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-rw-r--r--src/gallium/auxiliary/util/u_math.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index 4c6c2bc00e1..b12c97dfb4d 100644
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -341,6 +341,16 @@ util_is_inf_or_nan(float x)
/**
+ * Test whether x is a power of two.
+ */
+static INLINE boolean
+util_is_pot(unsigned x)
+{
+ return (x & (x - 1)) == 0;
+}
+
+
+/**
* Find first bit set in word. Least significant bit is 1.
* Return 0 if no bits set.
*/