2. a) (10 points) What C code line most likely created this assembly code? Assum

Question

2. a) (10 points) What C code line most likely created this assembly code? Assume A, B, C and D variables in assembly are x, y, z and w in C, respectively b) (5 points) What is the result in A at the end of execution of this program? Assembly Program AREA c, CODE EXPORT main ENTRY main PROC LDR r2, =B LDR r3, [r2] LDR r2, =C LDR r5, [r2] ADD r3, r3, r5 LDR r2,-D LDR r5, [r2] SUB r3, r3, r5 LDR r2, -A STR r3, [r2 AREA d, DATA A DCD B DCD 5 C DCD D DCD 2 ENDP END (15 points) For the six-bit binary values given below, find the equivalent decimal values when the data is interpreted as unsigned integers or signed integers. 3. 001111, 101011, 110110

Explanation / Answer

a)

A = x

B = y

C = z

D = w

int main(){

int x=0;

int y=5;

int z=1;

int w=2;

x = y+z-w;

return 0;

}

b)

A = B+C-D = 4

c)

001111 :-

Unsigned = 15

Signed = 15

101011 :-

Unsigned = 43

Signed = -21

110110 :-

Unsigned = 54

Signed = -10

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