Embedded System Notes

ASL (Arithmetic Shift Left)

Signed multiplication, zero bit is set to 0

ASR (Arithmetic Shift Right)

Division by 2, bit 7 is not changed

LSL (Logical Shift Left)

Move bits to the left and replace the spaces by 0. The bit which falls off disappears.

LSR (Logical Shift Right)

Move bits to the right and replace the spaces by 0. The bit which falls off disappears.