decompile script_movement (#213)

* start decompiling script_movement

* finish decompiling

* delete script_movement.s

4 files changed, 228 insertions, 599 deletions

diff --git a/asm/script_movement.s b/asm/script_movement.s
deleted file mode 100644
index 72523c639..000000000
--- a/asm/script_movement.s
+++ /dev/null
@@ -1,596 +0,0 @@
-	.include "constants/gba_constants.inc"
-	.include "constants/species_constants.inc"
-	.include "asm/macros.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start exec_movement
-exec_movement: @ 80A20D4
-	push {r4,lr}
-	sub sp, 0x4
-	adds r4, r3, 0
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 24
-	lsrs r1, 24
-	lsls r2, 24
-	lsrs r2, 24
-	mov r3, sp
-	bl TryGetFieldObjectIdByLocalIdAndMap
-	lsls r0, 24
-	cmp r0, 0
-	beq _080A20F6
-	movs r0, 0x1
-	b _080A211E
-_080A20F6:
-	ldr r0, _080A2128 @ =sub_80A244C
-	bl FuncIsActiveTask
-	lsls r0, 24
-	cmp r0, 0
-	bne _080A2108
-	movs r0, 0x32
-	bl sub_80A2198
-_080A2108:
-	bl sub_80A21E0
-	lsls r0, 24
-	lsrs r0, 24
-	mov r1, sp
-	ldrb r1, [r1]
-	adds r2, r4, 0
-	bl sub_80A21F4
-	lsls r0, 24
-	lsrs r0, 24
-_080A211E:
-	add sp, 0x4
-	pop {r4}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_080A2128: .4byte sub_80A244C
-	thumb_func_end exec_movement
-
-	thumb_func_start sub_80A212C
-sub_80A212C: @ 80A212C
-	push {r4,lr}
-	sub sp, 0x4
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 24
-	lsrs r1, 24
-	lsls r2, 24
-	lsrs r2, 24
-	mov r3, sp
-	bl TryGetFieldObjectIdByLocalIdAndMap
-	lsls r0, 24
-	cmp r0, 0
-	bne _080A216E
-	bl sub_80A21E0
-	lsls r0, 24
-	lsrs r4, r0, 24
-	mov r0, sp
-	ldrb r1, [r0]
-	adds r0, r4, 0
-	bl sub_80A2260
-	lsls r0, 24
-	lsrs r1, r0, 24
-	cmp r1, 0x10
-	beq _080A216E
-	adds r0, r4, 0
-	bl sub_80A2370
-	lsls r0, 24
-	lsrs r0, 24
-	b _080A2170
-_080A216E:
-	movs r0, 0x1
-_080A2170:
-	add sp, 0x4
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80A212C
-
-	thumb_func_start sub_80A2178
-sub_80A2178: @ 80A2178
-	push {r4,lr}
-	bl sub_80A21E0
-	lsls r0, 24
-	lsrs r4, r0, 24
-	cmp r4, 0xFF
-	beq _080A2192
-	adds r0, r4, 0
-	bl sub_80A2408
-	adds r0, r4, 0
-	bl DestroyTask
-_080A2192:
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80A2178
-
-	thumb_func_start sub_80A2198
-sub_80A2198: @ 80A2198
-	push {r4,r5,lr}
-	adds r1, r0, 0
-	lsls r1, 24
-	lsrs r1, 24
-	ldr r0, _080A21D4 @ =sub_80A244C
-	bl CreateTask
-	lsls r0, 24
-	lsrs r0, 24
-	movs r2, 0x1
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r3, r1, 3
-	ldr r5, _080A21D8 @ =gTasks + 0x8
-	ldr r0, _080A21DC @ =0x0000ffff
-	adds r4, r0, 0
-_080A21B8:
-	lsls r0, r2, 1
-	adds r0, r3
-	adds r0, r5
-	ldrh r1, [r0]
-	orrs r1, r4
-	strh r1, [r0]
-	adds r0, r2, 0x1
-	lsls r0, 24
-	lsrs r2, r0, 24
-	cmp r2, 0xF
-	bls _080A21B8
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080A21D4: .4byte sub_80A244C
