>>32
Unions are used when you want to re-interpet a value instead of just changing it. Examples of this would be some of the older malloc implementions.
mostly
Bullshit. Compile a piece a code that the optimizations turned off. Then look at the assembly generated by this code. Now do the same thing with full optimiztions.
See 2.
No. Have you ever written production level C code?
Yeah, you missed the point.
You're a fucking moron.
How do you divmod in C? On x86 it is just one instruction.