VU VICKY Virtual University Assignment Solution, Past Papers, Handouts and other material

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Q 1. Write the SRC assembly language program to evaluate the following expression.

X = 4(7+c) – 8*d + 64(21+e)

Where c=11, d=17 and e= 23

Note: X, c, d and e are memory labels

Q 2. Write 0-address assembly instructions to evaluate the expression given in Q 1.

Solutions

Note: X, c, d and e are memory labels

                             .ORG 300                             ;Start the next line at address 300
c                            .Dw 11                                    ;reserve one word for the label c in the memory
d                                 .Dw  17                                    ;reserve c word for d , this will be at address 304
e                            .Dw 23                                    ;reverse c word for e , this will be at address  308
x                            .Dw 0                                    ;reserve one word for the final result 312


ld         R0, e         
ld         R1,21                                         
addi     R2,R1 R0,                       
shl       R3,R2,6                           
ld         R4,c
addi     R5, R4,7
shl      R6,R5, 2 
ld        R7,d      
mul     R8, R7,8
sub      R9,R6,R7.
addi     R10,R3,R7
st          R10,x        

Q 2. Write 0-address assembly instructions to evaluate the expression given in Q 1.



push e
push 21 
add
push 64
mul
push c
push 7
add
push 4
mul
push d
push 8
mul
sub
add
pop x