4 ms·
why would you need that in this case?
by foxhill 8y ago
why would you need that in this case?
- saagarjha 8y agoProbably so the compiler doesn't just optimize out the statements, seeing as they don't seem to have a visible effect on the program execution because they're never read again.
- Taniwha 8y agobecause writing to one location causes the data to change in another (a system register) you don't want the compiler to assume that data in an IO register can be cached in a CPU register