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    BsrDWord

    Return the position of the leftmost set bit in a 32-bit value.

    Declaration

    Source position: systemh.inc line 1255

    function BsrDWord(const AValue: DWord) : Cardinal;

    Description

    BsrDWord scans the DWord 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

    Name Description
    BsrByte Return the position of the leftmost set bit in an 8-bit value.
    BsrWord Return the position of the leftmost 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.