2 files changed, 24 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.
diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h
index 19a9478f76a..d9885dbeec4 100644
--- a/src/mesa/main/imports.h
+++ b/src/mesa/main/imports.h
@@ -688,6 +688,9 @@ _mesa_pow(double x, double y);
 extern int
 _mesa_ffs(int i);
 
+extern int
+_mesa_ffsll(long long i);
+
 extern unsigned int
 _mesa_bitcount(unsigned int n);