1 files changed, 20 insertions, 1 deletions
diff --git a/xc/extras/Mesa/src/mmath.c b/xc/extras/Mesa/src/mmath.c
index 06d134955..d93400d20 100644
--- a/xc/extras/Mesa/src/mmath.c
+++ b/xc/extras/Mesa/src/mmath.c
@@ -140,7 +140,8 @@ init_ubyte_color_tab(void)
 /*
  * Initialize tables, etc for fast math functions.
  */
-void _mesa_init_math(void)
+void
+_mesa_init_math(void)
 {
    static GLboolean initialized = GL_FALSE;
 
@@ -166,3 +167,21 @@ void _mesa_init_math(void)
 #endif
    }
 }
+
+
+
+/*
+ * Return number of bits set in given GLuint.
+ */
+GLuint
+_mesa_bitcount(GLuint n)
+{
+   GLuint bits;
+   for (bits = 0; n > 0; n = n >> 1) {
+      if (n & 1) {
+         bits++;
+      }
+   }
+   return bits;
+}
+