sub_081564D8

asm/code_08153060.s

@@ -6931,633 +6931,3 @@ _081564C0:
 	.align 2, 0
 _081564D0: .4byte gUnk_030039A4
 _081564D4: .4byte gUnk_03002EC0
-
-	thumb_func_start sub_081564D8
-sub_081564D8: @ 0x081564D8
-	push {r4, r5, r6, r7, lr}
-	mov r7, sl
-	mov r6, sb
-	mov r5, r8
-	push {r5, r6, r7}
-	sub sp, #0x38
-	mov sl, r0
-	movs r0, #0
-	str r0, [sp, #0x20]
-	movs r1, #0
-	str r1, [sp, #0x24]
-	movs r2, #0
-	str r2, [sp, #0x28]
-	movs r3, #0
-	str r3, [sp, #0x2c]
-	movs r4, #0
-	str r4, [sp, #0x30]
-	mov r0, sl
-	ldr r4, [r0, #4]
-	movs r0, #1
-	rsbs r0, r0, #0
-	cmp r4, r0
-	bne _08156508
-	b _08156988
-_08156508:
-	lsrs r0, r4, #0x1c
-	cmp r0, #0
-	bne _08156530
-	ldr r3, _0815652C @ =gUnk_03003674
-	ldr r0, [r3]
-	mov r1, sl
-	ldrh r2, [r1, #0xc]
-	ldr r0, [r0, #4]
-	lsls r1, r2, #2
-	adds r1, r1, r0
-	lsls r0, r4, #1
-	adds r0, r0, r4
-	lsls r0, r0, #2
-	ldr r1, [r1]
-	adds r1, r1, r0
-	mov sb, r1
-	b _08156546
-	.align 2, 0
-_0815652C: .4byte gUnk_03003674
-_08156530:
-	ldr r3, _081565E4 @ =gUnk_03003674
-	ldr r0, [r3]
-	mov r1, sl
-	ldrh r2, [r1, #0xc]
-	ldr r1, [r0, #4]
-	lsls r0, r2, #2
-	adds r0, r0, r1
-	lsls r1, r4, #4
-	ldr r0, [r0]
-	adds r0, r0, r1
-	mov sb, r0
-_08156546:
-	mov r4, sb
-	ldrh r0, [r4, #2]
-	mov r1, sl
-	strb r0, [r1, #0x1e]
-	movs r0, #0x10
-	ldrsh r4, [r1, r0]
-	str r4, [sp, #8]
-	movs r4, #0x12
-	ldrsh r1, [r1, r4]
-	str r1, [sp, #0xc]
-	mov r0, sl
-	ldr r1, [r0, #8]
-	movs r0, #0x80
-	lsls r0, r0, #0xa
-	ands r0, r1
-	adds r5, r1, #0
-	cmp r0, #0
-	beq _08156580
-	ldr r0, _081565E8 @ =gUnk_030023F4
-	movs r4, #0
-	ldrsh r1, [r0, r4]
-	ldr r4, [sp, #8]
-	subs r4, r4, r1
-	str r4, [sp, #8]
-	movs r1, #2
-	ldrsh r0, [r0, r1]
-	ldr r4, [sp, #0xc]
-	subs r4, r4, r0
-	str r4, [sp, #0xc]
-_08156580:
-	mov r0, sb
-	ldrh r0, [r0, #4]
-	str r0, [sp, #0x10]
-	mov r1, sb
-	ldrh r1, [r1, #6]
-	str r1, [sp, #0x14]
-	movs r0, #0x20
-	ands r0, r5
-	cmp r0, #0
-	beq _081565EC
-	movs r4, #0x80
-	lsls r4, r4, #1
-	adds r0, r4, #0
-	ldr r1, [sp, #0x20]
-	orrs r1, r0
-	str r1, [sp, #0x20]
-	movs r0, #0x1f
-	ands r0, r5
-	lsls r0, r0, #9
-	ldr r4, [sp, #0x24]
-	orrs r4, r0
-	str r4, [sp, #0x24]
-	movs r0, #0x40
-	ands r0, r5
-	cmp r0, #0
-	beq _08156662
-	ldr r1, [sp, #0x10]
-	lsrs r0, r1, #1
-	ldr r4, [sp, #8]
-	subs r4, r4, r0
-	str r4, [sp, #8]
-	ldr r1, [sp, #0x14]
-	lsrs r0, r1, #1
-	ldr r4, [sp, #0xc]
-	subs r4, r4, r0
-	str r4, [sp, #0xc]
-	ldr r0, [sp, #0x10]
-	lsls r0, r0, #1
-	str r0, [sp, #0x10]
