Merge pull request #391 from DizzyEggg/frontier

Clean up bss/common/ewram symbols and decompile mossdeep

1 files changed, 297 insertions, 506 deletions

diff --git a/src/fossil_specials.c b/src/fossil_specials.c
index 49db0f5b6..8164a3a78 100644
--- a/src/fossil_specials.c
+++ b/src/fossil_specials.c
@@ -17,29 +17,32 @@
 #include "task.h"
 #include "window.h"
 
-#define MIRAGE_TOWER_GFX_LENGTH (sizeof(gUnknown_08617274) + sizeof(gMirageTower_Gfx))
+#define MIRAGE_TOWER_GFX_LENGTH (32 + sizeof(gMirageTower_Gfx))
 #define MIRAGE_TOWER_PALETTE_LENGTH 0x800
 #define ROOT_FOSSIL_GFX_LENGTH sizeof(gRootFossil_Gfx)
 #define ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH 0x100
 
-//struct
-struct Struct8617DA4 {
+struct Struct8617DA4
+{
     u8 x;
     u8 y;
     u16 tileId;
 };
 
-struct Struct203CF10 {
+struct Struct203CF10
+{
     u8 *buffer;
-    u8 curr_buffer_index;
+    u8 currIndex;
 };
 
-struct DynamicSpriteFrameImage{
+struct DynamicSpriteFrameImage
+{
     u8 *data;
     u16 size;
 };
 
-struct Struct203CF0C {
+struct Struct203CF0C
+{
     u8 *frameImageTiles;
     struct DynamicSpriteFrameImage *frameImage;
     u8 spriteId;
@@ -52,10 +55,10 @@ static void sub_81BED50(u8 taskId);
 static void sub_81BEBF4(u8 taskId);
 static void sub_81BF028(u8 taskId);
 static void sub_81BF248(struct Sprite *);
-/*static*/ void sub_81BF2B8(u8* a, u16 b, u8 c, u8 d, u8 e);
+static void sub_81BF2B8(u8* a, u16 b, u8 c, u8 d, u8 e);
 
 // .rodata
-static const u8 gUnknown_08617274[] = {00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00};
+static const u8 gUnknown_08617274[32] = {0};
 static const u8 gMirageTower_Gfx[] = INCBIN_U8("graphics/misc/mirage_tower.4bpp");
 static const u16 gUnknown_08617B94[] = INCBIN_U16("graphics/misc/mirage_tower.bin");
 static const u16 gRootFossil_Pal[] = INCBIN_U16("graphics/misc/fossil.gbapal");
@@ -64,16 +67,16 @@ static const u8 gMirageTowerCrumbles_Gfx[] = INCBIN_U8("graphics/misc/mirage_tow
 static const u16 gMirageTowerCrumbles_Palette[] = INCBIN_U16("graphics/misc/mirage_tower_crumbles.gbapal");
 
 const s16 gUnknown_08617D64[][3] =
-    {
-        {  0,  10,  65},
-        { 17,   3,  50},
-        {-12,   0,  75},
-        { 10,  15,  90},
-        {  7,   8,  65},
-        {-18,   5,  75},
-        { 22, -10,  55},
-        {-24,  -4,  65},
-    };
+{
+    {  0,  10,  65},
+    { 17,   3,  50},
+    {-12,   0,  75},
+    { 10,  15,  90},
+    {  7,   8,  65},
+    {-18,   5,  75},
+    { 22, -10,  55},
+    {-24,  -4,  65},
+};
 
 const struct SpriteSheet gUnknown_08617D94[] =
 {
@@ -82,26 +85,26 @@ const struct SpriteSheet gUnknown_08617D94[] =
 };
 
 static const struct Struct8617DA4 gUnknown_08617DA4[] =
-    {
-        {0x12, 0x35, 0x251},
-        {0x13, 0x35, 0x251},
-        {0x14, 0x35, 0x251},
-        {0x12, 0x36, 0x251},
-        {0x13, 0x36, 0x251},
-        {0x14, 0x36, 0x251},
-        {0x12, 0x37, 0x251},
-        {0x13, 0x37, 0x251},
-        {0x14, 0x37, 0x251},
-        {0x12, 0x38, 0x251},
-        {0x13, 0x38, 0x251},
-        {0x14, 0x38, 0x251},
-        {0x12, 0x39, 0x259},
-        {0x13, 0x39, 0x259},
-        {0x14, 0x39, 0x259},
-        {0x12, 0x3A, 0x121},
-        {0x13, 0x3A, 0x121},
-        {0x14, 0x3A, 0x121},
-    };
+{
+    {0x12, 0x35, 0x251},
+    {0x13, 0x35, 0x251},
+    {0x14, 0x35, 0x251},
+    {0x12, 0x36, 0x251},
+    {0x13, 0x36, 0x251},
+    {0x14, 0x36, 0x251},
+    {0x12, 0x37, 0x251},
+    {0x13, 0x37, 0x251},
+    {0x14, 0x37, 0x251},
+    {0x12, 0x38, 0x251},
+    {0x13, 0x38, 0x251},
+    {0x14, 0x38, 0x251},
+    {0x12, 0x39, 0x259},
+    {0x13, 0x39, 0x259},
+    {0x14, 0x39, 0x259},
+    {0x12, 0x3A, 0x121},
+    {0x13, 0x3A, 0x121},
+    {0x14, 0x3A, 0x121},
+};
 
 static const union AnimCmd gSpriteAnim_8617DEC[] =
 {
@@ -131,67 +134,70 @@ static const union AnimCmd *const gSpriteAnimTable_8617DFC[] =
     gSpriteAnim_8617DEC,
 };
 
