P01 GetClut

#   ROUTINE: COMBINE 16-BIT VALUE (0x23A54)
#       Parameters:
#           r4 = Clut X value (limited to multiples of 0x10)
#           r5 = Clut Y value (no multiple limit?)
#       Returns:
#           r2 = Clut ID
#               0x001f: Clut X
#               0xffe0: Clut Y

80023a54: 00051180 sll r2,r5,0x06                   #   y << 6
80023a58: 00042103 sra r4,r4,0x04                   #   x >> 4
80023a5c: 3084003f andi r4,r4,0x003f                #   (x >> 4) & 0x3f
80023a60: 00441025 or r2,r2,r4                      #   (y << 6) | ((x >> 4) & 0x3f)
80023a64: 03e00008 jr r31                           #   return ((y << 6) | ((x >> 4) & 0x3f)) & 0xffff;
80023a68: 3042ffff andi r2,r2,0xffff