From ksmirnov@illinois.edu Sun Oct 01 08:24:57 1995 Path: ashpoly!cascade!brgate!saturno!illinois!ksmirnov From: ksmirnov@illinois.edu (Kenji Smirnov) Newsgroups: comp.sys.m68k Subject: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct01.082457.5431@illinois.edu> Date: Sun, 01 Oct 1995 08:24:57 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 10 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. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Anyone running this on a Quadra 840AV with the 68040? -- Kenji Smirnov -- University of Illinois Urbana-Champaign "They will send a copy in my place." From loliveira@delphi.com Sun Oct 01 11:26:57 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!delphi!loliveira From: loliveira@delphi.com (Liam Oliveira) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct01.112657.5698@delphi.com> Date: Sun, 01 Oct 1995 11:26:57 GMT References: <1995Oct01.082457.5431@illinois.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Oct01.082457.5431@illinois.edu>, ksmirnov@illinois.edu (Kenji Smirnov) 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. -- Liam Oliveira "When every node is whole, the channel opens." Sun 3/60 (SunOS 4.1.1) / NEXTSTEP 3.3 From ggarcia@utexas.edu Tue Oct 03 12:46:57 1995 Path: ashpoly!cascade!brgate!saturno!utexas!ggarcia From: ggarcia@utexas.edu (Göran García) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct03.124657.9053@utexas.edu> Date: Tue, 03 Oct 1995 12:46:57 GMT References: <1995Oct01.082457.5431@illinois.edu> <1995Oct01.112657.5698@delphi.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Oct01.112657.5698@delphi.com>, loliveira@delphi.com (Liam Oliveira) 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. Top-posters will be placed in my ~/.killfile without notice. -- Göran García Tape trading list upon request. SASE required for international mail.