BITROL Function

X = BITROL(a, n, width)

Rotates integer a left by n bits within a given width.

---

How to read it

• Only the lowest width bits participate in the rotation.
• Width is typically 1–64.
• Result is masked back to the chosen width.

---

Examples

PRINT BITROL(&9, 1, 4)

This rotates 1001₂ left by one within 4 bits, giving 0011₂ = 3.

---

Notes

• Operates on 64-bit integers.
• Rotation width must be chosen carefully; too small discards high bits.

See also:
BITROR · BITSHL