ROL¶

Rotates a bit string left by a specified number of positions.

Signature¶

    ┌─────────┐
IN ─┤         │
    │   ROL   ├─ OUT
 N ─┤         │
    └─────────┘

FUNCTION ROL : ANY_BIT
  VAR_INPUT
    IN : ANY_BIT;
    N  : ANY_INT;
  END_VAR
END_FUNCTION

The return type matches the type of IN. ROL accepts BYTE, WORD, DWORD, LWORD for IN; N is INT.

Inputs

Name	Type	Description
`IN`	`ANY_BIT`	The bit string to rotate.
`N`	`ANY_INT`	Number of positions to rotate left.

Outputs

Name	Type	Description
Return value	`ANY_BIT`	IN rotated left by N positions, with bits wrapping from the leftmost to the rightmost position. Same type as IN.

Rotates the bit string IN left by N positions. Bits shifted out of the leftmost position wrap around to the rightmost position. No bits are lost.

Try it

Source

result := ROL(WORD#16#F000, 4);        (* result = 16#000F *)