From gstewart@clari.net Fri Jul 14 03:15:23 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!clari!gstewart From: gstewart@clari.net (Göran Stewart) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jul14.031523.8814@clari.net> Date: Fri, 14 Jul 1995 03:15:23 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. 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? -- Göran Stewart "Hold for relay." Atari TT030 / SunOS 4.1.4 From sivanov@hanse.de Fri Jul 14 19:46:23 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!hanse!sivanov From: sivanov@hanse.de (Sun-mi Ivanov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jul14.194623.9828@hanse.de> Date: Fri, 14 Jul 1995 19:46:23 GMT References: <1995Jul14.031523.8814@clari.net> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jul14.031523.8814@clari.net>, gstewart@clari.net (Göran Stewart) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Sun-mi Ivanov -- Hanse-Netzwerk Hamburg "In theory there is no difference between theory and practice." From msato@u-tokyo.ac.jp Sun Jul 16 07:33:23 1995 Path: ashpoly!cascade!bigsur!u-tokyo!msato From: msato@u-tokyo.ac.jp (Mei Sato) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jul16.073323.6974@u-tokyo.ac.jp> Date: Sun, 16 Jul 1995 07:33:23 GMT References: <1995Jul14.031523.8814@clari.net> <1995Jul14.194623.9828@hanse.de> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jul14.194623.9828@hanse.de>, sivanov@hanse.de (Sun-mi Ivanov) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Mei Sato | msato@u-tokyo.ac.jp PGP Key fingerprint: 7757 888E 2928 E735 "Keep the channels open."