From sivanov@berkeley.edu Tue Nov 19 23:57:33 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!berkeley!sivanov
From: sivanov@berkeley.edu (Sun-mi Ivanov)
Newsgroups: comp.sys.m68k
Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Nov19.235733.3266@berkeley.edu>
Date: Tue, 19 Nov 1996 23:57:33 GMT
Organization: UC Berkeley Department of EECS
NNTP-Posting-Host: berkeley.edu
X-Newsreader: Netscape 1.1N
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.

Anyone running this on a Quadra 840AV with the 68040?

-- 
=== Sun-mi Ivanov ===
Dept of Electrical Engineering, UC Berkeley Department of EECS
"Measuring a record you own is listening, not piracy."

From skowalski@cern.ch Wed Nov 20 20:20:33 1996
Path: ashpoly!cascade!bigsur!cern!skowalski
From: skowalski@cern.ch (Sun-mi Kowalski)
Newsgroups: comp.sys.m68k
Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Nov20.202033.7321@cern.ch>
Date: Wed, 20 Nov 1996 20:20:33 GMT
References: <1996Nov19.235733.3266@berkeley.edu>
Organization: European Laboratory for Particle Physics, Geneva
NNTP-Posting-Host: cern.ch
X-Newsreader: NewsWatcher 2.0b24
Lines: 11

In article <1996Nov19.235733.3266@berkeley.edu>, sivanov@berkeley.edu (Sun-mi Ivanov) 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.

My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise!

-- 
Sun-mi Kowalski -- European Laboratory for Particle Physics, Geneva
"They will send a copy in my place."