Nios II/e timing anomalies

__mulsi3 is not deterministic so if the input 'a' into that library is large it takes more time for that while loop to complete than small values of 'a'. I suspect the multiply is needed because the struct offsets are now 12 bytes instead of 8 bytes when 'c' wasn't present. As a result when calculating the index into the array it has to multiply by i*12 to get the new index instead of just increasing the index by i*8 which is just i<<3. So as 'i' increases the input into that multiplier library increases which causes the while loop to iterate more.