Re: 32x32=64

"R. L. Watkins" <RLWatkins@CompuServe.Com>
22 Dec 2001 22:55:31 -0500

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32x32=64 gah@ugcs.caltech.edu (2001-12-20)
Re: 32x32=64 RLWatkins@CompuServe.Com (R. L. Watkins) (2001-12-22)
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From: "R. L. Watkins" <RLWatkins@CompuServe.Com>
Newsgroups: comp.compilers
Date: 22 Dec 2001 22:55:31 -0500
Organization: Compilers Central
References: 01-12-107
Keywords: arithmetic, history, comment
Posted-Date: 22 Dec 2001 22:55:31 EST

One example of 16x16 being Aztec C for the 486 and 68K CPUs.


R. L. Watkins


> The point was made that mutliplying two 32 bit numbers, with one or
> both cast to a 64 bit type, could be done using a 32 x 32 multiply
> with 64 bit product instruction that many machines have.-- glen
>
> [They sure did it for 16x16 -> 32 -John]

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