vppinfra: add clear_lowest_set_bit() function, use BMI2 if available
Type: improvement
#endif
#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)
{
