Reverse the bit order in a 32-bit word.
is an optional condition code.
is the destination register.
is the register holding the operand.
You cannot use PC for any register.
You can use SP in ARM instructions but this is deprecated in ARMv6T2 and above. You cannot use SP in Thumb instructions.
This instruction does not change the flags.
This ARM instruction is available in ARMv6T2 and above.
This 32-bit Thumb instruction is available in ARMv6T2 and above.
This 16-bit Thumb instruction is available in ARMv6 and above.
RBIT r7, r8