From aoliveira@u-tokyo.ac.jp Sat Jul 01 21:19:35 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!u-tokyo!aoliveira
From: aoliveira@u-tokyo.ac.jp (Anton Oliveira)
Newsgroups: comp.sys.m68k
Subject: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Jul01.211935.7404@u-tokyo.ac.jp>
Date: Sat, 01 Jul 1995 21:19:35 GMT
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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.
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!

-- 
=== Anton Oliveira ===
Dept of Electrical Engineering, University of Tokyo Department of Information Science
"Hardware is temporary. The signal survives."

From neriksson@earthlink.net Sun Jul 02 20:24:35 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!neriksson
From: neriksson@earthlink.net (Natalia Eriksson)
Newsgroups: comp.sys.m68k
Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Jul02.202435.5584@earthlink.net>
Date: Sun, 02 Jul 1995 20:24:35 GMT
References: <1995Jul01.211935.7404@u-tokyo.ac.jp>
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In article <1995Jul01.211935.7404@u-tokyo.ac.jp>, aoliveira@u-tokyo.ac.jp (Anton Oliveira) writes:
> 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.

The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds.

-- 
=== Natalia Eriksson ===
Dept of Electrical Engineering, EarthLink Network
"Marcus is not one man."