2 files changed, 25 insertions, 40 deletions

diff --git a/src/battle_anim_effects_1.c b/src/battle_anim_effects_1.c
index 15b73a1e0..b3a67a509 100644
--- a/src/battle_anim_effects_1.c
+++ b/src/battle_anim_effects_1.c
@@ -5315,21 +5315,19 @@ static void sub_8102D8C(s16 a, s16 b, s16* c, s16* d, s8 e)
 
 static void sub_8102DE4(struct Sprite* sprite)
 {
-    int b;
-    s16 a;
-    int c;
+    s16 y, yDelta;
     u8 index;
+
     sprite->data[0]++;
-    b = sprite->data[0] * 5 - ((sprite->data[0] * 5 / 256) << 8);
+    yDelta = sprite->data[0] * 5 - ((sprite->data[0] * 5 / 256) << 8);
     sprite->data[4] += sprite->data[6];
     sprite->data[5] += sprite->data[7];
     sprite->pos1.x = sprite->data[4] >> 4;
     sprite->pos1.y = sprite->data[5] >> 4;
-    sprite->pos2.y = Sin(b, 15);
-    a = (u16)sprite->pos1.y;
-    c = (u16)sprite->pos1.x;
+    sprite->pos2.y = Sin(yDelta, 15);
 
-    if ((u32)((c + 16) << 16) > (0x110) << 16 || a < -16 || a > 0x80)
+    y = sprite->pos1.y;
+    if (sprite->pos1.x < -16 || sprite->pos1.x > 256 || y < -16 || y > 128)
     {
         DestroySpriteAndMatrix(sprite);
     }
@@ -5350,12 +5348,8 @@ static void sub_8102DE4(struct Sprite* sprite)
 
 void sub_8102EB0(struct Sprite* sprite)
 {
-    int a;
     if (GetBattlerSide(gBattleAnimAttacker) == B_SIDE_OPPONENT)
-    {
-        a = gBattleAnimArgs[1];
-        *(u16 *)&gBattleAnimArgs[1] = -a;
-    }
+        gBattleAnimArgs[1] *= -1;
 
     sprite->pos1.x = GetBattlerSpriteCoord(gBattleAnimAttacker, 2) + gBattleAnimArgs[1];
     sprite->pos1.y = GetBattlerSpriteCoord(gBattleAnimAttacker, 3) + gBattleAnimArgs[2];
@@ -5541,8 +5535,8 @@ static void sub_8103300(struct Sprite* sprite)
 
 static void sub_8103320(struct Sprite* sprite)
 {
-    s16 temp;
-    s16 temp2;
+    s16 x1, x2;
+
     sprite->data[1] += 4;
     if (sprite->data[1] > 254)
     {
@@ -5564,20 +5558,21 @@ static void sub_8103320(struct Sprite* sprite)
     if (sprite->data[1] > 0x9F)
         sprite->subpriority = sprite->data[2];
 
-    temp = gSineTable[sprite->data[1]];
-    sprite->pos2.x = (temp2 = temp >> 3) + (temp2 >> 1);
+    x1 = gSineTable[sprite->data[1]];
+    x2 = x1 >> 3;
+    sprite->pos2.x = (x1 >> 3) + (x2 >> 1);
 }
 
 void sub_8103390(struct Sprite* sprite)
 {
-    u8 bank;
+    u8 battler;
     if (gBattleAnimArgs[0] == 0)
-        bank = gBattleAnimAttacker;
+        battler = gBattleAnimAttacker;
     else
-        bank = gBattleAnimTarget;
+        battler = gBattleAnimTarget;
 
-    sub_810310C(bank, sprite);
-    if (GetBattlerSide(bank) == B_SIDE_PLAYER)
+    sub_810310C(battler, sprite);
+    if (GetBattlerSide(battler) == B_SIDE_PLAYER)
     {
         StartSpriteAnim(sprite, 0);
         sprite->data[0] = 2;
diff --git a/src/battle_anim_effects_3.c b/src/battle_anim_effects_3.c
index 07cbe0ffb..5d79a9e6b 100755
--- a/src/battle_anim_effects_3.c
+++ b/src/battle_anim_effects_3.c
@@ -2504,13 +2504,10 @@ void sub_815BE04(struct Sprite *sprite)
 
 static void sub_815BF44(struct Sprite *sprite)
 {
-    int var0;
-    s8 var1;
-
-    var0 = (u16)sprite->data[2] + (u16)sprite->data[3];
-    var1 = var0 >> 8;
-    sprite->pos2.y -= var1;
-    sprite->data[3] = var0 & 0xFF;
+    s16 delta = sprite->data[3] + sprite->data[2];
+    sprite->pos2.y -= delta >> 8;
+    sprite->data[3] += sprite->data[2];
+    sprite->data[3] &= 0xFF;
     if (sprite->data[4] == 0 && sprite->pos2.y < -8)
     {
         gSprites[sprite->data[6]].invisible = 0;
@@ -2543,19 +2540,12 @@ static void sub_815BFF4(struct Sprite *sprite)
 
 static void sub_815C050(struct Sprite *sprite)
 {
-    u16 d2;
-    register u16 d3 asm("r1");
-    int var0;
-    s8 var1;
-
     if (!sprite->invisible)
     {
-        d2 = sprite->data[2];
-        d3 = sprite->data[3];
-        var0 = d2 + d3;
-        var1 = var0 >> 8;
-        sprite->pos2.y -= var1;
-        sprite->data[3] = var0 & 0xFF;
+        s16 delta = sprite->data[3] + sprite->data[2];
+        sprite->pos2.y -= delta >> 8;
+        sprite->data[3] += sprite->data[2];
+        sprite->data[3] &= 0xFF;
         if (--sprite->data[1] == -1)
         {
             sprite->invisible = 1;