Fixed point

[kiedtl]

In-progress on the fixpt branch.

TODO:

• Basic addition/subtraction
• Multiplication, division
• Printing
• Better division routine that uses multi-word division rather than multiplying by the reciprocal
• CORDIC sin/cos
• Wrapper for CORDIC sin/cos that has a larger domain
• Natural log
• Exponentiation
• Powers
• Ceil, floor, round
• Lexer/parser support for fixed point literals(?)

[kiedtl]

Unsure if fixed point literals baked into the compiler are a good idea. If there's a way for modules to "claim" a literal suffix, with custom parsing code, that would be nice. Would probably be too complicated to implement however.

As for the syntax, if it is added: 3.14fs or 3.14xs? F for fixed point, x for... fixed point. (Reserving f for a future half-float type.) S for short, of course.