-_080A21D8: .4byte gTasks + 0x8
-_080A21DC: .4byte 0x0000ffff
-	thumb_func_end sub_80A2198
-
-	thumb_func_start sub_80A21E0
-sub_80A21E0: @ 80A21E0
-	push {lr}
-	ldr r0, _080A21F0 @ =sub_80A244C
-	bl FindTaskIdByFunc
-	lsls r0, 24
-	lsrs r0, 24
-	pop {r1}
-	bx r1
-	.align 2, 0
-_080A21F0: .4byte sub_80A244C
-	thumb_func_end sub_80A21E0
-
-	thumb_func_start sub_80A21F4
-sub_80A21F4: @ 80A21F4
-	push {r4-r7,lr}
-	mov r7, r9
-	mov r6, r8
-	push {r6,r7}
-	mov r9, r2
-	lsls r0, 24
-	lsrs r5, r0, 24
-	adds r7, r5, 0
-	lsls r1, 24
-	lsrs r6, r1, 24
-	mov r8, r6
-	adds r0, r5, 0
-	adds r1, r6, 0
-	bl sub_80A2260
-	lsls r0, 24
-	lsrs r4, r0, 24
-	cmp r4, 0x10
-	beq _080A2230
-	adds r0, r5, 0
-	adds r1, r4, 0
-	bl sub_80A2370
-	lsls r0, 24
-	cmp r0, 0
-	beq _080A2250
-	adds r0, r5, 0
-	adds r1, r4, 0
-	adds r2, r6, 0
-	b _080A2246
-_080A2230:
-	adds r0, r7, 0
-	movs r1, 0xFF
-	bl sub_80A2260
-	lsls r0, 24
-	lsrs r4, r0, 24
-	cmp r4, 0x10
-	beq _080A2250
-	adds r0, r7, 0
-	adds r1, r4, 0
-	mov r2, r8
-_080A2246:
-	mov r3, r9
-	bl sub_80A23C8
-	movs r0, 0
-	b _080A2252
-_080A2250:
-	movs r0, 0x1
-_080A2252:
-	pop {r3,r4}
-	mov r8, r3
-	mov r9, r4
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80A21F4
-
-	thumb_func_start sub_80A2260
-sub_80A2260: @ 80A2260
-	push {lr}
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 24
-	lsrs r3, r1, 24
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	ldr r0, _080A2284 @ =gTasks + 0x8
-	adds r1, r0
-	adds r1, 0x2
-	movs r2, 0
-_080A2278:
-	ldrb r0, [r1]
-	cmp r0, r3
-	bne _080A2288
-	adds r0, r2, 0
-	b _080A2296
-	.align 2, 0
-_080A2284: .4byte gTasks + 0x8
-_080A2288:
-	adds r0, r2, 0x1
-	lsls r0, 24
-	lsrs r2, r0, 24
-	adds r1, 0x1
-	cmp r2, 0xF
-	bls _080A2278
-	movs r0, 0x10
-_080A2296:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80A2260
-
-	thumb_func_start sub_80A229C
-sub_80A229C: @ 80A229C
-	push {lr}
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 24
-	lsrs r3, r1, 24
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	ldr r0, _080A22CC @ =gTasks + 0x8
-	adds r1, r0
-	adds r1, 0x2
-	str r1, [r2]
-	movs r0, 0
-	cmp r0, r3
-	bcs _080A22C8
-_080A22BA:
-	adds r0, 0x1
-	lsls r0, 24
-	lsrs r0, 24
-	adds r1, 0x1
-	cmp r0, r3
-	bcc _080A22BA
-	str r1, [r2]
-_080A22C8:
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080A22CC: .4byte gTasks + 0x8
-	thumb_func_end sub_80A229C
-
-	thumb_func_start sub_80A22D0
-sub_80A22D0: @ 80A22D0
-	push {r4,lr}
-	sub sp, 0x4
-	adds r4, r2, 0
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 24
-	lsrs r1, 24
-	lsls r4, 24
-	lsrs r4, 24
-	mov r2, sp
-	bl sub_80A229C
-	ldr r0, [sp]
-	strb r4, [r0]
-	add sp, 0x4
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80A22D0
-
-	thumb_func_start sub_80A22F4
-sub_80A22F4: @ 80A22F4
-	push {r4,lr}
-	sub sp, 0x4
-	adds r4, r2, 0
