1 files changed, 116 insertions, 0 deletions
diff --git a/src/vppinfra/bihash_48_8.h b/src/vppinfra/bihash_48_8.h
new file mode 100644
index 00000000000..1a6e76913ed
--- /dev/null
+++ b/src/vppinfra/bihash_48_8.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#undef BIHASH_TYPE
+
+#define BIHASH_TYPE _48_8
+#define BIHASH_KVP_PER_PAGE 4
+
+#ifndef __included_bihash_48_8_h__
+#define __included_bihash_48_8_h__
+
+#include <vppinfra/heap.h>
+#include <vppinfra/format.h>
+#include <vppinfra/pool.h>
+#include <vppinfra/xxhash.h>
+
+typedef struct
+{
+  u64 key[6];
+  u64 value;
+} clib_bihash_kv_48_8_t;
+
+static inline int
+clib_bihash_is_free_48_8 (const clib_bihash_kv_48_8_t * v)
+{
+  /* Free values are memset to 0xff, check a bit... */
+  if (v->key[0] == ~0ULL && v->value == ~0ULL)
+    return 1;
+  return 0;
+}
+
+#if __SSE4_2__
+#ifndef __defined_crc_u32__
+#define __defined_crc_u32__
+static inline u32
+crc_u32 (u32 data, u32 value)
+{
+  __asm__ volatile ("crc32l %[data], %[value];":[value] "+r" (value):[data]
+		    "rm" (data));
+  return value;
+}
+#endif /* __defined_crc_u32__ */
+
+static inline u64
+clib_bihash_hash_48_8 (const clib_bihash_kv_48_8_t * v)
+{
+  const u32 *dp = (const u32 *) &v->key[0];
+  u32 value = 0;
+
+  value = crc_u32 (dp[0], value);
+  value = crc_u32 (dp[1], value);
+  value = crc_u32 (dp[2], value);
+  value = crc_u32 (dp[3], value);
+  value = crc_u32 (dp[4], value);
+  value = crc_u32 (dp[5], value);
+  value = crc_u32 (dp[6], value);
+  value = crc_u32 (dp[7], value);
+  value = crc_u32 (dp[8], value);
+  value = crc_u32 (dp[9], value);
+  value = crc_u32 (dp[10], value);
+  value = crc_u32 (dp[11], value);
+
+  return value;
+}
+#else
+static inline u64
+clib_bihash_hash_48_8 (const clib_bihash_kv_48_8_t * v)
+{
+  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2] ^ v->key[3] ^ v->key[4]
+    ^ v->key[5];
+  return clib_xxhash (tmp);
+}
+#endif
+
+static inline u8 *
+format_bihash_kvp_48_8 (u8 * s, va_list * args)
+{
+  clib_bihash_kv_48_8_t *v = va_arg (*args, clib_bihash_kv_48_8_t *);
+
+  s = format (s, "key %llu %llu %llu %llu %llu %llu value %llu", v->key[0],
+	      v->key[1], v->key[2], v->key[3], v->key[4], v->key[5],
+	      v->value);
+  return s;
+}
+
+static inline int
+clib_bihash_key_compare_48_8 (const u64 * a, const u64 * b)
+{
+  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3])
+	  | (a[4] ^ b[4]) | (a[5] ^ b[5])) == 0;
+}
+
+#undef __included_bihash_template_h__
+#include <vppinfra/bihash_template.h>
+
+#endif /* __included_bihash_48_8_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */