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==Count Extensions==
The Count Extensions (CIX) was an integer extension of three instructions for [[Population Count|population count]] and [[BitScan|bitscan]] purposes, first implemented on the [https://en.wikipedia.org/wiki/Alpha_21264#Alpha_21264A Alpha 21264A (EV67)] in late 1999<ref>[https://www.stmintz.com/ccc/index.php?id=20057 Question to Bob: Crafty , Alpha and FindBit()] by [[Guido Schimmels]], [[CCC]], June 05, 1998</ref>.
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* [https://groups.google.com/d/msg/comp.arch/QB59ace2V8M/pEuccRNGoe8J Alpha Architecture Technical Summary] by [https://en.wikipedia.org/wiki/Jim_Gettys Jim Gettys], [https://groups.google.com/forum/#!forum/comp.arch comp.arch], February 25, 1992
* [https://groups.google.com/d/msg/rec.games.chess.computer/d3sYjfVJI7E/0At3bwtgYxgJ Crafty on 767Mhz Alpha at Paris WMCCC?] by Richard A. Fowell, [[Computer Chess Forums|rgcc]], September 27, 1997
* [https://www.stmintz.com/ccc/index.php?id=20057 Question to Bob: Crafty , Alpha and FindBit()] by [[Guido Schimmels]], [[CCC]], June 05, 1998 » [[Crafty]], [[BitScan]]
=External Links=
