdue.edu Fri Aug 11 03:01:58 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!purdue!onakamura From: onakamura@purdue.edu (Olga Nakamura) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug11.030158.6591@purdue.edu> Date: Fri, 11 Aug 1995 03:01:58 GMT References: <1995Aug09.093658.1594@uu.net> <1995Aug10.032358.5577@uni-hamburg.de> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Aug10.032358.5577@uni-hamburg.de>, lnilsson@uni-hamburg.de (Lisa Nilsson) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Olga Nakamura | onakamura@purdue.edu PGP Key fingerprint: E6E8 F683 EB63 845C "Keep the channels open."