-	lsls r1, r1, #1
-	str r1, [sp, #0x14]
-	movs r1, #0x80
-	lsls r1, r1, #2
-	adds r0, r1, #0
-	ldr r4, [sp, #0x20]
-	orrs r4, r0
-	lsls r0, r4, #0x10
-	lsrs r0, r0, #0x10
-	str r0, [sp, #0x20]
-	b _08156662
-	.align 2, 0
-_081565E4: .4byte gUnk_03003674
-_081565E8: .4byte gUnk_030023F4
-_081565EC:
-	movs r0, #0x80
-	lsls r0, r0, #4
-	ands r0, r5
-	cmp r0, #0
-	beq _08156608
-	mov r1, sb
-	movs r4, #0xa
-	ldrsh r0, [r1, r4]
-	ldr r1, [sp, #0x14]
-	subs r0, r1, r0
-	ldr r4, [sp, #0xc]
-	subs r4, r4, r0
-	str r4, [sp, #0xc]
-	b _08156614
-_08156608:
-	mov r1, sb
-	movs r4, #0xa
-	ldrsh r0, [r1, r4]
-	ldr r1, [sp, #0xc]
-	subs r1, r1, r0
-	str r1, [sp, #0xc]
-_08156614:
-	movs r0, #0x80
-	lsls r0, r0, #3
-	ands r0, r5
-	cmp r0, #0
-	beq _08156630
-	mov r4, sb
-	movs r1, #8
-	ldrsh r0, [r4, r1]
-	ldr r4, [sp, #0x10]
-	subs r0, r4, r0
-	ldr r1, [sp, #8]
-	subs r1, r1, r0
-	str r1, [sp, #8]
-	b _0815663C
-_08156630:
-	mov r4, sb
-	movs r1, #8
-	ldrsh r0, [r4, r1]
-	ldr r4, [sp, #8]
-	subs r4, r4, r0
-	str r4, [sp, #8]
-_0815663C:
-	lsrs r0, r5, #0xb
-	movs r6, #1
-	ands r0, r6
-	mov r4, sb
-	ldrh r1, [r4]
-	lsls r4, r1, #0x10
-	lsrs r1, r4, #0x1f
-	cmp r0, r1
-	beq _08156652
-	movs r0, #1
-	str r0, [sp, #0x2c]
-_08156652:
-	lsrs r1, r5, #0xa
-	lsrs r0, r4, #0x1e
-	eors r0, r1
-	ands r0, r6
-	cmp r0, #0
-	beq _08156662
-	movs r1, #1
-	str r1, [sp, #0x30]
-_08156662:
-	ldr r4, [sp, #0x10]
-	cmp r4, #0
-	beq _0815668A
-	ldr r1, [sp, #8]
-	adds r0, r1, r4
-	cmp r0, #0
-	bge _08156672
-	b _08156988
-_08156672:
-	cmp r1, #0xf0
-	ble _08156678
-	b _08156988
-_08156678:
-	ldr r4, [sp, #0xc]
-	ldr r1, [sp, #0x14]
-	adds r0, r4, r1
-	cmp r0, #0
-	bge _08156684
-	b _08156988
-_08156684:
-	cmp r4, #0xa0
-	ble _0815668A
-	b _08156988
-_0815668A:
-	mov r4, sl
-	ldrb r1, [r4, #0x1f]
-	lsls r1, r1, #0xc
-	ldr r0, [sp, #0x28]
-	adds r1, r0, r1
-	lsls r1, r1, #0x10
-	movs r0, #0xc0
-	lsls r0, r0, #1
-	ands r0, r5
-	lsls r0, r0, #3
-	ldr r4, [sp, #0x20]
-	orrs r4, r0
-	str r4, [sp, #0x20]
-	movs r0, #0xc0
-	lsls r0, r0, #6
-	ands r0, r5
-	lsls r0, r0, #0xe
-	orrs r0, r1
-	lsrs r0, r0, #0x10
-	str r0, [sp, #0x28]
-	ldr r0, [r3]
-	ldr r1, [r0, #8]
-	lsls r0, r2, #2
-	adds r0, r0, r1
-	ldr r0, [r0]
-	str r0, [sp, #0x1c]
-	ldr r0, _0815687C @ =gUnk_030024F0
-	ldrb r0, [r0]
-	mov r1, sl
-	strb r0, [r1, #0x1d]
-	movs r2, #0
-	str r2, [sp, #0x18]
-	mov r3, sb
-	ldrh r3, [r3, #2]
-	cmp r2, r3
-	blo _081566D4
-	b _08156834
-_081566D4:
