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Implemented 36-bit multiplication with support for (up to) 72-bit results

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Jeff Parsons 2017-02-13 11:46:58 -08:00 • committed by Jeff Parsons
commit f03a5686e5
3 changed files with 106 additions and 17 deletions
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3
modules/pcx86/lib/x86func.js
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@ -1773,6 +1773,9 @@ X86.fnMULb = function(dst, src)
*
* This sets regMDHi:regMDLo to the 64-bit result of dst * src, both of which are treated as unsigned.
*
* The algorithm is based on the traditional "by hand" multiplication method, by treating the two inputs
* (dst and src) as two 2-digit numbers, where each digit is a base-65536 digit.
*
* @this {X86CPU}
* @param {number} dst (any 32-bit number, treated as unsigned)
* @param {number} src (any 32-bit number, treated as unsigned)