-static const struct SpriteTemplate gUnknown_08617E00 = {
+static const struct SpriteTemplate gUnknown_08617E00 =
+{
     0xFFFF, 0xFFFF, &gOamData_8617DF4, gSpriteAnimTable_8617DFC, NULL, gDummySpriteAffineAnimTable, SpriteCallbackDummy
 };
 
-// ewram
-EWRAM_DATA u8* gUnknown_0203CF04 = NULL;
-EWRAM_DATA u8* gUnknown_0203CF08 = NULL;
-EWRAM_DATA struct Struct203CF0C *gUnknown_0203CF0C = NULL;
-EWRAM_DATA struct Struct203CF10 *gUnknown_0203CF10 = NULL;
-EWRAM_DATA u16 *gUnknown_0203CF14 = NULL;
+// EWRAM
+EWRAM_DATA static u8* sUnknown_0203CF04 = NULL;
+EWRAM_DATA static u8* sUnknown_0203CF08 = NULL;
+EWRAM_DATA static struct Struct203CF0C *sUnknown_0203CF0C = NULL;
+EWRAM_DATA static struct Struct203CF10 *sUnknown_0203CF10 = NULL;
+EWRAM_DATA static u16 *sUnknown_0203CF14 = NULL;
 
-// iwram
-IWRAM_DATA u16 gUnknown_030012A8[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+// IWRAM bss
+IWRAM_DATA static u16 gUnknown_030012A8[8];
 
 // text
 void sub_81BEB24(void)
 {
     u8 i;
-    for(i = 0; i < (sizeof(gUnknown_08617DA4)/sizeof(gUnknown_08617DA4[0])); i++)
+    for (i = 0; i < (sizeof(gUnknown_08617DA4)/sizeof(gUnknown_08617DA4[0])); i++)
         MapGridSetMetatileIdAt(gUnknown_08617DA4[i].x + 7, gUnknown_08617DA4[i].y + 7, gUnknown_08617DA4[i].tileId);
     DrawWholeMapView();
 }
 
 void sub_81BEB54(void)
 {
-    CreateTask(sub_81BED50, 0x9);
+    CreateTask(sub_81BED50, 9);
 }
 
 void sub_81BEB68(void)
 {
-    CreateTask(sub_81BEBF4, 0x9);
+    CreateTask(sub_81BEBF4, 9);
 }
 
 void sub_81BEB7C(void)
 {
-    CreateTask(sub_81BF028, 0x9);
+    CreateTask(sub_81BF028, 9);
 }
 
 void sub_81BEB90(void)
 {
-    SetGpuReg(REG_OFFSET_BG0HOFS, gUnknown_0203CF14[0]);
-    SetGpuReg(REG_OFFSET_BG0VOFS, gUnknown_0203CF14[1]);
+    SetGpuReg(REG_OFFSET_BG0HOFS, sUnknown_0203CF14[0]);
+    SetGpuReg(REG_OFFSET_BG0VOFS, sUnknown_0203CF14[1]);
 }
 
 void sub_81BEBB4(u8 taskId)
 {
-    if(!(gTasks[taskId].data[0]))
+    if (!(gTasks[taskId].data[0]))
     {
-        gUnknown_0203CF14[0] = -gUnknown_0203CF14[0];
+        sUnknown_0203CF14[0] = -sUnknown_0203CF14[0];
         gTasks[taskId].data[0] = 2;
         sub_81BEB90();
     }
     else
+    {
         gTasks[taskId].data[0]--;
+    }
 }
 
 static void sub_81BEBF4(u8 taskId)
 {
     u8 zero;
 
-    switch(gTasks[taskId].data[0])
+    switch (gTasks[taskId].data[0])
     {
     case 0:
         FreeAllWindowBuffers();
@@ -199,19 +205,19 @@ static void sub_81BEBF4(u8 taskId)
         gTasks[taskId].data[0]++;
         break;
     case 1:
-        gUnknown_0203CF04 = (u8 *)AllocZeroed(MIRAGE_TOWER_GFX_LENGTH);
-        gUnknown_0203CF08 = (u8 *)AllocZeroed(MIRAGE_TOWER_PALETTE_LENGTH);
+        sUnknown_0203CF04 = (u8 *)AllocZeroed(MIRAGE_TOWER_GFX_LENGTH);
+        sUnknown_0203CF08 = (u8 *)AllocZeroed(MIRAGE_TOWER_PALETTE_LENGTH);
         ChangeBgX(0, 0, 0);
         ChangeBgY(0, 0, 0);
         gTasks[taskId].data[0]++;
         break;
     case 2:
-        CpuSet(gUnknown_08617274, gUnknown_0203CF04, MIRAGE_TOWER_GFX_LENGTH / 2);
-        LoadBgTiles(0, gUnknown_0203CF04, MIRAGE_TOWER_GFX_LENGTH, 0);
+        CpuSet(gUnknown_08617274, sUnknown_0203CF04, MIRAGE_TOWER_GFX_LENGTH / 2);
+        LoadBgTiles(0, sUnknown_0203CF04, MIRAGE_TOWER_GFX_LENGTH, 0);
         gTasks[taskId].data[0]++;
         break;
     case 3:
-        SetBgTilemapBuffer(0, gUnknown_0203CF08);
+        SetBgTilemapBuffer(0, sUnknown_0203CF08);
         CopyToBgTilemapBufferRect_ChangePalette(0, &gUnknown_08617B94, 12, 29, 6, 12, 17);
         CopyBgTilemapBufferToVram(0);
         gTasks[taskId].data[0]++;
@@ -225,10 +231,10 @@ static void sub_81BEBF4(u8 taskId)
         gTasks[taskId].data[0]++;
         break;
     case 6:
-        gUnknown_0203CF14 = (u16 *)Alloc(4);
+        sUnknown_0203CF14 = Alloc(4);
         zero = 0;
-        gUnknown_0203CF14[0] = 2;
-        gUnknown_0203CF14[1] = zero;
+        sUnknown_0203CF14[0] = 2;
+        sUnknown_0203CF14[1] = zero;
         CreateTask(sub_81BEBB4, 0xA);
         DestroyTask(taskId);
         EnableBothScriptContexts();
@@ -236,86 +242,76 @@ static void sub_81BEBF4(u8 taskId)
     }
 }
 
