From mito@mindspring.com Mon Feb 07 09:11:08 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mindspring!mito From: mito@mindspring.com (Mei Ito) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb07.091108.7256@mindspring.com> Date: Mon, 07 Feb 1994 09:11:08 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. 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. Anyone running this on a Quadra 840AV with the 68040? -- Mei Ito "Measuring a record you own is listening, not piracy." Atari Falcon 030 / Linux 1.2.13 From koliveira@cmu.edu Tue Feb 08 09:02:08 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cmu!koliveira From: koliveira@cmu.edu (Kenji Oliveira) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb08.090208.2065@cmu.edu> Date: Tue, 08 Feb 1994 09:02:08 GMT References: <1994Feb07.091108.7256@mindspring.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Feb07.091108.7256@mindspring.com>, mito@mindspring.com (Mei Ito) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Kenji Oliveira Tape trading list upon request. SASE required for international mail. From dwatanabe@panix.com Wed Feb 09 11:43:08 1994 Path: ashpoly!cascade!mxgate!coyoacan!panix!dwatanabe From: dwatanabe@panix.com (Dong-hyun Watanabe) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb09.114308.3994@panix.com> Date: Wed, 09 Feb 1994 11:43:08 GMT References: <1994Feb07.091108.7256@mindspring.com> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Feb07.091108.7256@mindspring.com>, mito@mindspring.com (Mei Ito) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Dong-hyun Watanabe "The carrier frequency does not drift by accident." Sun 3/60 (SunOS 4.1.1) / AmigaOS 3.1 From mtanaka@berkeley.edu Thu Feb 10 19:55:08 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!berkeley!mtanaka From: mtanaka@berkeley.edu (Matthias Tanaka) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb10.195508.6954@berkeley.edu> Date: Thu, 10 Feb 1994 19:55:08 GMT References: <1994Feb07.091108.7256@mindspring.com> <1994Feb09.114308.3994@panix.com> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Feb09.114308.3994@panix.com>, dwatanabe@panix.com (Dong-hyun Watanabe) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- === Matthias Tanaka === Dept of Electrical Engineering, UC Berkeley Department of EECS "Extraordinary claims require extraordinary spectra." From vstewart@panix.com Sat Feb 12 09:23:08 1994 Path: ashpoly!cascade!mxgate!coyoacan!panix!vstewart From: vstewart@panix.com (Valeria Stewart) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb12.092308.2437@panix.com> Date: Sat, 12 Feb 1994 09:23:08 GMT References: <1994Feb07.091108.7256@mindspring.com> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Feb07.091108.7256@mindspring.com>, mito@mindspring.com (Mei Ito) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Valeria Stewart Tape trading list upon request. SASE required for international mail.