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You can use Cpulator (Online Simulator) to execute this code.
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Remember to set the stack pointer beforehand, otherwise, it might throw you an 'overflow' error. The stack pointer is typically initialized to the highest address in the data segment.
li $sp, 0x7ffffffc # Setting the stack to highest stack address
Multiplication:
First, we'll attempt to include this C logic in the MIPS assembly program for the Multiplication.
Multiply(a, b) {
int res = 0
for(int i=0;i<b;i++) res += a
}
This is a simple program that can be implemented in MIPS32.
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We are using procedures (Functions) for Division and Multiplication
Here is the code for Multiplication (MIPS32 ISA)
MULTIPLY:
# While (idx < b) result += A
add $sp, $sp, -16 # Allocating Stack Memory
sw $s3, 12($sp) # Storing register values
sw $s2, 8($sp)
sw $s1, 4($sp)
sw $s0, 0($sp)
add $s0, $zero, $zero # Result = 0
addi $s1, $zero, 0 # idx (t0) = 0
add $s2, $zero, $a0 # s2 = A
add $s3, $zero, $a1 # s3 = B
MULTIPLY_LOOP:
beq $s3, $s1, EXIT_MULTIPLY # if (idx == b) Break
add $s0, $s0, $s2 # result += A
addi $s1, $s1, 1 # idx++
j MULTIPLY_LOOP
EXIT_MULTIPLY:
add $v0, $zero, $s0 # v0 = Result
lw $s3, 12($sp) # restoring register values
lw $s2, 8($sp)
lw $s1, 4($sp)
lw $s0, 0($sp)
add $sp, $sp, 16 # restoring stack pointer
jr $ra
Division:
First, we'll attempt to include this C logic in the MIPS assembly program for the Division.
division(a, b) {
int res = 0;
while(a >= b){
a -= b;
res += 1;
}
return res;
}
Here is the code for Division (MIPS32 ISA)
DIVISION:
# While (A >= B) A -= B; result++
add $sp, $sp, -12 # Allocating Stack Memory
sw $s2, 8($sp) # Storing register values
sw $s1, 4($sp)
sw $s0, 0($sp)
addi $s0, $zero, 0 # result (s0) = 0
add $s1, $zero, $a0 # s1 = A
add $s2, $zero, $a1 # s2 = B
DIV_LOOP:
blt $s1, $s2, EXIT_DIV # If (A < B) break
sub $s1, $s1, $s2 # A -= B
addi $s0, $s0, 1 # result++
j DIV_LOOP
EXIT_DIV:
add $v0, $zero, $s0 # v0 = result
lw $s2, 8($sp) # restoring register values
lw $s1, 4($sp)
lw $s0, 0($sp)
addi $sp, $sp, 12 # restoring stack pointer
jr $ra
Conclusion:
In this article, you have learned to implement division and multiplication in Mips32 ISA