-	ldr r4, _08156880 @ =0x040000D4
-	mov r8, r4
-	mov r4, sp
-_081566DA:
-	mov r1, sb
-	ldrh r0, [r1]
-	ldr r2, _08156884 @ =0x00003FFF
-	adds r1, r2, #0
-	ands r1, r0
-	ldr r3, [sp, #0x18]
-	adds r1, r1, r3
-	lsls r0, r1, #1
-	adds r0, r0, r1
-	lsls r0, r0, #1
-	ldr r1, [sp, #0x1c]
-	adds r0, r1, r0
-	mov r2, r8
-	str r0, [r2]
-	mov r3, sp
-	str r3, [r2, #4]
-	ldr r0, _08156888 @ =0x80000003
-	str r0, [r2, #8]
-	ldr r0, [r2, #8]
-	ldrh r2, [r4, #2]
-	ldr r1, _0815688C @ =0x000001FF
-	adds r0, r1, #0
-	adds r6, r0, #0
-	ands r6, r2
-	cmp r6, #0xff
-	ble _08156712
-	ldr r3, _08156890 @ =0xFFFFFE00
-	adds r6, r6, r3
-_08156712:
-	ldrh r0, [r4]
-	ldrb r5, [r4]
-	cmp r5, #0x7f
-	ble _0815671E
-	ldr r1, _08156894 @ =0xFFFFFF00
-	adds r5, r5, r1
-_0815671E:
-	movs r1, #0xfe
-	lsls r1, r1, #8
-	adds r3, r1, #0
-	ands r3, r2
-	strh r3, [r4, #2]
-	ands r1, r0
-	strh r1, [r4]
-	movs r2, #0xc0
-	lsls r2, r2, #8
-	ands r1, r2
-	lsrs r1, r1, #0xc
-	adds r0, r3, #0
-	ands r0, r2
-	lsrs r0, r0, #0xe
-	orrs r1, r0
-	ldr r2, _08156898 @ =gUnk_08D6084C
-	lsls r1, r1, #1
-	adds r0, r2, #1
-	adds r0, r1, r0
-	ldrb r7, [r0]
-	adds r1, r1, r2
-	ldrb r1, [r1]
-	mov ip, r1
-	ldr r0, [sp, #0x2c]
-	ldr r1, [sp, #0x30]
-	orrs r0, r1
-	cmp r0, #0
-	beq _08156788
-	ldr r2, [sp, #0x2c]
-	cmp r2, #0
-	beq _0815676E
-	movs r1, #0x80
-	lsls r1, r1, #6
-	adds r0, r1, #0
-	adds r1, r3, #0
-	eors r1, r0
-	strh r1, [r4, #2]
-	ldr r2, [sp, #0x14]
-	subs r0, r2, r7
-	subs r5, r0, r5
-_0815676E:
-	ldr r3, [sp, #0x30]
-	cmp r3, #0
-	beq _08156788
-	ldrh r0, [r4, #2]
-	movs r2, #0x80
-	lsls r2, r2, #5
-	adds r1, r2, #0
-	eors r0, r1
-	strh r0, [r4, #2]
-	ldr r3, [sp, #0x10]
-	mov r1, ip
-	subs r0, r3, r1
-	subs r6, r0, r6
-_08156788:
-	ldr r2, [sp, #0xc]
-	adds r1, r2, r5
-	adds r0, r1, r7
-	cmp r0, #0
-	blt _08156820
-	cmp r1, #0xa0
-	bgt _08156820
-	ldr r3, [sp, #8]
-	adds r2, r3, r6
-	mov r3, ip
-	adds r0, r2, r3
-	cmp r0, #0
-	blt _08156820
-	cmp r2, #0xf0
-	bgt _08156820
-	movs r0, #0xff
-	ands r1, r0
-	ldrh r0, [r4]
-	adds r1, r1, r0
-	ldr r3, _0815688C @ =0x000001FF
-	adds r0, r3, #0
-	ands r2, r0
-	ldrh r0, [r4, #2]
-	adds r0, r0, r2
-	ldr r2, [sp, #0x20]
-	orrs r1, r2
-	strh r1, [r4]
-	ldr r3, [sp, #0x24]
-	orrs r0, r3
-	strh r0, [r4, #2]
-	ldrh r0, [r4, #4]
-	ldr r2, [sp, #0x28]
-	orrs r2, r0
-	strh r2, [r4, #4]
-	movs r3, #0x80
-	lsls r3, r3, #6
-	adds r0, r3, #0
-	ands r1, r0
-	cmp r1, #0
-	beq _081567E4
-	ldr r0, _0815689C @ =0x000003FF
-	adds r1, r0, #0
