1 files changed, 23 insertions, 0 deletions
diff --git a/src/include/math.h b/src/include/math.h
new file mode 100644
index 000000000..eddb92f64
--- /dev/null
+++ b/src/include/math.h
@@ -0,0 +1,23 @@
+#include <stdint.h>
+#include <builtins.h>
+
+#ifndef _MATH_H
+#define _MATH_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+ALWAYS_INLINE
+static inline int64_t log2(uint64_t s)
+{
+    int64_t n = cntlzd(s);
+    return 63-n;
+}
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif