No - there is no way to force any 'C' compiler to generate any specific machine instructions. That's the whole point.

If it really matters that much to you (and you may well have good reasons), then you will have to write this particular function in Assembler.

If you need specific machine instructions, there is no point in messing about trying to coerce a 'C' compiler - and run the risk that it might change due to side effects of other code, or option changes, or compiler updates, or any number of other reasons.

The only way to guarantee specific machine instructions is to use assembler.

There is no problem in calling 'C' from assembler - there's a whole section in the Manual on how to do it.