split unrelated code

asm/code_080300AC.s

@@ -0,0 +1,101 @@
+	.include "asm/macros.inc"
+
+	.include "constants/constants.inc"
+
+	.syntax unified
+
+	.text
+
+	thumb_func_start sub_080300E8
+sub_080300E8: @ 0x080300E8
+	push {lr}
+	ldr r1, _08030110 @ =gScreenTransition
+	adds r3, r1, #0
+	adds r3, #0xae
+	ldrh r0, [r3]
+	cmp r0, #0xff
+	beq _0803010C
+	lsls r0, r0, #2
+	adds r1, #0x6c
+	adds r0, r0, r1
+	ldr r2, _08030114 @ =gPlayerEntity
+	ldrh r1, [r0]
+	strh r1, [r2, #0x2e]
+	ldrh r0, [r0, #2]
+	adds r0, #0xc
+	strh r0, [r2, #0x32]
+	movs r0, #0xff
+	strh r0, [r3]
+_0803010C:
+	pop {pc}
+	.align 2, 0
+_08030110: .4byte gScreenTransition
+_08030114: .4byte gPlayerEntity
+
+	thumb_func_start sub_08030118
+sub_08030118: @ 0x08030118
+	push {lr}
+	adds r2, r0, #0
+	ldr r0, _0803013C @ =gScreenTransition
+	adds r0, #0xac
+	ldrh r0, [r0]
+	asrs r0, r2
+	movs r1, #1
+	ands r0, r1
+	cmp r0, #0
+	beq _08030140
+	movs r0, #0xc0
+	lsls r0, r0, #2
+	adds r1, r2, #0
+	adds r1, #0x67
+	bl SetLocalFlagByOffset
+	b _0803014C
+	.align 2, 0
+_0803013C: .4byte gScreenTransition
+_08030140:
+	movs r0, #0xc0
+	lsls r0, r0, #2
+	adds r1, r2, #0
+	adds r1, #0x67
+	bl ClearLocalFlagByOffset
+_0803014C:
+	pop {pc}
+	.align 2, 0
+
+	thumb_func_start sub_08030150
+sub_08030150: @ 0x08030150
+	push {r4, r5, lr}
+	mov ip, r0
+	ldr r2, _08030194 @ =gScreenTransition
+	adds r5, r2, #0
+	adds r5, #0xac
+	mov r3, ip
+	adds r3, #0x80
+	ldrb r4, [r3]
+	movs r0, #1
+	lsls r0, r4
+	ldrh r1, [r5]
+	bics r1, r0
+	mov r0, ip
+	adds r0, #0x84
+	ldr r0, [r0]
+	lsls r0, r4
+	orrs r1, r0
+	strh r1, [r5]
+	ldrb r0, [r3]
+	lsls r0, r0, #2
+	adds r2, #0x6c
+	adds r0, r0, r2
+	mov r4, ip
+	ldrh r1, [r4, #0x2e]
+	strh r1, [r0]
+	ldrb r0, [r3]
+	lsls r0, r0, #1
+	adds r0, #1
+	lsls r0, r0, #1
+	adds r0, r0, r2
+	ldrh r1, [r4, #0x32]
+	strh r1, [r0]
+	pop {r4, r5, pc}
+	.align 2, 0
+_08030194: .4byte gScreenTransition

