1 files changed, 21 insertions, 0 deletions
diff --git a/src/mesa/main/imports.c b/src/mesa/main/imports.c
index 996839a20e9..ad77373075b 100644
--- a/src/mesa/main/imports.c
+++ b/src/mesa/main/imports.c
@@ -574,6 +574,27 @@ _mesa_ffs(int i)
 #endif
 }
 
+int
+_mesa_ffsll(long long val)
+{
+#ifdef ffsll
+	return ffsll(val);
+#else
+	int bit;
+
+	assert(sizeof(val) == 8);
+
+	bit = ffs(val);
+	if (bit != 0)
+		return bit;
+
+	bit = ffs(val >> 32);
+	if (bit != 0)
+		return 32 + bit;
+
+	return 0;
+#endif
+}
 
 /**
  * Return number of bits set in given GLuint.