the macros must unfortunately stay as they are because we need to avoid
unnecessary function calls on heavy code paths of execution.
Actually, I've had to add more of them recently to enable change of resolution
in arc cosine table creation (this is used if FASTMATH is defined).
To ease debugging you may wish to compile module with -E flag,
this will expand macros.
I am going to complete FS-8875 in coming week. Most likely this will simply comes
down to another option in options header (which if enabled will avoid computing
of arcus cosine) plus some minor adjustments to make the rest of the code reflect
that change.
cheers,
Piotr