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 24
-	lsrs r1, 24
-	mov r2, sp
-	bl sub_80A229C
-	ldr r0, [sp]
-	ldrb r0, [r0]
-	strb r0, [r4]
-	add sp, 0x4
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80A22F4
-
-	thumb_func_start sub_80A2318
-sub_80A2318: @ 80A2318
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 24
-	ldr r2, _080A2340 @ =gBitTable
-	lsrs r1, 22
-	adds r1, r2
-	ldr r2, [r1]
-	mvns r2, r2
-	lsls r2, 16
-	lsrs r2, 16
-	ldr r3, _080A2344 @ =gTasks
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	adds r1, r3
-	ldrh r0, [r1, 0x8]
-	ands r2, r0
-	strh r2, [r1, 0x8]
-	bx lr
-	.align 2, 0
-_080A2340: .4byte gBitTable
-_080A2344: .4byte gTasks
-	thumb_func_end sub_80A2318
-
-	thumb_func_start sub_80A2348
-sub_80A2348: @ 80A2348
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 24
-	ldr r3, _080A2368 @ =gTasks
-	lsls r2, r0, 2
-	adds r2, r0
-	lsls r2, 3
-	adds r2, r3
-	ldr r0, _080A236C @ =gBitTable
-	lsrs r1, 22
-	adds r1, r0
-	ldr r0, [r1]
-	ldrh r1, [r2, 0x8]
-	orrs r0, r1
-	strh r0, [r2, 0x8]
-	bx lr
-	.align 2, 0
-_080A2368: .4byte gTasks
-_080A236C: .4byte gBitTable
-	thumb_func_end sub_80A2348
-
-	thumb_func_start sub_80A2370
-sub_80A2370: @ 80A2370
-	push {lr}
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 24
-	ldr r3, _080A2398 @ =gTasks
-	lsls r2, r0, 2
-	adds r2, r0
-	lsls r2, 3
-	adds r2, r3
-	ldr r0, _080A239C @ =gBitTable
-	lsrs r1, 22
-	adds r1, r0
-	ldr r0, [r1]
-	ldrh r1, [r2, 0x8]
-	ands r0, r1
-	cmp r0, 0
-	bne _080A23A0
-	movs r0, 0
-	b _080A23A2
-	.align 2, 0
-_080A2398: .4byte gTasks
-_080A239C: .4byte gBitTable
-_080A23A0:
-	movs r0, 0x1
-_080A23A2:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80A2370
-
-	thumb_func_start npc_obj_offscreen_culling_and_flag_update
-npc_obj_offscreen_culling_and_flag_update: @ 80A23A8
-	lsls r0, 24
-	ldr r2, _080A23B4 @ =gUnknown_020384F8
-	lsrs r0, 22
-	adds r0, r2
-	str r1, [r0]
-	bx lr
-	.align 2, 0
-_080A23B4: .4byte gUnknown_020384F8
-	thumb_func_end npc_obj_offscreen_culling_and_flag_update
-
-	thumb_func_start sub_80A23B8
-sub_80A23B8: @ 80A23B8
-	lsls r0, 24
-	ldr r1, _080A23C4 @ =gUnknown_020384F8
-	lsrs r0, 22
-	adds r0, r1
-	ldr r0, [r0]
-	bx lr
-	.align 2, 0
-_080A23C4: .4byte gUnknown_020384F8
-	thumb_func_end sub_80A23B8
-
-	thumb_func_start sub_80A23C8
-sub_80A23C8: @ 80A23C8
-	push {r4-r6,lr}
-	mov r6, r8
-	push {r6}
-	adds r5, r0, 0
-	adds r4, r1, 0
-	adds r6, r2, 0
-	mov r8, r3
-	lsls r5, 24
-	lsrs r5, 24
-	lsls r4, 24
-	lsrs r4, 24
-	lsls r6, 24
-	lsrs r6, 24
-	adds r0, r5, 0
-	adds r1, r4, 0
-	bl sub_80A2318
-	adds r0, r4, 0
-	mov r1, r8
-	bl npc_obj_offscreen_culling_and_flag_update
-	adds r0, r5, 0
-	adds r1, r4, 0
-	adds r2, r6, 0
-	bl sub_80A22D0
-	pop {r3}
-	mov r8, r3
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80A23C8
-
