From: Damjan Marion <damarion@cisco.com>
Date: Wed, 5 Jan 2022 13:06:34 +0000 (+0100)
Subject: vppinfra: few bitops inlines
X-Git-Tag: v22.06-rc0~71
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=fdc874af1ea8be505cd5d88663215e4f4481a7a6;p=vpp.git

vppinfra: few bitops inlines

Change-Id: I9aa01fafd5329a399aa9d72a6e2cc6c9d65dc85c
Type: improvement
Signed-off-by: Damjan Marion <damarion@cisco.com>
---

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 */
 
 /*