Optimize P_DivlineSide

Author: jserv

src/p_sight.c

@@ -91,12 +91,7 @@ P_DivlineSide
     left =  (node->dy>>FRACBITS) * (dx>>FRACBITS);
     right = (dy>>FRACBITS) * (node->dx>>FRACBITS);
 
-    if (right < left)
-        return 0;       // front side
-
-    if (left == right)
-        return 2;
-    return 1;           // back side
+    return (left <= right) + (left == right);
 }
 
 
@@ -271,9 +266,7 @@ boolean P_CrossBSPNode (int bspnum)
     bsp = &nodes[bspnum];
 
     // decide which side the start point is on
-    side = P_DivlineSide (strace.x, strace.y, (divline_t *)bsp);
-    if (side == 2)
-        side = 0;       // an "on" should cross both sides
+    side = P_DivlineSide (strace.x, strace.y, (divline_t *)bsp) & 1;
 
     // cross the starting side
     if (!P_CrossBSPNode (bsp->children[side]) )