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From: rf@wu1.UUCP
Newsgroups: net.micro.68k,net.micro
Subject: Re: MC68881 Floating-point performance times (timing of single and double precision computation)
Message-ID: <327@wu1.UUCP>
Date: Wed, 12-Dec-84 13:13:43 EST
Article-I.D.: wu1.327
Posted: Wed Dec 12 13:13:43 1984
Date-Received: Sat, 15-Dec-84 01:49:56 EST
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Ed Nather ({allegra,ihnp4}!{ut-sally,noao}!utastro!nather) writes:

  Perhaps the most interesting thing about these timings is that there
  is essentially NO PENALTY IN USING DOUBLE vs SINGLE PRECISION in the
  basic floating point operations.  

Say WHAT?  The timing chart shows single precision multiply as about
1/4 faster than double precision multiply.  Single precision divide is
similarly faster than double precision divide.  There is also a penalty
for fetching double-precision constants from memory.

"Orion shall rise!"		Randolph Fritz
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