-	thumb_func_start sub_80A2408
-sub_80A2408: @ 80A2408
-	push {r4,r5,lr}
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	ldr r0, _080A2444 @ =gTasks + 0x8
-	adds r1, r0
-	adds r4, r1, 0x2
-	movs r5, 0
-_080A241C:
-	ldrb r0, [r4]
-	cmp r0, 0xFF
-	beq _080A2432
-	adds r1, r0, 0
-	lsls r0, r1, 3
-	adds r0, r1
-	lsls r0, 2
-	ldr r1, _080A2448 @ =gMapObjects
-	adds r0, r1
-	bl UnfreezeMapObject
-_080A2432:
-	adds r0, r5, 0x1
-	lsls r0, 24
-	lsrs r5, r0, 24
-	adds r4, 0x1
-	cmp r5, 0xF
-	bls _080A241C
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080A2444: .4byte gTasks + 0x8
-_080A2448: .4byte gMapObjects
-	thumb_func_end sub_80A2408
-
-	thumb_func_start sub_80A244C
-sub_80A244C: @ 80A244C
-	push {r4-r7,lr}
-	sub sp, 0x4
-	lsls r0, 24
-	lsrs r7, r0, 24
-	movs r5, 0
-	mov r6, sp
-_080A2458:
-	adds r0, r7, 0
-	adds r1, r5, 0
-	mov r2, sp
-	bl sub_80A22F4
-	ldrb r0, [r6]
-	cmp r0, 0xFF
-	beq _080A247C
-	adds r4, r0, 0
-	adds r0, r5, 0
-	bl sub_80A23B8
-	adds r3, r0, 0
-	adds r0, r7, 0
-	adds r1, r5, 0
-	adds r2, r4, 0
-	bl sub_80A2490
-_080A247C:
-	adds r0, r5, 0x1
-	lsls r0, 24
-	lsrs r5, r0, 24
-	cmp r5, 0xF
-	bls _080A2458
-	add sp, 0x4
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80A244C
-
-	thumb_func_start sub_80A2490
-sub_80A2490: @ 80A2490
-	push {r4-r7,lr}
-	mov r7, r8
-	push {r7}
-	adds r5, r3, 0
-	lsls r0, 24
-	lsrs r7, r0, 24
-	lsls r1, 24
-	lsrs r6, r1, 24
-	mov r8, r6
-	lsls r2, 24
-	lsrs r2, 24
-	lsls r0, r2, 3
-	adds r0, r2
-	lsls r0, 2
-	ldr r1, _080A24E0 @ =gMapObjects
-	adds r4, r0, r1
-	adds r0, r4, 0
-	bl FieldObjectIsSpecialAnimActive
-	lsls r0, 24
-	cmp r0, 0
-	beq _080A24C8
-	adds r0, r4, 0
-	bl FieldObjectClearAnimIfSpecialAnimFinished
-	lsls r0, 24
-	cmp r0, 0
-	beq _080A24FA
-_080A24C8:
-	ldrb r1, [r5]
-	cmp r1, 0xFE
-	bne _080A24E4
-	adds r0, r7, 0
-	adds r1, r6, 0
-	bl sub_80A2348
-	adds r0, r4, 0
-	bl FreezeMapObject
-	b _080A24FA
-	.align 2, 0
-_080A24E0: .4byte gMapObjects
-_080A24E4:
-	adds r0, r4, 0
-	bl FieldObjectSetSpecialAnim
-	lsls r0, 24
-	cmp r0, 0
-	bne _080A24FA
-	adds r5, 0x1
-	mov r0, r8
-	adds r1, r5, 0
-	bl npc_obj_offscreen_culling_and_flag_update
-_080A24FA:
-	pop {r3}
-	mov r8, r3
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80A2490
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/include/asm.inc.h b/include/asm.inc.h
index bfc902ffb..482f4d91f 100644
--- a/include/asm.inc.h
+++ b/include/asm.inc.h
@@ -96,7 +96,7 @@ void sub_8060288(u8, u8, u8);
 void sub_80603CC(s16 x, s16 y, s16 *pInt, s16 *pInt1);
 void FieldObjectMoveDestCoords(struct MapObject *pObject, u8 unk_19, s16 *pInt, s16 *pInt1);
 bool8 FieldObjectIsSpecialAnimOrDirectionSequenceAnimActive(struct MapObject *);
-void FieldObjectSetSpecialAnim(struct MapObject *, u8);
+bool8 FieldObjectSetSpecialAnim(struct MapObject *, u8);
