RPi_Assembly/ch-02/MVNandADD.s

@
@ Example of the ADD/ADC insttructions.
@
.global _start          @ Provide program starting address

@ multiply 2 by -1 by using MVN and then adding 1

_start:
    MVN     R0, #2
    ADD     R0, #1

@ Set up the parameters to exit the program
@ and then call Linux to do it.
@ R0 is the return code and will be what
@ we calculated above.
    MOV     R7, #1      @ Service command code 1
    SVC     0           @ Call Linux to terminate