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-rw-r--r--src/vppinfra/clib.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/vppinfra/clib.h b/src/vppinfra/clib.h
index 22377c61440..05af8fe7168 100644
--- a/src/vppinfra/clib.h
+++ b/src/vppinfra/clib.h
@@ -159,6 +159,16 @@
#if defined (count_leading_zeros)
always_inline uword
+clear_lowest_set_bit (uword x)
+{
+#ifdef __BMI2__
+ return _blsr_u64 (x);
+#else
+ return x ^ (1ULL << count_trailing_zeros (x));
+#endif
+}
+
+always_inline uword
min_log2 (uword x)
{
uword n;