Ensure there isn't a stream of tiles repeatedly

ivandardi · Oct 15, 2016 · 791cc26 · 791cc26
1 parent 35255f4
commit 791cc26
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/main.asm b/main.asm
@@ -316,12 +316,17 @@ FUNCTION_BEGIN CreateRandomTiles
 CreateRandomTiles.forloop:
     beq  $s0, $s1, CreateRandomTiles.endforloop
 
+CreateRandomTiles.retryunique:
     # Get random number in interval [0, 3]
     xor  $a0, $a0, $a0
     syscall
 
     # Add 1 to get [1, 4]
     addi $a0, $a0, 1
+
+    # Ensure that the new tile isn't the same as the previous one
+    lw   $t0, -4($s0)
+    beq  $t0, $a0, CreateRandomTiles.retryunique
 
     # Write to the vector
     sw   $a0, 0($s0)