From nsouza@cam.ac.uk Sat Aug 20 07:49:05 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!cam!nsouza From: nsouza@cam.ac.uk (Nadine Souza) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug20.074905.5484@cam.ac.uk> Date: Sat, 20 Aug 1994 07:49:05 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] 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. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Nadine Souza *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From kreyes@stanford.edu Sat Aug 20 11:19:05 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!stanford!kreyes From: kreyes@stanford.edu (Karen Reyes) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug20.111905.1078@stanford.edu> Date: Sat, 20 Aug 1994 11:19:05 GMT References: <1994Aug20.074905.5484@cam.ac.uk> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Aug20.074905.5484@cam.ac.uk>, nsouza@cam.ac.uk (Nadine Souza) 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. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- === Karen Reyes === Dept of Electrical Engineering, Stanford University Computer Systems Lab "Row 14. No joke."