From ynakamura@illinois.edu Sat Jul 13 06:11:12 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!illinois!ynakamura From: ynakamura@illinois.edu (Yuki Nakamura) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul13.061112.9151@illinois.edu> Date: Sat, 13 Jul 1996 06:11:12 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- === Yuki Nakamura === Dept of Electrical Engineering, University of Illinois Urbana-Champaign "In theory there is no difference between theory and practice." From hlee@titech.ac.jp Sun Jul 14 00:10:12 1996 Path: ashpoly!cascade!bigsur!titech!hlee From: hlee@titech.ac.jp (Hugo Lee) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul14.001012.9387@titech.ac.jp> Date: Sun, 14 Jul 1996 00:10:12 GMT References: <1996Jul13.061112.9151@illinois.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Jul13.061112.9151@illinois.edu>, ynakamura@illinois.edu (Yuki Nakamura) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Hugo Lee "Hardware is temporary. The signal survives." PC-9821Ap2 (NEC) / Linux 1.2.13