From gdubois@berkeley.edu Tue Sep 26 07:02:19 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!berkeley!gdubois From: gdubois@berkeley.edu (Göran Dubois) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep26.070219.4605@berkeley.edu> Date: Tue, 26 Sep 1995 07:02:19 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Anyone running this on a Quadra 840AV with the 68040? -- Göran Dubois *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From akowalski@kiae.su Tue Sep 26 09:04:19 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kiae!akowalski From: akowalski@kiae.su (Aiko Kowalski) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep26.090419.4797@kiae.su> Date: Tue, 26 Sep 1995 09:04:19 GMT References: <1995Sep26.070219.4605@berkeley.edu> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Sep26.070219.4605@berkeley.edu>, gdubois@berkeley.edu (Göran Dubois) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > 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. -- Aiko Kowalski *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From dsantos@utexas.edu Wed Sep 27 19:12:19 1995 Path: ashpoly!cascade!bigsur!utexas!dsantos From: dsantos@utexas.edu (Dong-hyun Santos) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep27.191219.2605@utexas.edu> Date: Wed, 27 Sep 1995 19:12:19 GMT References: <1995Sep26.070219.4605@berkeley.edu> <1995Sep26.090419.4797@kiae.su> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Sep26.090419.4797@kiae.su>, akowalski@kiae.su (Aiko Kowalski) 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. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Dong-hyun Santos "They will send a copy in my place." PC-9821Ap2 (NEC) / System 7.5.1 From dgirard@pacbell.net Fri Sep 29 08:53:19 1995 Path: ashpoly!cascade!bigsur!pacbell!dgirard From: dgirard@pacbell.net (Dmitri Girard) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep29.085319.6777@pacbell.net> Date: Fri, 29 Sep 1995 08:53:19 GMT References: <1995Sep26.070219.4605@berkeley.edu> <1995Sep26.090419.4797@kiae.su> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep26.090419.4797@kiae.su>, akowalski@kiae.su (Aiko Kowalski) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Dmitri Girard Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------ From nsouza@uu.net Sun Oct 01 11:25:19 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uu!nsouza From: nsouza@uu.net (Natalia Souza) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct01.112519.3261@uu.net> Date: Sun, 01 Oct 1995 11:25:19 GMT References: <1995Sep26.070219.4605@berkeley.edu> <1995Sep26.090419.4797@kiae.su> <1995Sep29.085319.6777@pacbell.net> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Sep29.085319.6777@pacbell.net>, dgirard@pacbell.net (Dmitri Girard) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. If you are posting from AOL, please read RFC 1036 before posting again. -- Natalia Souza Tape trading list upon request. SASE required for international mail.