state_to_direction memes

asm/field_map_obj.s

@@ -5,58 +5,6 @@
 
 	.text
 
-	thumb_func_start zffu_offset_calc
-zffu_offset_calc: @ 8093834
-	lsls r0, 24
-	lsls r1, 24
-	lsrs r1, 24
-	ldr r2, =gUnknown_0850DC2F
-	lsrs r0, 22
-	subs r0, 0x5
-	adds r1, r0
-	adds r1, r2
-	ldrb r0, [r1]
-	bx lr
-	.pool
-	thumb_func_end zffu_offset_calc
-
-	thumb_func_start state_to_direction
-state_to_direction: @ 809384C
-	push {r4,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	lsls r1, 24
-	lsrs r1, 24
-	adds r0, r1, 0
-	lsls r2, 24
-	lsrs r2, 24
-	cmp r1, 0
-	beq _0809386C
-	cmp r2, 0
-	beq _0809386C
-	cmp r1, 0x4
-	bhi _0809386C
-	cmp r2, 0x4
-	bls _08093870
-_0809386C:
-	movs r0, 0
-	b _08093882
-_08093870:
-	adds r1, r2, 0
-	bl zffu_offset_calc
-	ldr r2, =gUnknown_0850DC3F
-	lsls r1, r4, 2
-	subs r1, 0x5
-	adds r0, r1
-	adds r0, r2
-	ldrb r0, [r0]
-_08093882:
-	pop {r4}
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end state_to_direction
-
 	thumb_func_start FieldObjectExecSpecialAnim
 @ void FieldObjectExecSpecialAnim(struct npc_state *fieldObject, struct obj *object)
 FieldObjectExecSpecialAnim: @ 809388C

include/data3.h

@@ -36,7 +36,9 @@ extern const u8 gUnknown_0850D8E8[4];
 extern bool8 (*const gUnknown_0850DA64[])(struct MapObject *, struct Sprite *, u8, bool8(u8));
 extern bool8 (*const gUnknown_0850DB5C[])(u8);
 extern bool8 (*const gUnknown_0850DB6C[])(u8);
-extern struct Coords16 gUnknown_0850DB7C[4];
+extern const struct Coords16 gUnknown_0850DB7C[4];
+extern const u8 gUnknown_0850DC2F[4][4];
+extern const u8 gUnknown_0850DC3F[4][4];
 
 extern const u8 gUnknown_0850DBA0[5];
 

src/field_map_obj.c

@@ -4072,3 +4072,21 @@ u8 GetOppositeDirection(u8 direction)
     }
     return directions[direction - 1];
 }
+
+u32 zffu_offset_calc(u8 a0, u8 a1)
+{
+    return gUnknown_0850DC2F[a0 - 1][a1 - 1];
+}
+
+u32 state_to_direction(u8 a0, u32 a1, u32 a2)
+{
+    u32 zffuOffset;
+    u8 a1_2 = a1;
+    u8 a2_2 = a2;
+    if (a1_2 == 0 || a2_2 == 0 || a1_2 > DIR_EAST || a2_2 > DIR_EAST)
+    {
+        return 0;
+    }
+    zffuOffset = zffu_offset_calc(a1_2, a2);
+    return gUnknown_0850DC3F[a0 - 1][zffuOffset - 1];
+}