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Shift right (shr) performs a logical right bit-shift operation (opposite than shl).
Shr with signed types
Note: unlike the >> operator in the C language, the shr operator is a logical (not arithmetic) bit shift, even if the left operand is a signed integer. An implicit typecast and extension to a larger unsigned type may be performed before the shift operation. Check what the following program actually prints.
program ShrTest; begin WriteLn(ShortInt(-3) shr 1); end.
Is a bit set
function isBitSet(AValue, ABitNumber:integer):boolean; begin result:=odd(AValue shr ABitNumber); end;