-#ifdef NONMATCHING
 #define OUTER_BUFFER_LENGTH 0x60
 #define INNER_BUFFER_LENGTH 0x30
 static void sub_81BED50(u8 taskId)
 {
     u8 anotherTaskId, j;
+    u16 i;
+    u8 index;
 
-
-    switch(gTasks[taskId].data[0])
+    switch (gTasks[taskId].data[0])
     {
     case 1:
-        gUnknown_0203CF10 = (struct Struct203CF10 *)AllocZeroed(OUTER_BUFFER_LENGTH * sizeof(struct Struct203CF10));
+        sUnknown_0203CF10 = AllocZeroed(OUTER_BUFFER_LENGTH * sizeof(struct Struct203CF10));
         break;
     case 3:
+        if (gTasks[taskId].data[3] <= (OUTER_BUFFER_LENGTH - 1))
         {
-            u16 i;
-            u16 left;
-            u32 index, next;
-
-            index = (u16)gTasks[taskId].data[3];
-            if(gTasks[taskId].data[3] <= (OUTER_BUFFER_LENGTH - 1))
+            if (gTasks[taskId].data[1] > 1)
             {
-                if(gTasks[taskId].data[1] > 1)
+                index = gTasks[taskId].data[3];
+                sUnknown_0203CF10[index].buffer = Alloc(INNER_BUFFER_LENGTH);
+                for (i = 0; i <= (INNER_BUFFER_LENGTH - 1); i++)
+                    sUnknown_0203CF10[index].buffer[i] = i;
+                for (i = 0; i <= (INNER_BUFFER_LENGTH - 1); i++)
                 {
-                    index = (u8)index;
-                    gUnknown_0203CF10[index].buffer = (u8 *)Alloc(INNER_BUFFER_LENGTH);
-                    for(i = 0; i <= (INNER_BUFFER_LENGTH - 1); i++)
-                        gUnknown_0203CF10[index].buffer[i] = i;
-                    for(i = 0; i <= (INNER_BUFFER_LENGTH - 1); i++)
-                    {
-                        u16 rand1, rand2, temp;
-
-                        rand1 = Random() % 0x30;
-                        rand2 = Random() % 0x30;
-                        temp = gUnknown_0203CF10[index].buffer[rand2];
-                        gUnknown_0203CF10[index].buffer[rand2] = gUnknown_0203CF10[index].buffer[rand1];
-                        gUnknown_0203CF10[index].buffer[rand1] = temp;
-                    }
-                    if(gTasks[taskId].data[3] <= (OUTER_BUFFER_LENGTH - 1))
-                        gTasks[taskId].data[3]++;
-                    gTasks[taskId].data[1] = 0;
+                    u16 rand1, rand2, temp;
+
+                    rand1 = Random() % 0x30;
+                    rand2 = Random() % 0x30;
+                    SWAP(sUnknown_0203CF10[index].buffer[rand2], sUnknown_0203CF10[index].buffer[rand1], temp);
                 }
-                gTasks[taskId].data[1]++;
+                if (gTasks[taskId].data[3] <= (OUTER_BUFFER_LENGTH - 1))
+                    gTasks[taskId].data[3]++;
+                gTasks[taskId].data[1] = 0;
             }
-            index = (u8)gTasks[taskId].data[3];
-            for(left = (u8)gTasks[taskId].data[2]; left < (u16)index; left = next)
+            gTasks[taskId].data[1]++;
+        }
+        index = gTasks[taskId].data[3];
+        for (i = (u8)(gTasks[taskId].data[2]); i < index; i++)
+        {
+            for (j = 0; j < 1; j++)
             {
-                j = 0;
-                next = left + 1;
-                while(!j)
-                {
-                    sub_81BF2B8(gUnknown_0203CF04, ((((OUTER_BUFFER_LENGTH - 1) - left) * INNER_BUFFER_LENGTH) + gUnknown_0203CF10[left].buffer[(gUnknown_0203CF10[left].curr_buffer_index)++]), 0, INNER_BUFFER_LENGTH, 1);
-                    j++;
-                }
-                if(gUnknown_0203CF10[left].curr_buffer_index > (INNER_BUFFER_LENGTH - 1))
-                {
-                    FREE_AND_SET_NULL(gUnknown_0203CF10[left].buffer);
-                    gTasks[taskId].data[2]++;
-                    if((left % 2) ==  1)
-                        gUnknown_0203CF14[1]--;
-                }
+                sub_81BF2B8(sUnknown_0203CF04,
+                            ((((OUTER_BUFFER_LENGTH - 1) - i) * INNER_BUFFER_LENGTH) + sUnknown_0203CF10[i].buffer[(sUnknown_0203CF10[i].currIndex)++]),
+                            0, INNER_BUFFER_LENGTH, 1);
+            }
+            if (sUnknown_0203CF10[i].currIndex > (INNER_BUFFER_LENGTH - 1))
+            {
+                FREE_AND_SET_NULL(sUnknown_0203CF10[i].buffer);
+                gTasks[taskId].data[2]++;
+                if ((i % 2) == 1)
+                    sUnknown_0203CF14[1]--;
             }
-            LoadBgTiles(0, gUnknown_0203CF04, MIRAGE_TOWER_GFX_LENGTH, 0);
-            if(gUnknown_0203CF10[OUTER_BUFFER_LENGTH - 1].curr_buffer_index > (INNER_BUFFER_LENGTH - 1))
-                break;
-            return;
         }
+        LoadBgTiles(0, sUnknown_0203CF04, MIRAGE_TOWER_GFX_LENGTH, 0);
+        if (sUnknown_0203CF10[OUTER_BUFFER_LENGTH - 1].currIndex > (INNER_BUFFER_LENGTH - 1))
+            break;
+        return;
     case 4:
         UnsetBgTilemapBuffer(0);
         anotherTaskId = FindTaskIdByFunc(sub_81BEBB4);
-        if(anotherTaskId != 0xFF)
+        if (anotherTaskId != 0xFF)
             DestroyTask(anotherTaskId);
-        gUnknown_0203CF14[1] = gUnknown_0203CF14[0] = 0;
+        sUnknown_0203CF14[1] = sUnknown_0203CF14[0] = 0;
         sub_81BEB90();
         break;
     case 5:
-        FREE_AND_SET_NULL(gUnknown_0203CF14);
-        FREE_AND_SET_NULL(gUnknown_0203CF10);
-        FREE_AND_SET_NULL(gUnknown_0203CF04);
-        FREE_AND_SET_NULL(gUnknown_0203CF08);
+        FREE_AND_SET_NULL(sUnknown_0203CF14);
+        FREE_AND_SET_NULL(sUnknown_0203CF10);
+        FREE_AND_SET_NULL(sUnknown_0203CF04);
+        FREE_AND_SET_NULL(sUnknown_0203CF08);
         break;
     case 6:
         SetGpuRegBits(REG_OFFSET_BG2CNT, 0x2);
@@ -334,423 +330,75 @@ static void sub_81BED50(u8 taskId)
     gTasks[taskId].data[0]++;
 }
 
-#else
-NAKED
-static void sub_81BED50(u8 taskId)
-{
-    asm("\n\
-        .syntax unified\n\
-        push {r4-r7,lr}\n\
-        mov r7, r10\n\
-        mov r6, r9\n\
-        mov r5, r8\n\
-        push {r5-r7}\n\
-        sub sp, 0x10\n\
-        lsls r0, 24\n\
-        lsrs r0, 24\n\
-        mov r10, r0\n\
-        ldr r1, =gTasks\n\
-        lsls r0, 2\n\
-        add r0, r10\n\
-        lsls r0, 3\n\
-        adds r0, r1\n\
-        ldrh r0, [r0, 0x8]\n\
-        subs r0, 0x1\n\
-        lsls r0, 16\n\
-        asrs r0, 16\n\
-        adds r6, r1, 0\n\
-        cmp r0, 0x7\n\
-        bls _081BED7C\n\
-        b _081BF002\n\
-    _081BED7C:\n\
-        lsls r0, 2\n\
-        ldr r1, =_081BED90\n\
-        adds r0, r1\n\
-        ldr r0, [r0]\n\
-        mov pc, r0\n\
-        .pool\n\
-        .align 2, 0\n\
-    _081BED90:\n\
-        .4byte _081BEDB0\n\
-        .4byte _081BF002\n\
-        .4byte _081BEDC4\n\
-        .4byte _081BEF64\n\
-        .4byte _081BEF94\n\
-        .4byte _081BEFD0\n\
-        .4byte _081BEFF0\n\
-        .4byte _081BEFF8\n\
-    _081BEDB0:\n\
-        ldr r4, =gUnknown_0203CF10\n\
-        movs r0, 0xC0\n\
-        lsls r0, 2\n\
-        bl AllocZeroed\n\
-        str r0, [r4]\n\
-        b _081BF002\n\
-        .pool\n\
-    _081BEDC4:\n\
-        mov r1, r10\n\
-        lsls r0, r1, 2\n\
-        adds r1, r0, r1\n\
-        lsls r1, 3\n\
-        adds r2, r1, r6\n\
-        ldrh r3, [r2, 0xE]\n\
-        movs r4, 0xE\n\
-        ldrsh r1, [r2, r4]\n\
-        str r0, [sp, 0x8]\n\
-        cmp r1, 0x5F\n\
-        bgt _081BEE8A\n\
-        movs r1, 0xA\n\
-        ldrsh r0, [r2, r1]\n\
-        cmp r0, 0x1\n\
-        ble _081BEE7C\n\
-        lsls r0, r3, 24\n\
-        lsrs r4, r0, 24\n\
-        movs r0, 0x30\n\
-        bl Alloc\n\
-        ldr r3, =gUnknown_0203CF10\n\
-        ldr r1, [r3]\n\
-        lsls r2, r4, 3\n\
-        adds r1, r2, r1\n\
-        str r0, [r1]\n\
-        movs r5, 0\n\
-        adds r4, r2, 0\n\
-    _081BEDFA:\n\
-        ldr r0, [r3]\n\
-        adds r0, r4, r0\n\
-        ldr r0, [r0]\n\
-        adds r0, r5\n\
-        strb r5, [r0]\n\
-        adds r0, r5, 0x1\n\
-        lsls r0, 16\n\
-        lsrs r5, r0, 16\n\
-        cmp r5, 0x2F\n\
-        bls _081BEDFA\n\
-        movs r5, 0\n\
-        ldr r7, =gUnknown_0203CF10\n\
-        adds r6, r2, 0\n\
-    _081BEE14:\n\
-        bl Random\n\
-        lsls r0, 16\n\
-        lsrs r0, 16\n\
-        movs r1, 0x30\n\
-        bl __umodsi3\n\
-        adds r4, r0, 0\n\
-        lsls r4, 16\n\
-        lsrs r4, 16\n\
-        bl Random\n\
-        lsls r0, 16\n\
-        lsrs r0, 16\n\
-        movs r1, 0x30\n\
-        bl __umodsi3\n\
-        lsls r0, 16\n\
-        lsrs r0, 16\n\
-        ldr r1, [r7]\n\
-        adds r1, r6, r1\n\
-        ldr r1, [r1]\n\
-        adds r0, r1, r0\n\
-        ldrb r2, [r0]\n\
-        adds r1, r4 \n\
-        ldrb r1, [r1]\n\
-        strb r1, [r0]\n\
-        ldr r0, [r7]\n\
-        adds r0, r6, r0\n\
-        ldr r0, [r0]\n\
-        adds r0, r4\n\
-        strb r2, [r0]\n\
-        adds r0, r5, 0x1\n\
-        lsls r0, 16\n\
-        lsrs r5, r0, 16\n\
-        cmp r5, 0x2F\n\
-        bls _081BEE14\n\
-        ldr r0, =gTasks\n\
-        ldr r1, [sp, 0x8]\n\
-        add r1, r10\n\
-        lsls r1, 3\n\
-        adds r2, r1, r0\n\
-        ldrh r3, [r2, 0xE]\n\
-        movs r4, 0xE\n\
-        ldrsh r1, [r2, r4]\n\
-        adds r6, r0, 0\n\
-        cmp r1, 0x5F\n\
-        bgt _081BEE78\n\
-        adds r0, r3, 0x1\n\
-        strh r0, [r2, 0xE]\n\
-    _081BEE78:\n\
-        movs r0, 0\n\
-        strh r0, [r2, 0xA]\n\
-    _081BEE7C:\n\
-        ldr r1, [sp, 0x8]\n\
-        add r1, r10\n\
-        lsls r1, 3\n\
-        adds r1, r6\n\
-        ldrh r0, [r1, 0xA]\n\
-        adds r0, 0x1\n\
-        strh r0, [r1, 0xA]\n\
-    _081BEE8A:\n\
-        ldr r0, [sp, 0x8]\n\
-        add r0, r10\n\
-        lsls r0, 3\n\
-        adds r0, r6\n\
-        ldrb r4, [r0, 0xE]\n\
-        ldrb r5, [r0, 0xC]\n\
-        lsls r0, r4, 16\n\
-        cmp r5, r4\n\
-        bcs _081BEF32\n\
-        str r0, [sp, 0xC]\n\
-    _081BEE9E:\n\
-        movs r6, 0\n\
-        adds r0, r5, 0x1\n\
-        str r0, [sp, 0x4]\n\
-        lsls r4, r5, 3\n\
-        movs r2, 0x5F\n\
-        subs r1, r2, r5\n\
-        lsls r0, r1, 1\n\
-        adds r0, r1\n\
-        lsls r0, 4\n\
-        mov r9, r0\n\
-    _081BEEB2:\n\
-        ldr r0, =gUnknown_0203CF04\n\
-        ldr r0, [r0]\n\
-        ldr r7, =gUnknown_0203CF10\n\
-        ldr r3, [r7]\n\
-        adds r3, r4, r3\n\
-        ldrb r2, [r3, 0x4]\n\
-        adds r1, r2, 0x1\n\
-        strb r1, [r3, 0x4]\n\
-        lsls r2, 24\n\
-        lsrs r2, 24\n\
-        ldr r1, [r3]\n\
-        adds r1, r2\n\
-        ldrb r1, [r1]\n\
-        add r1, r9\n\
-        lsls r1, 16\n\
-        lsrs r1, 16\n\
-        movs r2, 0x1\n\
-        mov r8, r2\n\
-        str r2, [sp]\n\
-        movs r2, 0\n\
-        movs r3, 0x30\n\
-        bl sub_81BF2B8\n\
-        adds r0, r6, 0x1\n\
-        lsls r0, 24\n\
-        lsrs r6, r0, 24\n\
-        cmp r6, 0\n\
-        beq _081BEEB2\n\
-        ldr r0, [r7]\n\
-        adds r1, r4, r0\n\
-        ldrb r0, [r1, 0x4]\n\
-        cmp r0, 0x2F\n\
-        bls _081BEF24\n\
-        ldr r0, [r1]\n\
-        bl Free\n\
-        ldr r0, [r7]\n\
-        adds r0, r4, r0\n\
-        movs r1, 0\n\
-        str r1, [r0]\n\
-        ldr r1, [sp, 0x8]\n\
-        add r1, r10\n\
-        lsls r1, 3\n\
-        ldr r4, =gTasks\n\
-        adds r1, r4\n\
-        ldrh r0, [r1, 0xC]\n\
-        adds r0, 0x1\n\
-        strh r0, [r1, 0xC]\n\
-        mov r0, r8\n\
-        ands r5, r0\n\
-        cmp r5, 0x1\n\
-        bne _081BEF24\n\
-        ldr r0, =gUnknown_0203CF14\n\
-        ldr r1, [r0]\n\
-        ldrh r0, [r1, 0x2]\n\
-        subs r0, 0x1\n\
-        strh r0, [r1, 0x2]\n\
-    _081BEF24:\n\
-        ldr r1, [sp, 0x4]\n\
-        lsls r0, r1, 16\n\
-        lsrs r5, r0, 16\n\
-        ldr r2, [sp, 0xC]\n\
-        lsrs r0, r2, 16\n\
-        cmp r5, r0\n\
-        bcc _081BEE9E\n\
-    _081BEF32:\n\
-        ldr r0, =gUnknown_0203CF04\n\
-        ldr r1, [r0]\n\
-        movs r2, 0x92\n\
-        lsls r2, 4\n\
-        movs r0, 0\n\
-        movs r3, 0\n\
-        bl LoadBgTiles\n\
-        ldr r0, =gUnknown_0203CF10\n\
-        ldr r0, [r0]\n\
-        movs r4, 0xBE\n\
-        lsls r4, 2\n\
-        adds r0, r4\n\
-        ldrb r0, [r0, 0x4]\n\
-        cmp r0, 0x2F\n\
-        bhi _081BF002\n\
-        b _081BF014\n\
-        .pool\n\
-    _081BEF64:\n\
-        movs r0, 0\n\
-        bl UnsetBgTilemapBuffer\n\
-        ldr r0, =sub_81BEBB4\n\
-        bl FindTaskIdByFunc\n\
-        lsls r0, 24\n\
-        lsrs r0, 24\n\
-        cmp r0, 0xFF\n\
-        beq _081BEF7C\n\
-        bl DestroyTask\n\
-    _081BEF7C:\n\
-        ldr r0, =gUnknown_0203CF14\n\
-        ldr r1, [r0]\n\
-        movs r0, 0\n\
-        strh r0, [r1]\n\
-        strh r0, [r1, 0x2]\n\
-        bl sub_81BEB90\n\
-        b _081BF002\n\
-        .pool\n\
-    _081BEF94:\n\
-        ldr r4, =gUnknown_0203CF14\n\
-        ldr r0, [r4]\n\
-        bl Free\n\
-        movs r5, 0\n\
-        str r5, [r4]\n\
-        ldr r4, =gUnknown_0203CF10\n\
-        ldr r0, [r4]\n\
-        bl Free\n\
-        str r5, [r4]\n\
-        ldr r4, =gUnknown_0203CF04\n\
-        ldr r0, [r4]\n\
-        bl Free\n\
-        str r5, [r4]\n\
-        ldr r4, =gUnknown_0203CF08\n\
-        ldr r0, [r4]\n\
-        bl Free\n\
-        str r5, [r4]\n\
-        b _081BF002\n\
-        .pool\n\
-    _081BEFD0:\n\
-        movs r0, 0xC\n\
-        movs r1, 0x2\n\
-        bl SetGpuRegBits\n\
-        movs r0, 0x8\n\
-        movs r1, 0\n\
-        bl SetGpuRegBits\n\
-        movs r0, 0\n\
-        movs r1, 0x7\n\
-        movs r2, 0\n\
-        bl SetBgAttribute\n\
-        bl sub_81971D0\n\
-        b _081BF002\n\
-    _081BEFF0:\n\
-        movs r0, 0\n\
-        bl ShowBg\n\
-        b _081BF002\n\
-    _081BEFF8:\n\
-        mov r0, r10\n\
-        bl DestroyTask\n\
-        bl EnableBothScriptContexts\n\
-    _081BF002:\n\
-        ldr r0, =gTasks\n\
-        mov r2, r10\n\
-        lsls r1, r2, 2\n\
-        add r1, r10\n\
-        lsls r1, 3\n\
-        adds r1, r0\n\
-        ldrh r0, [r1, 0x8]\n\
-        adds r0, 0x1\n\
-        strh r0, [r1, 0x8]\n\
-    _081BF014:\n\
-        add sp, 0x10\n\
-        pop {r3-r5}\n\
-        mov r8, r3\n\
-        mov r9, r4\n\
-        mov r10, r5\n\
-        pop {r4-r7}\n\
-        pop {r0}\n\
-        bx r0\n\
-        .pool\n\
-        .syntax divided");
-}
-#endif // NONMATCHING
-
 static void sub_81BF028(u8 taskId)
 {
     u16 i;
+    u8 *buffer;
 
-    switch(gTasks[taskId].data[0])
+    switch (gTasks[taskId].data[0])
     {
     case 1:
-        gUnknown_0203CF0C = (struct Struct203CF0C *)AllocZeroed(sizeof(struct Struct203CF0C));
-        gUnknown_0203CF0C->frameImageTiles = (u8 *)AllocZeroed(ROOT_FOSSIL_GFX_LENGTH);
-        gUnknown_0203CF0C->frameImage = (struct DynamicSpriteFrameImage *) AllocZeroed(sizeof(struct DynamicSpriteFrameImage));
-        gUnknown_0203CF0C->unkC = (u16 *)AllocZeroed(ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH * sizeof(u16));
-        gUnknown_0203CF0C->unk10 = 0;
+        sUnknown_0203CF0C = AllocZeroed(sizeof(*sUnknown_0203CF0C));
+        sUnknown_0203CF0C->frameImageTiles = AllocZeroed(ROOT_FOSSIL_GFX_LENGTH);
+        sUnknown_0203CF0C->frameImage = AllocZeroed(sizeof(*sUnknown_0203CF0C->frameImage));
+        sUnknown_0203CF0C->unkC = AllocZeroed(ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH * sizeof(u16));
+        sUnknown_0203CF0C->unk10 = 0;
         break;
     case 2:
-        {
-            u8 *buffer;
-            buffer = gUnknown_0203CF0C->frameImageTiles;
-            for(i = 0; i < ROOT_FOSSIL_GFX_LENGTH; i++, buffer++)
-                *buffer = gRootFossil_Gfx[i];
-        }
+        buffer = sUnknown_0203CF0C->frameImageTiles;
+        for (i = 0; i < ROOT_FOSSIL_GFX_LENGTH; i++, buffer++)
+            *buffer = gRootFossil_Gfx[i];
         break;
     case 3:
-        gUnknown_0203CF0C->frameImage->data = gUnknown_0203CF0C->frameImageTiles;
-        gUnknown_0203CF0C->frameImage->size = ROOT_FOSSIL_GFX_LENGTH;
+        sUnknown_0203CF0C->frameImage->data = sUnknown_0203CF0C->frameImageTiles;
+        sUnknown_0203CF0C->frameImage->size = ROOT_FOSSIL_GFX_LENGTH;
         break;
     case 4:
         {
-            u8 spriteId, zero;
             struct SpriteTemplate fossilTemplate;
 
             fossilTemplate = gUnknown_08617E00;
-            fossilTemplate.images = (struct SpriteFrameImage *)(gUnknown_0203CF0C->frameImage);
-            spriteId = CreateSprite(&fossilTemplate, 128, -16, 1);
-            gUnknown_0203CF0C->spriteId = spriteId;
-            zero = 0;
-            gSprites[gUnknown_0203CF0C->spriteId].centerToCornerVecX = zero;
-            gSprites[gUnknown_0203CF0C->spriteId].data[0] = gSprites[gUnknown_0203CF0C->spriteId].pos1.x;
-            gSprites[gUnknown_0203CF0C->spriteId].data[1] = 1;
+            fossilTemplate.images = (struct SpriteFrameImage *)(sUnknown_0203CF0C->frameImage);
+            sUnknown_0203CF0C->spriteId = CreateSprite(&fossilTemplate, 128, -16, 1);
+            gSprites[sUnknown_0203CF0C->spriteId].centerToCornerVecX = 0;
+            gSprites[sUnknown_0203CF0C->spriteId].data[0] = gSprites[sUnknown_0203CF0C->spriteId].pos1.x;
+            gSprites[sUnknown_0203CF0C->spriteId].data[1] = 1;
         }
     case 5:
-        for(i = 0; i < ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH; i++)
-            gUnknown_0203CF0C->unkC[i] = i;
+        for (i = 0; i < ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH; i++)
+            sUnknown_0203CF0C->unkC[i] = i;
         break;
     case 6:
+        for (i = 0; i < (ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH * sizeof(u16)); i++)
         {
-            u16 rand1, rand2, temp, j;
-            j = (ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH * sizeof(u16)) - 1;
-            for(i = 0; i <= j; i++)
-            {
-                rand1 = Random() % 0x100;
-                rand2 = Random() % 0x100;
-                j = (ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH * sizeof(u16)) - 1;
-                temp = gUnknown_0203CF0C->unkC[rand2];
-                gUnknown_0203CF0C->unkC[rand2] = gUnknown_0203CF0C->unkC[rand1];
-                gUnknown_0203CF0C->unkC[rand1] = temp;
-            }
-            gSprites[gUnknown_0203CF0C->spriteId].callback = sub_81BF248;
-            break;
+            u16 rand1, rand2, temp;
+
+            rand1 = Random() % 0x100;
+            rand2 = Random() % 0x100;
+            SWAP(sUnknown_0203CF0C->unkC[rand2], sUnknown_0203CF0C->unkC[rand1], temp);
         }
+        gSprites[sUnknown_0203CF0C->spriteId].callback = sub_81BF248;
+        break;
     case 7:
-        if(gSprites[gUnknown_0203CF0C->spriteId].callback != SpriteCallbackDummy)
+        if (gSprites[sUnknown_0203CF0C->spriteId].callback != SpriteCallbackDummy)
             return;
-        DestroySprite(&gSprites[gUnknown_0203CF0C->spriteId]);
-        FREE_AND_SET_NULL(gUnknown_0203CF0C->unkC);;
-        FREE_AND_SET_NULL(gUnknown_0203CF0C->frameImage);
-        FREE_AND_SET_NULL(gUnknown_0203CF0C->frameImageTiles);
-        FREE_AND_SET_NULL(gUnknown_0203CF0C);
+        DestroySprite(&gSprites[sUnknown_0203CF0C->spriteId]);
+        FREE_AND_SET_NULL(sUnknown_0203CF0C->unkC);;
+        FREE_AND_SET_NULL(sUnknown_0203CF0C->frameImage);
+        FREE_AND_SET_NULL(sUnknown_0203CF0C->frameImageTiles);
+        FREE_AND_SET_NULL(sUnknown_0203CF0C);
         break;
     case 8:
         EnableBothScriptContexts();
+        break;
     }
-    ++gTasks[taskId].data[0];
+
+    gTasks[taskId].data[0]++;
 }
 