-	adds r0, r2, #0
-	ands r0, r1
-	adds r0, r2, r0
-	strh r0, [r4, #4]
-_081567E4:
-	mov r1, sl
-	ldr r0, [r1]
-	ldr r2, _081568A0 @ =0xF9FF0000
-	adds r0, r0, r2
-	lsrs r0, r0, #5
-	ldrh r3, [r4, #4]
-	adds r0, r0, r3
-	strh r0, [r4, #4]
-	ldrh r0, [r1, #0x14]
-	movs r2, #0xf8
-	lsls r2, r2, #3
-	adds r1, r2, #0
-	ands r0, r1
-	lsrs r0, r0, #6
-	bl sub_08156D84
-	adds r1, r0, #0
-	ldr r0, _081568A4 @ =gUnk_03006CC4
-	ldr r0, [r0]
-	cmp r0, r1
-	bne _08156810
-	b _08156988
-_08156810:
-	mov r3, sp
-	mov r0, r8
-	str r3, [r0]
-	str r1, [r0, #4]
-	ldr r0, _08156888 @ =0x80000003
-	mov r1, r8
-	str r0, [r1, #8]
-	ldr r0, [r1, #8]
-_08156820:
-	ldr r0, [sp, #0x18]
-	adds r0, #1
-	lsls r0, r0, #0x18
-	lsrs r0, r0, #0x18
-	str r0, [sp, #0x18]
-	mov r2, sb
-	ldrh r2, [r2, #2]
-	cmp r0, r2
-	bhs _08156834
-	b _081566DA
-_08156834:
-	mov r3, sl
-	ldr r0, [r3, #4]
-	lsrs r0, r0, #0x1c
-	cmp r0, #1
-	beq _08156840
-	b _08156988
-_08156840:
-	ldr r1, [r3, #8]
-	movs r0, #0x80
-	lsls r0, r0, #0x13
-	ands r0, r1
-	cmp r0, #0
-	bne _0815684E
-	b _08156988
-_0815684E:
-	ldr r0, _081568A8 @ =0xFBFFFFFF
-	ands r1, r0
-	str r1, [r3, #8]
-	mov r4, sb
-	ldr r0, [r4, #0xc]
-	ldr r1, _081568AC @ =0x00FFFFFF
-	ands r1, r0
-	lsrs r0, r0, #0x18
-	str r0, [sp, #0x34]
-	ldr r0, _081568B0 @ =gUnk_03003674
-	ldr r2, [r0]
-	lsls r1, r1, #2
-	ldr r0, [r2, #0x18]
-	adds r0, r0, r1
-	mov ip, r0
-	ldr r0, [r0]
-	cmp r0, #0
-	blt _081568B4
-	movs r0, #0x20
-	mov r8, r0
-	ldr r2, [r2, #0x10]
-	b _081568BA
-	.align 2, 0
-_0815687C: .4byte gUnk_030024F0
-_08156880: .4byte 0x040000D4
-_08156884: .4byte 0x00003FFF
-_08156888: .4byte 0x80000003
-_0815688C: .4byte 0x000001FF
-_08156890: .4byte 0xFFFFFE00
-_08156894: .4byte 0xFFFFFF00
-_08156898: .4byte gUnk_08D6084C
-_0815689C: .4byte 0x000003FF
-_081568A0: .4byte 0xF9FF0000
-_081568A4: .4byte gUnk_03006CC4
-_081568A8: .4byte 0xFBFFFFFF
-_081568AC: .4byte 0x00FFFFFF
-_081568B0: .4byte gUnk_03003674
-_081568B4:
-	movs r1, #0x40
-	mov r8, r1
-	ldr r2, [r2, #0x14]
-_081568BA:
-	mov sb, r2
-	mov r3, r8
-	mov r2, ip
-	adds r2, #4
-	mov ip, r2
-	subs r2, #4
-	ldm r2!, {r0}
-	muls r0, r3, r0
-	mov r4, sb
-	adds r2, r4, r0
-	mov r0, sl
-	ldr r6, [r0]
-	movs r7, #1
-	ldr r1, [sp, #0x34]
-	cmp r7, r1
-	bhs _08156950
-	ldr r4, _08156904 @ =gUnk_03002EC0
-	mov sl, r4
-	ldr r5, _08156908 @ =gUnk_030039A4
-_081568E0:
-	mov r1, ip
-	adds r1, #4
-	mov ip, r1
-	subs r1, #4
-	ldm r1!, {r0}
-	mov r4, r8
-	muls r4, r0, r4
