Assembly Code Pep8 Question Write a Pep8 subroutine that is

Assembly Code Pep/8 Question

Write a Pep/8 subroutine that is equivalent to the following C function int Q2 (int A, int B) {int M, C = 0; M = (A + B)/2; while (M > 0) {C += 3; M--;} return C;}

Solution

Answer:

MIPS Assembly Language Code :

L0:
push rbp
mov rbp, rsp
mov DWORD PTR [rbp-20], edi
mov DWORD PTR [rbp-24], esi
mov DWORD PTR [rbp-8], 0
mov edx, DWORD PTR [rbp-20]
mov eax, DWORD PTR [rbp-24]
add eax, edx
mov edx, eax
shr edx, 31
add eax, edx
sar eax
mov DWORD PTR [rbp-4], eax
.L3:
cmp DWORD PTR [rbp-4], 0
jle .L2
add DWORD PTR [rbp-8], 3
sub DWORD PTR [rbp-4], 1
jmp .L3
.L2:
mov eax, DWORD PTR [rbp-8]
pop rbp
ret