util: Add inline function for approximate floating point comparison.

2010-05-27 16:16:11 +01:00
parent f503b3dd9d
commit b57e18c35c
1 changed files with 9 additions and 0 deletions
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -335,6 +335,15 @@ util_iround(float f)
 }


+/**
+ * Approximate floating point comparison
+ */
+static INLINE boolean
+util_is_approx(float a, float b, float tol)
+{
+   return fabs(b - a) <= tol;
+}
+

 /**
 * Test if x is NaN or +/- infinity.