diff mbox

[dpdk-dev,5/8] ACL: introduce RTE_ACL_MASKLEN_TO_BITMASK macro

Message ID 1433373024-5558-6-git-send-email-konstantin.ananyev@intel.com (mailing list archive)
State Superseded, archived
Headers show

Commit Message

Konstantin Ananyev June 3, 2015, 11:10 p.m. UTC
Introduce new RTE_ACL_MASKLEN_TO_BITMASK macro, that will be used
in several places inside librte_acl and it's UT.
Simplify iand cleanup build_trie() code a bit.

Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
---
 lib/librte_acl/acl_bld.c | 16 +++-------------
 lib/librte_acl/rte_acl.h |  3 +++
 2 files changed, 6 insertions(+), 13 deletions(-)
diff mbox

Patch

diff --git a/lib/librte_acl/acl_bld.c b/lib/librte_acl/acl_bld.c
index 4bcf637..e144503 100644
--- a/lib/librte_acl/acl_bld.c
+++ b/lib/librte_acl/acl_bld.c
@@ -1262,19 +1262,9 @@  build_trie(struct acl_build_context *context, struct rte_acl_build_rule *head,
 				 * all higher bits.
 				 */
 				uint64_t mask;
-
-				if (fld->mask_range.u32 == 0) {
-					mask = 0;
-
-				/*
-				 * arithmetic right shift for the length of
-				 * the mask less the msb.
-				 */
-				} else {
-					mask = -1 <<
-						(rule->config->defs[n].size *
-						CHAR_BIT - fld->mask_range.u32);
-				}
+				mask = RTE_ACL_MASKLEN_TO_BITMASK(
+					fld->mask_range.u32,
+					rule->config->defs[n].size);
 
 				/* gen a mini-trie for this field */
 				merge = acl_gen_mask_trie(context,
diff --git a/lib/librte_acl/rte_acl.h b/lib/librte_acl/rte_acl.h
index 8d9bbe5..bd8f892 100644
--- a/lib/librte_acl/rte_acl.h
+++ b/lib/librte_acl/rte_acl.h
@@ -122,6 +122,9 @@  enum {
 
 #define	RTE_ACL_INVALID_USERDATA	0
 
+#define	RTE_ACL_MASKLEN_TO_BITMASK(v, s)	\
+((v) == 0 ? (v) : (typeof(v))((uint64_t)-1 << ((s) * CHAR_BIT - (v))))
+
 /**
  * Miscellaneous data for ACL rule.
  */