From tkim@hanse.de Fri Oct 21 18:52:40 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!hanse!tkim From: tkim@hanse.de (Tyler Kim) Newsgroups: comp.sys.m68k Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct21.185240.5658@hanse.de> Date: Fri, 21 Oct 1994 18:52:40 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. 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. -- Tyler Kim "Row 14. No joke." 486DX4/100 (FreeBSD 2.0.5) / NEXTSTEP 3.3 From lnilsson@tum.de Sat Oct 22 12:01:40 1994 Path: ashpoly!cascade!transat!ukc!fennimore!tum!lnilsson From: lnilsson@tum.de (Lisa Nilsson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct22.120140.5985@tum.de> Date: Sat, 22 Oct 1994 12:01:40 GMT References: <1994Oct21.185240.5658@hanse.de> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Oct21.185240.5658@hanse.de>, tkim@hanse.de (Tyler Kim) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- === Lisa Nilsson === Dept of Electrical Engineering, Technische Universität München "Extraordinary claims require extraordinary spectra." From njohansson@rwth-aachen.de Sun Oct 23 10:24:40 1994 Path: ashpoly!cascade!bigsur!rwth-aachen!njohansson From: njohansson@rwth-aachen.de (Nadine Johansson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct23.102440.3892@rwth-aachen.de> Date: Sun, 23 Oct 1994 10:24:40 GMT References: <1994Oct21.185240.5658@hanse.de> <1994Oct22.120140.5985@tum.de> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Oct22.120140.5985@tum.de>, lnilsson@tum.de (Lisa Nilsson) 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. -- Nadine Johansson "There are 14 nodes and only 10 countries. Count again." PC-9821Ap2 (NEC) / SunOS 4.1.4 From fgarcia@cern.ch Mon Oct 24 11:59:40 1994 Path: ashpoly!cascade!transat!ukc!fennimore!cern!fgarcia From: fgarcia@cern.ch (Fiona García) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct24.115940.4751@cern.ch> Date: Mon, 24 Oct 1994 11:59:40 GMT References: <1994Oct21.185240.5658@hanse.de> <1994Oct22.120140.5985@tum.de> <1994Oct23.102440.3892@rwth-aachen.de> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Oct23.102440.3892@rwth-aachen.de>, njohansson@rwth-aachen.de (Nadine Johansson) 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. -- Fiona García -- European Laboratory for Particle Physics, Geneva "We don't sign stars. We build them."