 void FieldObjectForceSetSpecialAnim(struct MapObject *pObject, u8 a);
 void FieldObjectClearAnimIfSpecialAnimActive(struct MapObject *);
 void FieldObjectClearAnim(struct MapObject *);
@@ -236,7 +236,7 @@ void sub_809D608(u16);
 u8 pokemon_ailments_get_primary(u32);
 
 // asm/script_movement.o
-u8 exec_movement(u8, u8, u8, void *);
+bool8 exec_movement(u8, u8, u8, u8 *);
 bool8 sub_80A212C(u8, u8, u8);
 void sub_80A2178(void);
 
diff --git a/ld_script.txt b/ld_script.txt
index c133233ff..1af54ea2b 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -138,7 +138,7 @@ SECTIONS {
         asm/pokemon_summary_screen.o(.text);
         src/pokemon_summary_screen.o(.text);
         asm/pokemon_summary_screen.o(.text_80A0958);
-        asm/script_movement.o(.text);
+        src/script_movement.o(.text);
         asm/fldeff_cut.o(.text);
         asm/mail_data.o(.text);
         src/map_name_popup.o(.text);
diff --git a/src/script_movement.c b/src/script_movement.c
new file mode 100644
index 000000000..781235986
--- /dev/null
+++ b/src/script_movement.c
@@ -0,0 +1,225 @@
+#include "global.h"
+#include "asm.h"
+#include "task.h"
+
+extern const u32 gBitTable[];
+extern u8 *gUnknown_020384F8[];
+
+extern void UnfreezeMapObject(struct MapObject *);
+extern bool8 FieldObjectIsSpecialAnimActive(struct MapObject *);
+
+static void sub_80A2198(u8);
+static u8 sub_80A21E0(void);
+static bool8 sub_80A21F4(u8, u8, u8 *);
+static u8 sub_80A2260(u8, u8);
+static bool8 sub_80A2370(u8, u8);
+static void sub_80A23C8(u8, u8, u8, u8 *);
+static void sub_80A2408(u8);
+static void Task_80A244C(u8);
+static void sub_80A2490(u8, u8, u8, u8 *);
+
+bool8 exec_movement(u8 a, u8 b, u8 c, u8 *d)
+{
+    u8 mapObjId;
+    
+    if (TryGetFieldObjectIdByLocalIdAndMap(a, b, c, &mapObjId))
+        return TRUE;
+    if (!FuncIsActiveTask(Task_80A244C))
+        sub_80A2198(50);
+    return sub_80A21F4(sub_80A21E0(), mapObjId, d);
+}
+
+bool8 sub_80A212C(u8 a, u8 b, u8 c)
+{
+    u8 mapObjId;
+    u8 r4;
+    u8 r1;
+    
+    if (TryGetFieldObjectIdByLocalIdAndMap(a, b, c, &mapObjId))
+        return 1;
+    r4 = sub_80A21E0();
+    r1 = sub_80A2260(r4, mapObjId);
+    if (r1 == 16)
+        return 1;
+    return sub_80A2370(r4, r1);
+}
+
+void sub_80A2178(void)
+{
+    u8 taskId;
+    
+    taskId = sub_80A21E0();
+    if (taskId != 0xFF)
+    {
+        sub_80A2408(taskId);
+        DestroyTask(taskId);
+    }
+}
+
+static void sub_80A2198(u8 priority)
+{
+    u8 taskId;
+    u8 i;
+    
+    taskId = CreateTask(Task_80A244C, priority);
+    for (i = 1; i < 16; i++)
+        gTasks[taskId].data[i] = 0xFFFF;
+}
+
+static u8 sub_80A21E0(void)
+{
+    return FindTaskIdByFunc(Task_80A244C);
+}
+
+static bool8 sub_80A21F4(u8 taskId, u8 b, u8 *c)
+{
+    u8 r4;
+    
+    r4 = sub_80A2260(taskId, b);
+    if (r4 != 16)
