A mask generator circuit includes at least first and second mask generator circuits coupled to receive most significant and least significant sections of the pointer and to generate masks therefrom, and a plurality of {TAIL ~ circuits} {HEAD ~ each} configured to generate a region of the output mask from the mask generator circuit 
A mask generator circuit includes at least first and second mask generator circuits coupled to receive most significant and least significant sections of the pointer and to generate masks therefrom , and a plurality of { TAIL ~ circuits } { HEAD ~ each } configured to generate a region of the output mask from the mask generator circuit
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