3. Assume r0 = 0xddddcccc, what is the value in r0 after running the following program. MOV r1,#0x0000FF00 ;set up mask in r1 in the bbbb position BIC r0,r0,r1 ;get ddddcccc0000aaaa MOV r1,0x00FF0000 ;set up mask in r1 in the cccc position EOR r0,r0,r1 ;toggle cccc bits Write suitable ARM code to implement if x = y call PQR else call ZXY What does the following program do? When does it stop? What are the values in memory starting from the location pointed by String2? Use Keil uVision5 to confirm the result, show the simulation screen shots. AREA scan, CODE, READWRITE Entry ADR r0,String1 ;r0 points to the source string ADR r1,String2 ;r1 points to the dest string Copy LDRB r2,[r0],#1 ;read a byte and update pointer STRB r2,[r1],#1 ;copy the byte and update ptr CMP r2,#0x00 ;test for terminator BNE Copy ;repeat until terminator found SVC #0x123456 ;stop String1 DCB "this is a string", 0x00 ;dummy string String2 SPACE 20 ;reserve 20 bytes for copy END Consider the following Java constructs. Express each in ARM assembly language. Assume all variables are single-bit Booleans and are in registers r0 = A, r1 = B, r2 = C, r3 = D. Note. The Java operators &, , ! are AND, OR, and NOT, respectively. The operators && and || are AND and OR operators that support short-circuit evaluation; that is, if the expression yields false (AND) or tr ue (OR) further evaluation is halted. A = (B & C) | (!D); A = (B && C) || (!D);