From: aho450s AT nic DOT smsu DOT edu (Tony O'Bryan)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: floating point is... fast???
Date: Sun, 19 Jan 1997 13:37:21 GMT
Organization: Southwest Missouri State University
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To: djgpp AT delorie DOT com
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On 18 Jan 1997 20:50:22 GMT, gpt20 AT thor DOT cam DOT ac DOT uk (G.P. Tootell) wrote:

>while using the profiler on some code i had written i noticed that changing a
>floating point multiply to an unsigned multiply of 2 longs turned out to be
>slower. in fact floating point multiply appears to be faster than ordinary
>integer multiply for any case. is this actually true? and if so is there any
>reason i shouldn't just change every multiply in my code to make sure it's
>floating point?

My timing manual only goes up to the 486.  The FMUL takes from 11 to 16 clocks,
where the 486 takes 13 to 42 clocks.