 static void sub_81BF248(struct Sprite *sprite)
 {
-    if (gUnknown_0203CF0C->unk10 >= (ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH))
+    if (sUnknown_0203CF0C->unk10 >= (ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH))
     {
         sprite->callback = SpriteCallbackDummy;
     }
@@ -759,7 +407,7 @@ static void sub_81BF248(struct Sprite *sprite)
         u8 i;
         for (i = 0; i < 2; i++)
         {
-            sub_81BF2B8(gUnknown_0203CF0C->frameImageTiles, gUnknown_0203CF0C->unkC[gUnknown_0203CF0C->unk10++], 0, 16, 0);
+            sub_81BF2B8(sUnknown_0203CF0C->frameImageTiles, sUnknown_0203CF0C->unkC[sUnknown_0203CF0C->unk10++], 0, 16, 0);
         }
         StartSpriteAnim(sprite, 0);
     }
@@ -768,3 +416,146 @@ static void sub_81BF248(struct Sprite *sprite)
         sprite->pos1.y++;
     }
 }
+
+#ifdef NONMATCHING
+static void sub_81BF2B8(u8* a, u16 b, u8 c, u8 d, u8 e)
+{
+    u8 r5, r4, r0, r2;
+    u16 var;
+
+    r4 = r5 = b / d;
+    gUnknown_030012A8[0] = r4;
+
+    r0 = r2 = b % d;
+    gUnknown_030012A8[1] = r2;
+
+    r4 &= 7;
+    r2 &= 7;
+    gUnknown_030012A8[2] = r4;
+    gUnknown_030012A8[3] = r2;
+
+    r0 /= 8;
+    r5 /= 8;
+    gUnknown_030012A8[4] = r0;
+    gUnknown_030012A8[5] = r5;
+
+    var = ((d / 8) * (r5 * 64)) + (r0 * 64);
+    gUnknown_030012A8[6] = var;
+
+    var += (r4 * 8) + r2;
+    gUnknown_030012A8[7] = var;
+
+    // This part is non-matching. 99% sure it IS functionally equivalent, though.
+    b = (b & 1) ^ 1;
+    c = (c << ((b) << 2)) | (15 << ((b ^ 1) << 2));
+
+    a[(var / 2) + (e * 32)] &= c;
+}
+
+#else
+NAKED
+static void sub_81BF2B8(u8* a, u16 b, u8 c, u8 d, u8 e)
+{
+    asm_unified("\n\
+    push {r4-r7,lr}\n\
+	mov r7, r10\n\
+	mov r6, r9\n\
+	mov r5, r8\n\
+	push {r5-r7}\n\
+	sub sp, 0x8\n\
+	str r0, [sp]\n\
+	mov r10, r1\n\
+	adds r6, r2, 0\n\
+	mov r8, r3\n\
+	ldr r0, [sp, 0x28]\n\
+	mov r9, r0\n\
+	lsls r1, 16\n\
+	lsrs r1, 16\n\
+	mov r10, r1\n\
+	lsls r6, 24\n\
+	lsrs r6, 24\n\
+	mov r0, r8\n\
+	lsls r0, 24\n\
+	mov r8, r0\n\
+	lsrs r7, r0, 24\n\
+	mov r1, r9\n\
+	lsls r1, 24\n\
+	lsrs r1, 24\n\
+	mov r9, r1\n\
+	mov r0, r10\n\
+	adds r1, r7, 0\n\
+	bl __divsi3\n\
+	adds r5, r0, 0\n\
+	lsls r5, 24\n\
+	lsrs r4, r5, 24\n\
+	ldr r3, =gUnknown_030012A8\n\
+	strh r4, [r3]\n\
+	mov r0, r10\n\
+	adds r1, r7, 0\n\
+	str r3, [sp, 0x4]\n\
+	bl __modsi3\n\
+	lsls r0, 24\n\
+	lsrs r2, r0, 24\n\
+	ldr r3, [sp, 0x4]\n\
+	strh r2, [r3, 0x2]\n\
+	movs r1, 0x7\n\
+	ands r4, r1\n\
+	ands r2, r1\n\
+	strh r4, [r3, 0x4]\n\
+	strh r2, [r3, 0x6]\n\
+	lsrs r0, 27\n\
+	lsrs r5, 27\n\
+	strh r0, [r3, 0x8]\n\
+	strh r5, [r3, 0xA]\n\
+	mov r1, r8\n\
+	lsrs r1, 27\n\
+	lsls r1, 6\n\
+	mov r8, r1\n\
+	mov r1, r8\n\
+	muls r1, r5\n\
+	lsls r0, 6\n\
+	adds r1, r0\n\
+	lsls r1, 16\n\
+	lsrs r1, 16\n\
+	strh r1, [r3, 0xC]\n\
+	lsls r4, 3\n\
+	adds r4, r2\n\
+	adds r1, r4\n\
+	lsls r4, r1, 16\n\
+	lsrs r4, 17\n\
+	strh r1, [r3, 0xE]\n\
+	movs r1, 0x1\n\
+	mov r0, r10\n\
+	ands r1, r0\n\
+	movs r2, 0x1\n\
+	eors r1, r2\n\
+	lsls r0, r1, 2\n\
+	lsls r6, r0\n\
+	eors r1, r2\n\
+	lsls r1, 2\n\
+	movs r0, 0xF\n\
+	lsls r0, r1\n\
+	orrs r6, r0\n\
+	lsls r6, 24\n\
+	lsrs r6, 24\n\
+	mov r1, r9\n\
+	lsls r1, 5\n\
+	mov r9, r1\n\
+	add r9, r4\n\
+	ldr r1, [sp]\n\
+	add r1, r9\n\
+	ldrb r0, [r1]\n\
+	ands r6, r0\n\
+	strb r6, [r1]\n\
+	add sp, 0x8\n\
+	pop {r3-r5}\n\
+	mov r8, r3\n\
+	mov r9, r4\n\
+	mov r10, r5\n\
+	pop {r4-r7}\n\
+	pop {r0}\n\
+	bx r0\n\
+	.pool\n\
+                ");
+}
+#endif // NONMATCHING