In MIPS assembly, write an assembly language version of the following C code segment:
int A[100], B[100];
for (i=1; i < 100; i++) {
A[i] = A[i-1] + B[i];
}
C
code
int A[100], B[100];
for (i=1; i < 100; i++) {
A[i] = A[i-1] + B[i];
}
Let the Base address of array A[] is stored in Register
$s1
the Base address of array B[] is stored in Register $s2
MIPS code
addi $t0, $0,100 //$t0 = 100
addi $t1, $0, 1 //i =
1
Loop:
slt $t2, $t1, $t0 //if(i<100) set $t2
= 1
beq $t2, $0, Exit //if($t2 = 0) branch to
Exit
sll $t2, $t1, 2 //$t2 =
4*i
add $t3, $t2, $s1 //$t3 = address of
A[i]
add $t4, $t2, $s2 //$t4 = address of
B[i]
lw $t2, -4($t3) //$t2 =
A[i-1]
lw $t4, 0($t4) //$t4 =
B[i]
add $t2, $t2, $t4 //$t2 = A[i-1] +
B[i]
sw $t2, 0($t3) //A[i] =
A[i-1] + B[i]
addi $t1, $t1, 1 // i = i + 1
j Loop
//Jump to Loop
Exit:
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