asm/wizzrobeIce.s

@@ -375,133 +375,4 @@ _080300A2:
 	adds r0, r4, #0
 	bl sub_0802F9C8
 	pop {r4, pc}
-	.align 2, 0
+	.align 2, 0
-
-	thumb_func_start sub_080300AC
-sub_080300AC: @ 0x080300AC
-	push {r4, lr}
-	ldr r4, _080300C0 @ =gUnk_0300110C
-	adds r0, r4, #0
-	movs r1, #0x44
-	bl _DmaZero
-	adds r4, #0x42
-	movs r0, #0xff
-	strh r0, [r4]
-	pop {r4, pc}
-	.align 2, 0
-_080300C0: .4byte gUnk_0300110C
-
-	thumb_func_start sub_080300C4
-sub_080300C4: @ 0x080300C4
-	push {lr}
-	ldr r2, _080300E4 @ =gScreenTransition
-	adds r0, r2, #0
-	adds r0, #0xae
-	ldrh r0, [r0]
-	cmp r0, #0xff
-	bne _080300E2
-	adds r0, r2, #0
-	adds r0, #0xac
-	movs r1, #0
-	strh r1, [r0]
-	subs r0, #0x40
-	movs r1, #0x40
-	bl _DmaZero
-_080300E2:
-	pop {pc}
-	.align 2, 0
-_080300E4: .4byte gScreenTransition
-
-	thumb_func_start sub_080300E8
-sub_080300E8: @ 0x080300E8
-	push {lr}
-	ldr r1, _08030110 @ =gScreenTransition
-	adds r3, r1, #0
-	adds r3, #0xae
-	ldrh r0, [r3]
-	cmp r0, #0xff
-	beq _0803010C
-	lsls r0, r0, #2
-	adds r1, #0x6c
-	adds r0, r0, r1
-	ldr r2, _08030114 @ =gPlayerEntity
-	ldrh r1, [r0]
-	strh r1, [r2, #0x2e]
-	ldrh r0, [r0, #2]
-	adds r0, #0xc
-	strh r0, [r2, #0x32]
-	movs r0, #0xff
-	strh r0, [r3]
-_0803010C:
-	pop {pc}
-	.align 2, 0
-_08030110: .4byte gScreenTransition
-_08030114: .4byte gPlayerEntity
-
-	thumb_func_start sub_08030118
-sub_08030118: @ 0x08030118
-	push {lr}
-	adds r2, r0, #0
-	ldr r0, _0803013C @ =gScreenTransition
-	adds r0, #0xac
-	ldrh r0, [r0]
-	asrs r0, r2
-	movs r1, #1
-	ands r0, r1
-	cmp r0, #0
-	beq _08030140
-	movs r0, #0xc0
-	lsls r0, r0, #2
-	adds r1, r2, #0
-	adds r1, #0x67
-	bl SetLocalFlagByOffset
-	b _0803014C
-	.align 2, 0
-_0803013C: .4byte gScreenTransition
-_08030140:
-	movs r0, #0xc0
-	lsls r0, r0, #2
-	adds r1, r2, #0
-	adds r1, #0x67
-	bl ClearLocalFlagByOffset
-_0803014C:
-	pop {pc}
-	.align 2, 0
-
-	thumb_func_start sub_08030150
-sub_08030150: @ 0x08030150
-	push {r4, r5, lr}
-	mov ip, r0
-	ldr r2, _08030194 @ =gScreenTransition
-	adds r5, r2, #0
-	adds r5, #0xac
-	mov r3, ip
-	adds r3, #0x80
-	ldrb r4, [r3]
-	movs r0, #1
-	lsls r0, r4
-	ldrh r1, [r5]
-	bics r1, r0
-	mov r0, ip
-	adds r0, #0x84
-	ldr r0, [r0]
-	lsls r0, r4
-	orrs r1, r0
-	strh r1, [r5]
-	ldrb r0, [r3]
-	lsls r0, r0, #2
-	adds r2, #0x6c
-	adds r0, r0, r2
-	mov r4, ip
-	ldrh r1, [r4, #0x2e]
-	strh r1, [r0]
-	ldrb r0, [r3]
-	lsls r0, r0, #1
-	adds r0, #1
-	lsls r0, r0, #1
-	adds r0, r0, r2
-	ldrh r1, [r4, #0x32]
-	strh r1, [r0]
-	pop {r4, r5, pc}
-	.align 2, 0
-_08030194: .4byte gScreenTransition

include/structures.h

@@ -83,6 +83,7 @@ typedef struct {
     u16 field_0x4a;
     u8 field_0x4c[0x60];
     u16 field_0xac;
+    u16 field_0xae;
 } ScreenTransition;
 
 extern ScreenTransition gScreenTransition;

linker.ld

@@ -370,6 +370,8 @@ SECTIONS {
 		asm/wizzrobeWind.o(.text);
 		asm/wizzrobeFire.o(.text);
 		asm/wizzrobeIce.o(.text);
+		src/code_080300AC.o(.text); /* ??? */
+		asm/code_080300AC.o(.text); /* ??? */
 		asm/armos.o(.text);
 		asm/eyegore.o(.text);
 		asm/rope.o(.text);

src/code_080300AC.c

@@ -0,0 +1,25 @@
+#include "global.h"
+#include "entity.h"
+#include "functions.h"
+
+//extern void DmaZero(void*, u32);
+
+typedef struct {
+    u16 unk0;
+    u16 filler2[32];
+    u16 unk66;
+} struct_0300110C;
+
+extern struct_0300110C gUnk_0300110C;
+
+void sub_080300AC(void) {
+  _DmaZero(&gUnk_0300110C.unk0, 0x44);
+  gUnk_0300110C.unk66 = 0xff;
+}
+
+void sub_080300C4(void) {
+  if (gScreenTransition.field_0xae == 0xff) {
+    gScreenTransition.field_0xac = 0;
+    _DmaZero(&gScreenTransition.field_0x4c[32], 0x40);
+  }
+}