-	adds r0, r4, #0
-	mov r1, sb
-	adds r4, r1, r0
-	adds r0, r2, r3
-	cmp r0, r4
-	bne _0815690C
-	mov r4, r8
-	adds r0, r3, r4
-	lsls r0, r0, #0x10
-	lsrs r3, r0, #0x10
-	b _08156944
-	.align 2, 0
-_08156904: .4byte gUnk_03002EC0
-_08156908: .4byte gUnk_030039A4
-_0815690C:
-	ldrb r1, [r5]
-	lsls r0, r1, #1
-	adds r0, r0, r1
-	lsls r0, r0, #2
-	add r0, sl
-	str r2, [r0]
-	ldrb r1, [r5]
-	lsls r0, r1, #1
-	adds r0, r0, r1
-	lsls r0, r0, #2
-	mov r1, sl
-	adds r1, #4
-	adds r0, r0, r1
-	str r6, [r0]
-	ldrb r1, [r5]
-	lsls r0, r1, #1
-	adds r0, r0, r1
-	lsls r0, r0, #2
-	add r0, sl
-	strh r3, [r0, #8]
-	ldrb r0, [r5]
-	adds r0, #1
-	movs r1, #0x3f
-	ands r0, r1
-	strb r0, [r5]
-	adds r6, r6, r3
-	mov r3, r8
-	adds r2, r4, #0
-_08156944:
-	adds r0, r7, #1
-	lsls r0, r0, #0x18
-	lsrs r7, r0, #0x18
-	ldr r0, [sp, #0x34]
-	cmp r7, r0
-	blo _081568E0
-_08156950:
-	ldr r4, _08156998 @ =gUnk_030039A4
-	ldrb r1, [r4]
-	lsls r0, r1, #1
-	adds r0, r0, r1
-	lsls r0, r0, #2
-	ldr r1, _0815699C @ =gUnk_03002EC0
-	adds r0, r0, r1
-	str r2, [r0]
-	ldrb r1, [r4]
-	lsls r0, r1, #1
-	adds r0, r0, r1
-	lsls r0, r0, #2
-	ldr r1, _0815699C @ =gUnk_03002EC0
-	adds r1, #4
-	adds r0, r0, r1
-	str r6, [r0]
-	ldrb r1, [r4]
-	lsls r0, r1, #1
-	adds r0, r0, r1
-	lsls r0, r0, #2
-	ldr r2, _0815699C @ =gUnk_03002EC0
-	adds r0, r0, r2
-	strh r3, [r0, #8]
-	ldrb r0, [r4]
-	adds r0, #1
-	movs r1, #0x3f
-	ands r0, r1
-	strb r0, [r4]
-_08156988:
-	add sp, #0x38
-	pop {r3, r4, r5}
-	mov r8, r3
-	mov sb, r4
-	mov sl, r5
-	pop {r4, r5, r6, r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08156998: .4byte gUnk_030039A4
-_0815699C: .4byte gUnk_03002EC0

src/sprite.c

@@ -8,10 +8,191 @@
 struct R10Struct {
     u16 unk0, unk2, unk4, unk6;
     s16 unk8, unkA;
+    u32 unkC;
 };
 
 extern const u8 gUnk_08D6084C[][2];
 
+void sub_081564D8(struct Sprite *sl) {
+    volatile OamData sp00;
+    OamData *p;
+    s32 sp08[1], sp0C[1];
+    s32 sp10[1], sp14[1];
+    u8 sp18, j;
+    const s16 *sp1C;
+    u16 sp20 = 0;
+    u32 sp24 = 0, sp28 = 0, sp2C = 0, sp30 = 0;
+    u32 sp34;
+    const struct R10Struct *sb;
+    s32 r5, r6;
+    s32 r7, ip;
+    u32 r0, r1;
+
+    if (sl->unk4 != -1) {
+        if (!(sl->unk4 >> 28))
+            sb = (const void *)gUnk_03003674[1][sl->unkC] + sl->unk4 * 12;
+        else
+            sb = (const void *)gUnk_03003674[1][sl->unkC] + sl->unk4 * 16;
+
+        sl->unk1E = sb->unk2;
+        sp08[0] = sl->unk10;
+        sp0C[0] = sl->unk12;
