…Wow. A 32-element lookup table for the very computationally expensive
operation of (i * 320), needlessly limiting the amount of unique 384×80
tile sections in a stage to 32… and then TH05 further "optimizes" this
lookup by pre-multiplying all section IDs in the .STD file with the
element size of that table, to save a grand total of 1 x86 instruction.
Part of P0112, funded by [Anonymous] and Blue Bolt.
tiles_invalidate_around() must have had the hardest function signature
to figure out in all of PC-98 Touhou… because it seems impossible to
handle all three ways of passing parameters. No way around separately
declaring it in every translation unit then, with the parameter list
expected by that segment's code generation.
Part of P0089, funded by [Anonymous] and Blue Bolt.
nmlgc