Introduction to ARM

Operand2

Operand2 is the flexible second operand to most instructions. It can take one of three different forms:

Immediate value.
An 8-bit number rotated right by an even number of places.
Register shifted by value.
A 5-bit unsigned integer shift.
Register shifted by register.
The bottom 8 bits of a register.

Examples

MOV r0, #42
ORR r1, r1, #0xFF00
Immediate values.
MOV r2, r2, LSR #1
RSB r10, r5, r14, ASR #14
Registers shifted by values.
BIC r11, r11, r1, LSL r0
CMP r9, r8, ROR r0
Registers shifted by registers.

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