Variables

1. Be cognizant of when to use a location in memory rather than a register, especially when writing code on paper.
   • int is equivalent to word, char is equivalent to byte, etc.

Math

1. If multiplying or dividing by 2^n, use the appropriate shift instructions.

Example Q: Write the following pseudocode in assembly:

int total, n = 100
t0 = 1
t1 = 1
while (t1 <= n) {
  t0 += t1
  t1++
}
total = t0

A:

# Wrong
add   $t3, $t5, $t6
mul   $t3, $t3, 4
sub   $t3, $t4. $t3
# Correct
add   $t3, $t5, $t6
sll   $t3, $t3, 2
sub   $t3, $t4. $t3