-/* If we need to support > 4096, just expand this to be a 64 bit
- * union, or consider tiling in Z as well.
+#define TEX_ADDR_BITS (SP_MAX_TEXTURE_2D_LEVELS - 1 - TILE_SIZE_LOG2)
+#define TEX_Z_BITS (SP_MAX_TEXTURE_2D_LEVELS - 1)
+
+/**
+ * Texture tile address as a union for fast compares.