+        if (sl->unk8 & 0x20000) {
+            sp08[0] -= gUnk_030023F4.unk0;
+            sp0C[0] -= gUnk_030023F4.unk2;
+        }
+
+        sp10[0] = sb->unk4;
+        sp14[0] = sb->unk6;
+
+        if (sl->unk8 & 0x20) {
+            sp20 |= 0x100;
+            sp24 |= (sl->unk8 & 0x1F) << 9;
+            if (sl->unk8 & 0x40) {
+                sp08[0] -= sb->unk4 >> 1;
+                sp0C[0] -= sb->unk6 >> 1;
+                sp10[0] <<= 1;
+                sp14[0] <<= 1;
+                sp20 |= 0x200;
+            }
+        } else {
+            if (sl->unk8 & 0x800)
+                sp0C[0] -= sp14[0] - sb->unkA;
+            else
+                sp0C[0] -= sb->unkA;
+
+            if (sl->unk8 & 0x400)
+                sp08[0] -= sp10[0] - sb->unk8;
+            else
+                sp08[0] -= sb->unk8;
+
+            if (((sl->unk8 >> 11) & 1) != (sb->unk0 >> 15))
+                sp2C = 1;
+            r1 = sl->unk8;
+            r1 >>= 10;
+            r0 = sb->unk0 >> 14;
+            if ((r0 ^ r1) & 1)
+                sp30 = 1;
+        }
+
+        if (!sp10[0]
+            || (sp08[0] + sp10[0] >= 0 && sp08[0] <= 240 && sp0C[0] + sp14[0] >= 0 && sp0C[0] <= 160)) {
+            u32 r1 = (sp28 + (sl->unk1F << 12)) << 16;
+
+            sp20 |= (sl->unk8 & 0x180) * 8;
+            sp28 = (((sl->unk8 & 0x3000) << 14) | r1) >> 16;
+            sp1C = gUnk_03003674[2][sl->unkC];
+            sl->unk1D = gUnk_030024F0;
+            for (sp18 = 0; sp18 < sb->unk2; ++sp18) {
+                u32 r0;
+
+                DmaCopy16(3, &sp1C[3 * ((sb->unk0 & 0x3FFF) + sp18)], &sp00, 6); // excluding affine params
+                p = (OamData *)&sp00;
+                r6 = p->all.attr1 & 0x1FF;
+                if (r6 >= 0x100)
+                    r6 -= 0x200;
+                r5 = p->all.attr0 & 0xFF;
+                if (r5 >= 0x80)
+                    r5 -= 0x100;
+                p->all.attr1 &= 0xFE00;
+                p->all.attr0 &= 0xFE00;
+                r0 = ((p->all.attr0 & 0xC000) >> 12) | ((p->all.attr1 & 0xC000) >> 14);
+                r7 = gUnk_08D6084C[r0][1];
+                ip = gUnk_08D6084C[r0][0];
+#ifndef NONMATCHING
+            {
+                /* The issue here might be caused by wrongly marking sp00 as volatile;
+                 * it's possible that we need to permutate ways of dereference of sp00
+                 * at different locations (sp00.xx vs p->xx). 
