From mnakamura@pipeline.com Thu Jul 14 21:29:29 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pipeline!mnakamura From: mnakamura@pipeline.com (Mei Nakamura) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jul14.212929.9293@pipeline.com> Date: Thu, 14 Jul 1994 21:29:29 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). 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. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Mei Nakamura "Tape doesn't lie at 02:14. Ears do." Atari TT030 / AmigaOS 3.1 From evasiliev@berkeley.edu Sat Jul 16 00:08:29 1994 Path: ashpoly!cascade!bigsur!berkeley!evasiliev From: evasiliev@berkeley.edu (Élodie Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jul16.000829.1634@berkeley.edu> Date: Sat, 16 Jul 1994 00:08:29 GMT References: <1994Jul14.212929.9293@pipeline.com> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Jul14.212929.9293@pipeline.com>, mnakamura@pipeline.com (Mei Nakamura) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Élodie Vasiliev | evasiliev@berkeley.edu PGP Key fingerprint: CD74 9D03 20D5 5D33 "Keep the channels open." From esouza@delphi.com Sun Jul 17 09:57:29 1994 Path: ashpoly!cascade!brgate!saturno!delphi!esouza From: esouza@delphi.com (Elaine Souza) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jul17.095729.2299@delphi.com> Date: Sun, 17 Jul 1994 09:57:29 GMT References: <1994Jul14.212929.9293@pipeline.com> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Jul14.212929.9293@pipeline.com>, mnakamura@pipeline.com (Mei Nakamura) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Elaine Souza Tape trading list upon request. SASE required for international mail.