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James Gregory 2013-12-31 11:06:31 +11:00
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06-02.md
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@ -173,9 +173,11 @@ Multiplying a 32-bit value by a non-power-of-two multiplier in just 2
cycles is a pretty neat trick, even though it works only on a 386 or
486.
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![](images/i.jpg) *The full list of values that **LEA** can multiply a register by on a 386 or 486 is: 2, 3, 4, 5, 8, and 9. That list doesn't include every multiplier you might want, but it covers some commonly used ones, and the performance is hard to beat.*
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> ![](images/i.jpg)
> The full list of values that **LEA** can multiply a register by on a 386
> or 486 is: 2, 3, 4, 5, 8, and 9. That list doesn't include every
> multiplier you might want, but it covers some commonly used ones, and
> the performance is hard to beat.
I'd like to extend my thanks to Duane Strong of Metagraphics for his
help in brainstorming uses for the 386 version of **LEA** and for