OK, this is the big one. We still keep using `#include` guards only
where we absolutely need to, but with each header now being valid in
isolation, this can now actually help *minimize* the length of each
translation unit's `#include` list. Turns out that after removing all
the duplicates, we only *actually* need to guard 29 headers across all
5 games.
Part of P0285, funded by [Anonymous] and iruleatgames.
Choosing C++ RAII wrappers because there's at least one case where ZUN
misplaced a manual grcg_off(). This implementation combines safety with
the optimal instructions for both dynamic and static use cases.
Part of P0232, funded by [Anonymous].
We'd like to use this optimization in the platform layer as well.
Turning it into an inline function via __emit__() also allows us to
turn a bunch of other macros into proper inline functions.
Part of P0232, funded by [Anonymous].
What a beautiful micro-optimization! What's less beautiful though is
the fact that the segment-3 version is only used by a single function,
where it could have easily been inlined.
Part of P0192, funded by [Anonymous], nrook, and -Tom-.
nmlgc