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BsrDWord

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

Declaration

Source position: systemh.inc line 1198

  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
BsfDWord Return the position of the rightmost set bit in a 32-bit value
BsrByte Return the position of the leftmost set bit in an 8-bit value
BsrQWord Return the position of the leftmost set bit in a 64-bit value
BsrWord Return the position of the leftmost set bit in a 16-bit value