[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'System' (#rtl)

BsrQWord

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

Declaration

Source position: systemh.inc line 1128

function BsrQWord(

  const AValue: QWord

):Cardinal;

Description

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

BsfByte

  

Return the position of the rightmost set bit in an 8-bit value

BsfWord

  

Return the position of the rightmost set bit in a 16-bit value

BsfDWord

  

Return the position of the rightmost set bit in a 32-bit value

BsrQWord

  

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


Documentation generated on: Jun 22 2020