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-rw-r--r--src/vppinfra/bitops.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/src/vppinfra/bitops.h b/src/vppinfra/bitops.h
index 17ad49ffb46..04365699f93 100644
--- a/src/vppinfra/bitops.h
+++ b/src/vppinfra/bitops.h
@@ -176,6 +176,32 @@ do { \
} \
} while (0)
+static_always_inline u64
+reset_lowest_set_bit (u64 x)
+{
+#ifdef __BMI__
+ return _blsr_u64 (x);
+#else
+ return x & (x - 1);
+#endif
+}
+
+static_always_inline u64
+get_lowest_set_bit (u64 x)
+{
+#ifdef __BMI__
+ return _blsi_u64 (x);
+#else
+ return x & -x;
+#endif
+}
+
+static_always_inline u64
+get_lowest_set_bit_index (u64 x)
+{
+ return __builtin_ctzll (x);
+}
+
#endif /* included_clib_bitops_h */
/*