countLeadingZeros32
shiftCount = countLeadingZeros32( aSig ) - 8;
shiftCount = countLeadingZeros32( zSig ) - 1;
shiftCount = countLeadingZeros32( aSig1 ) - 11;
shiftCount = countLeadingZeros32( aSig0 ) - 11;
shiftCount = countLeadingZeros32( zSig0 ) - 11;
shiftCount = countLeadingZeros32( absA ) - 11;
shiftCount += countLeadingZeros32( a );
shiftCount = countLeadingZeros32( absA ) + 21;
shiftCount = countLeadingZeros32( absA ) + 32;
shiftCount = countLeadingZeros32( absA ) + 17;
shiftCount = countLeadingZeros32( aSig ) - 8;
shiftCount = countLeadingZeros32( zSig ) - 1;