+    {
+        if (sub_80A2370(taskId, r4) == 0)
+            return TRUE;
+        else
+        {
+            sub_80A23C8(taskId, r4, b, c);
+            return FALSE;
+        }
+    }
+    r4 = sub_80A2260(taskId, 0xFF);
+    if (r4 == 16)
+        return TRUE;
+    else
+    {
+        sub_80A23C8(taskId, r4, b, c);
+        return FALSE;
+    }
+}
+
+static u8 sub_80A2260(u8 taskId, u8 b)
+{
+    u8 *ptr;
+    u8 i;
+    
+    ptr = (u8 *)&gTasks[taskId].data[1];
+    for (i = 0; i < 16; i++, ptr++)
+    {
+        if (*ptr == b)
+            return i;
+    }
+    return 16;
+}
+
+static void sub_80A229C(u8 taskId, u8 b, u8 **c)
+{
+    u8 i;
+    
+    *c = (u8 *)&gTasks[taskId].data[1];
+    for (i = 0; i < b; i++, (*c)++)
+        ;
+}
+
+static void sub_80A22D0(u8 taskId, u8 b, u8 c)
+{
+    u8 *ptr;
+    
+    sub_80A229C(taskId, b, &ptr);
+    *ptr = c;  //what is this supposed to do?
+}
+
+static void sub_80A22F4(u8 taskId, u8 b, u8 *c)
+{
+    u8 *ptr;
+    
+    sub_80A229C(taskId, b, &ptr);
+    *c = *ptr;
+}
+
+static void sub_80A2318(u8 a, u8 b)
+{
+    u16 var = ~gBitTable[b];
+    
+    gTasks[a].data[0] &= var;
+}
+
+static void sub_80A2348(u8 taskId, u8 b)
+{
+    gTasks[taskId].data[0] |= gBitTable[b];
+}
+
+static bool8 sub_80A2370(u8 taskId, u8 b)
+{
+    u16 var = (u16)gTasks[taskId].data[0] & gBitTable[b];
+
+    if (var != 0)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+static void npc_obj_offscreen_culling_and_flag_update(u8 a, u8 *b)
+{
+    gUnknown_020384F8[a] = b;
+}
+
+static u8 *sub_80A23B8(u8 a)
+{
+    return gUnknown_020384F8[a];
+}
+
+static void sub_80A23C8(u8 taskId, u8 b, u8 c, u8 *d)
+{
+    sub_80A2318(taskId, b);
+    npc_obj_offscreen_culling_and_flag_update(b, d);
+    sub_80A22D0(taskId, b, c);
+}
+
+static void sub_80A2408(u8 a)
+{
+    u8 *ptr;
+    u8 i;
+    
+    ptr = (u8 *)&gTasks[a].data[1];
+    for (i = 0; i < 16; i++, ptr++)
+    {
+        if (*ptr != 0xFF)
+            UnfreezeMapObject(&gMapObjects[*ptr]);
+    }
+}
+
+static void Task_80A244C(u8 taskId)
+{
+    u8 i;
+    u8 var;
+    
+    for (i = 0; i < 16; i++)
+    {
+        sub_80A22F4(taskId, i, &var);
+        if (var != 0xFF)
+            sub_80A2490(taskId, i, var, sub_80A23B8(i));
+    }
+}
+
+static void sub_80A2490(u8 taskId, u8 b, u8 c, u8 *d)
+{
+    u8 var;
+    
+    if (FieldObjectIsSpecialAnimActive(&gMapObjects[c])
+     && !FieldObjectClearAnimIfSpecialAnimFinished(&gMapObjects[c]))
+        return;
+    
+    var = *d;
+    if (var == 0xFE)
+    {
+        sub_80A2348(taskId, b);
+        FreezeMapObject(&gMapObjects[c]);
+    }
+    else
+    {
+        if (!FieldObjectSetSpecialAnim(&gMapObjects[c], var))
+        {
+            d++;
+            npc_obj_offscreen_culling_and_flag_update(b, d);
+        }
+    }
+}