[dpdk-dev] [PATCH v6 1/9] eal: introduce macros for getting value for bit

Parav Pandit parav at mellanox.com
Thu Jul 16 09:29:30 CEST 2020


There are several drivers which duplicate bit generation macro.
Introduce a generic bit macros so that such drivers avoid redefining
same in multiple drivers.

Signed-off-by: Parav Pandit <parav at mellanox.com>
Acked-by: Matan Azrad <matan at mellanox.com>
Acked-by: Morten Brørup <mb at smartsharesystems.com>
---
Changelog:
v4->v5:
 - Addressed comments from Morten Brørup
 - Renamed newly added macro to RTE_BIT64
 - Added doxygen comment section for the macro
v1->v2:
 - Addressed comments from Thomas and Gaten.
 - Avoided new file, added macro to rte_bitops.h
---
 lib/librte_eal/include/rte_bitops.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/librte_eal/include/rte_bitops.h b/lib/librte_eal/include/rte_bitops.h
index 740927f3b..ca46a110f 100644
--- a/lib/librte_eal/include/rte_bitops.h
+++ b/lib/librte_eal/include/rte_bitops.h
@@ -17,6 +17,14 @@
 #include <rte_debug.h>
 #include <rte_compat.h>
 
+/**
+ * Get the uint64_t value for a specified bit set.
+ *
+ * @param nr
+ *   The bit number in range of 0 to 63.
+ */
+#define RTE_BIT64(nr) (UINT64_C(1) << (nr))
+
 /*------------------------ 32-bit relaxed operations ------------------------*/
 
 /**
-- 
2.26.2



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