BsrQWord function
Return the position of the leftmost set bit in a 64-bit value.
Declaration
function BsrQWord(const AValue: QWord): CardinalDescription
BsfQWord scans the QWord
AValue, starting at the leftmost position and
working towards position 0, and returns the index of the first set bit.
The position is measured from the 0-th, rightmost bit.
When the input is 0, the result is 255 (unsigned equivalent of -1).
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.