+                 * p is very likely to be a real variable as the function itself is a
+                 * modified (and manually optimized) version of sub_081569A0. 
+                 */
+                register u32 _sp2C asm("r0") = sp2C;
+                register u32 _sp30 asm("r1") = sp30;
+
+                _sp2C = sp2C;
+                _sp30 = sp30;
+                asm("":::"r2");
+                if (_sp2C | _sp30) {
+#else
+                if (sp2C | sp30) {
+#endif
+                    if (sp2C) {
+                        p->all.attr1 ^= 0x2000;
+                        r5 = sp14[0] - r7 - r5;
+                    }
+                    
+                    if (sp30) {
+                        p->all.attr1 ^= 0x1000;
+                        r6 = sp10[0] - ip - r6;
+                    }
+                }
+#ifndef NONMATCHING
+            }
+#endif
+                if ((sp0C[0] + r5 + r7 >= 0 && sp0C[0] + r5 <= 160)
+                    && (sp08[0] + r6 + ip >= 0 && sp08[0] + r6 <= 240)) {
+                    OamData *r1_;
+
+                    p->all.attr0 += ((sp0C[0] + r5) & 0xFF);
+                    p->all.attr1 += ((sp08[0] + r6) & 0x1FF);
+                    p->all.attr0 |= sp20;
+                    p->all.attr1 |= sp24;
+                    p->all.attr2 |= sp28;
+                    if (p->all.attr0 & 0x2000)
+                        p->all.attr2 += p->all.attr2 & 0x3FF;
+                    p->all.attr2 += (sl->unk0 - 0x6010000u) >> 5;
+                    r1_ = sub_08156D84((sl->unk14 & 0x7C0) >> 6);
+                    if (gUnk_03006CC4 == r1_) return;
+                    DmaCopy16(3, &sp00, r1_, 6);
+                }
+            }
+
+            if ((sl->unk4 >> 28) == 1 && sl->unk8 & 0x4000000) {
+                const s32 *ip;
+                u16 r8, r3;
+                const u8 *r2_, *r2, *r4;
+                s32 r6;
+                u32 r1;
+                
+                sl->unk8 &= 0xFBFFFFFF;
+                r1 = sb->unkC & 0xFFFFFF;
+                sp34 = sb->unkC >> 24;                
+                ip = (const void *)(gUnk_03003674[6] + r1);
+                if (ip[0] >= 0) {
+                    r8 = 0x20;
+                    r2_ = (const void *)gUnk_03003674[4];
+                } else {
+                    r8 = 0x40;
+                    r2_ = (const void *)gUnk_03003674[5];
+                }
+
+                r3 = r8;
+                r2 = r2_ + ip++[0] * r8;
+                r6 = sl->unk0;
+                for (j = 1; j < sp34; ++j) {
+                    r4 = r2_ + ip++[0] * r8;
+                    if (r2 + r3 == r4)
+                        r3 += r8;
+                    else {
+                        gUnk_03002EC0[gUnk_030039A4].unk0 = (u32)r2;
+                        gUnk_03002EC0[gUnk_030039A4].unk4 = r6;
+                        gUnk_03002EC0[gUnk_030039A4].unk8 = r3;
+                        gUnk_030039A4 = (gUnk_030039A4 + 1) & 0x3F;
+                        r6 += r3;
+                        r3 = r8;
+                        r2 = r4;
+                    }
+                }
+                gUnk_03002EC0[gUnk_030039A4].unk0 = (u32)r2;
+                gUnk_03002EC0[gUnk_030039A4].unk4 = r6;
+                gUnk_03002EC0[gUnk_030039A4].unk8 = r3;
+                gUnk_030039A4 = (gUnk_030039A4 + 1) & 0x3F;
+            }
+        }
+    }
+}
+
 /* unused function */
 void sub_081569A0(struct Sprite *sb, u16 *sp08, u8 sp0C) {
     vs32 sp00[1], sp04[1];