32/64 shmem bihash interoperability

[vpp.git] / src / vppinfra / bihash_16_8_32.h

diff --git a/src/vppinfra/bihash_16_8_32.h b/src/vppinfra/bihash_16_8_32.h
new file mode 100644 (file)
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--- /dev/null
+++ b/src/vppinfra/bihash_16_8_32.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2018 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
+#undef BIHASH_KVP_PER_PAGE
+
+#define BIHASH_TYPE _16_8_32
+#define BIHASH_KVP_PER_PAGE 4
+
+#define BIHASH_32_64_SVM 1
+
+#ifndef __included_bihash_16_18_32_h__
+#define __included_bihash_16_18_32_h__
+
+#include <vppinfra/heap.h>
+#include <vppinfra/format.h>
+#include <vppinfra/pool.h>
+#include <vppinfra/xxhash.h>
+#include <vppinfra/crc32.h>
+
+typedef struct
+{
+  u64 key[2];
+  u64 value;
+} clib_bihash_kv_16_8_32_t;
+
+static inline int
+clib_bihash_is_free_16_8_32 (clib_bihash_kv_16_8_32_t * v)
+{
+  /* Free values are memset to 0xff, check a bit... */
+  if (v->key[0] == ~0ULL && v->value == ~0ULL)
+    return 1;
+  return 0;
+}
+
+static inline u64
+clib_bihash_hash_16_8_32 (clib_bihash_kv_16_8_32_t * v)
+{
+#ifdef clib_crc32c_uses_intrinsics
+  return clib_crc32c ((u8 *) v->key, 16);
+#else
+  u64 tmp = v->key[0] ^ v->key[1];
+  return clib_xxhash (tmp);
+#endif
+}
+
+static inline u8 *
+format_bihash_kvp_16_8_32 (u8 * s, va_list * args)
+{
+  clib_bihash_kv_16_8_32_t *v = va_arg (*args, clib_bihash_kv_16_8_32_t *);
+
+  s = format (s, "key %llu %llu value %llu", v->key[0], v->key[1], v->value);
+  return s;
+}
+
+static inline int
+clib_bihash_key_compare_16_8_32 (u64 * a, u64 * b)
+{
+#if defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
+  u64x2 v;
+  v = u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
+  return u64x2_is_all_zero (v);
+#else
+  return ((a[0] ^ b[0]) | (a[1] ^ b[1])) == 0;
+#endif
+}
+
+#undef __included_bihash_template_h__
+#include <vppinfra/bihash_template.h>
+
+#endif /* __included_bihash_16_8_32_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */