VarAction2: Detect and replace reverse subtract via temp storage

2022-05-27 03:14:07 +01:00
parent 381aa04660
commit 145536e1fd
3 changed files with 18 additions and 0 deletions
--- a/src/newgrf_spritegroup.h
+++ b/src/newgrf_spritegroup.h
@@ -168,6 +168,7 @@ enum DeterministicSpriteGroupAdjustOperation {
 	DSGA_OP_SGE,            ///< (signed) a >= b ? 1 : 0,
 	DSGA_OP_SLE,            ///< (signed) a <= b ? 1 : 0,
 	DSGA_OP_SGT,            ///< (signed) a > b ? 1 : 0,
+	DSGA_OP_RSUB,           ///< b - a

 	DSGA_OP_SPECIAL_END,
 };