Unit 'System' Package
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BsrDWord

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

Declaration

Source position: systemh.inc line 1241

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

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.


Documentation generated on: Jul 24 2023