Question $17$

$1pts$

Write a $C$ or $C-$like language expression that corresponds to the calculation completed by the following code presuming that A and B are "global variables" that live in memory as shown. Your answer is a $C$ language expression, and should be not more than one brief line.

$.$orig $3000$

AND RO$,$ RO$,$ #O

AND R$1,$ R$1,$ #$0$

LD RO$,$ A

LD R$1,$ B

ADD RO$,$ RO$,$ RO

ADD RO$,$ RO$,$ RO

ADD RO$,$ RO$,$ R$1$

ADD R$1,$ R$1,$ #$-1$

ADD R$1,$ R$1,$ R$1$

ADD RO$,$ RO$,$ R$1$

ST RO$,$ A

HALT

A $.$FILL SOMEVALUE

B $.$FILL SOMEOTHERVALUE

$.$END

Note: I did not give specific initial values for A and $B.$ I do not want a numeric answer based on specific contents of A and $B.$ I want a $C$ language expression that describes the TOTAL effect on A and $B$ written in terms of A and $B$ treated as if they were variables and if the above code were created to implement the expression in LC$3.$