64 bit nonsense

switch (swi) {
  case 0: DoThis(); break;
  case 1: DoThat(); break;
  ... etc.
}

It’s a shame there’s no such thing as a ranged switch clause. Could be useful for OS_WriteI…

Or maybe even an outer switch construct a that breaks them down as “these ones are OS, these ones are Wimp…” without so many overheads as daisy chaining if clauses.
Note: gcc supports this, using syntax like case 1 ... 3 : etc. Could this be added to Norcroft?

There is. Note to self: read the whole post before responding!

case OSTask_Yield ... OSTask_Yield + 63:

Perhaps it’s time to move to gcc.

Note: gcc supports this, using syntax like case 1 … 3 : etc.

That looks a bit “nicer” than the C# syntax of case > 0 and <= 3:¹, although I imagine that C# is a bit more flexible when you’re doing something more complex.

¹ What is that and doing there? This isn’t VB!

Your outer case can just clear the bottom 6 bits of the SWI number to get the module base.