How to code this function in MIPS?

int nested_loop_test(int n){

int rv = 1;

for(int i = 1; i < n;i*=2)

for(int j = i; j >=0; j--)

if(j % 2 == 0)

rv += (i + j);

else

rv += (2*i-3*j);

return rv;

}