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BsfQWord

Return the position of the rightmost set bit in a 64-bit value

Declaration

Source position: systemh.inc line 1204

  function BsfQWord(const AValue: QWord) : Cardinal;

Description

BsfQWord scans the QWord AValue, starting at position 0 (rightmost position) , 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

Name Description
BsfByte Return the position of the rightmost set bit in an 8-bit value
BsfDWord Return the position of the rightmost set bit in a 32-bit value
BsfWord Return the position of the rightmost set bit in a 16-bit value
BsrQWord Return the position of the leftmost set bit in a 64-bit value