LSL: Logical Left Shift
LSR: Logical Right Shift
ASR: Logical Right Shift
ROR: Rotate Right
RRX: Rotate Right with Extend
There is no ASL (arithmetic left shift) because ASL has the same effect as LSL.
There is no ROL (rotate left shift), because a circular left shift of n bits can be achieved by a circular right shift of 32-n bits.
There is no circular left shift with carry, because a circular left shift of n bits with carry can be achieved by a circular right shift of 33-n bits.
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Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.
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