#endif
+/**
+ * Is x a power of two?
+ */
+static INLINE int
+_mesa_is_pow_two(int x)
+{
+ return !(x & (x - 1));
+}
+
+
/***
*** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255]
*** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255]