Question

1. [2 points] Write a MIPS assembly language program of the following C function and the code to call the function: int leaf_example (int g, h, i, j) { int f; f = (g + h) - (i + j); return f; مهه Arguments g, h, i, and j are passed to the function in registers $a0, $al, Şa2, and $a3, respectively while f in $50 (hence, need to save $50 on stack), and the result is to be stored in $v0. Also provide the code to call the function and the variables g, h, i, j should be assigned the values 5, 10, 15, and 20 respectively. No need to provide setup code (e.g., instructions to the assembler), just provide the assembly code.

Answer 1

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code snippet

mips01.asm 1 لا لا 3 4 main: li $a0,5 #load all with 5 li $ al, 10 #load al with 5 li $ a2,15 #load a 2 with 5 li $ a3,20 #load a3 with 5 5 6 7 jal leaf_example 8 9 li $v0,10 #terminate syscall 10 11 12 13 14 15 6 17 18 19 20 21 22 leaf_example: add $sp,$sp,-4 sw $50,($sp) #save so to stack add $t0, $a0, $al #get g+h add $t1,$a 2, $a3 #get i + j sub $50, $t0,$t1 #get (g+h)-(i+j) move $v0, $s0 #move result to vo lw $50, ($sp) #load data back to so add $sp,$sp,4 jr $ra

code

main:
li $a0,5 #load a0 with 5
li $a1,10 #load a1 with 5
li $a2,15 #load a2 with 5
li $a3,20 #load a3 with 5

jal leaf_example

li $v0,10 #terminate
syscall

leaf_example:
add $sp,$sp,-4
sw $s0,($sp) #save s0 to stack
add $t0,$a0,$a1 #get g+h
add $t1,$a2,$a3 #get i + j
sub $s0,$t0,$t1 #get (g+h)-(i+j)
move $v0,$s0 #move result to v0
lw $s0,($sp) #load data back to s0
add $sp,$sp,4
jr $ra