Changes

A 32-bit friendly implementation to find the the bit-index of [[General Setwise Operations#TheLeastSignificantOneBitLS1B|LS1B]] by [[Matt Taylor]] <ref>[httphttps://groups.google.com/groupd/msg/comp.lang.asm.x86/browse_frm3pVGzQGb1ys/fPpKBKNi848J Bit magic] by [[Matt Taylor]], [https://threadgroups.google.com/de9546cd019bd72bforum/f46209f47d2a7ddb?lnk=gst&q=Matt+Taylor+magic#f46209f47d2a7ddb !forum/comp.lang.asm.x86 comp.lang.asm.x86], June 26, 2003</ref> <ref>[https://groups.google.com/d/msg/comp.lang.asm.x86/3pVGzQGb1ys/230qffQJYvQJ Re: Bit magic] by [[Matt Taylor]], [httphttps://groups.google.com/groupforum/#!forum/comp.lang.asm.x86/topics comp.lang.asm.x86], June 2629, 2003</ref>. The [[General Setwise Operations#ExclusiveOr|xor]] with the ones' decrement, [[General Setwise Operations#LS1BSeparation|bb ^ (bb-1)]] contains all bits set including and below the [[General Setwise Operations#TheLeastSignificantOneBitLS1B|LS1B]]. The 32-bit xor-difference of both halves yields either the complement of the upper half, or the lower half otherwise. Some samples:

* [httphttps://groups.google.com/groupd/msg/comp.lang.asm.x86/browse_frm3pVGzQGb1ys/fPpKBKNi848J Bit magic] by [[Matt Taylor]], [https://threadgroups.google.com/de9546cd019bd72bforum/f46209f47d2a7ddb?lnk=gst&q=Matt+Taylor+magic#f46209f47d2a7ddb !forum/comp.lang.asm.x86 comp.lang.asm.x86], June 26, 2003: [https://groups.google.com/d/msg/comp.lang.asm.x86/3pVGzQGb1ys/230qffQJYvQJ Re: Bit magic] by [[Matt Taylor]], [httphttps://groups.google.com/groupforum/#!forum/comp.lang.asm.x86/topics comp.lang.asm.x86], June 2629, 2003