Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_hash / rte_cmp_x86.h

diff --git a/lib/librte_hash/rte_cmp_x86.h b/lib/librte_hash/rte_cmp_x86.h
new file mode 100644 (file)
index 0000000..e8c484d
--- /dev/null
+++ b/lib/librte_hash/rte_cmp_x86.h
@@ -0,0 +1,109 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* Functions to compare multiple of 16 byte keys (up to 128 bytes) */
+static int
+rte_hash_k16_cmp_eq(const void *key1, const void *key2, size_t key_len __rte_unused)
+{
+       const __m128i k1 = _mm_loadu_si128((const __m128i *) key1);
+       const __m128i k2 = _mm_loadu_si128((const __m128i *) key2);
+#ifdef RTE_MACHINE_CPUFLAG_SSE4_1
+       const __m128i x = _mm_xor_si128(k1, k2);
+
+       return !_mm_test_all_zeros(x, x);
+#else
+       const __m128i x = _mm_cmpeq_epi32(k1, k2);
+
+       return _mm_movemask_epi8(x) != 0xffff;
+#endif
+}
+
+static int
+rte_hash_k32_cmp_eq(const void *key1, const void *key2, size_t key_len)
+{
+       return rte_hash_k16_cmp_eq(key1, key2, key_len) ||
+               rte_hash_k16_cmp_eq((const char *) key1 + 16,
+                               (const char *) key2 + 16, key_len);
+}
+
+static int
+rte_hash_k48_cmp_eq(const void *key1, const void *key2, size_t key_len)
+{
+       return rte_hash_k16_cmp_eq(key1, key2, key_len) ||
+               rte_hash_k16_cmp_eq((const char *) key1 + 16,
+                               (const char *) key2 + 16, key_len) ||
+               rte_hash_k16_cmp_eq((const char *) key1 + 32,
+                               (const char *) key2 + 32, key_len);
+}
+
+static int
+rte_hash_k64_cmp_eq(const void *key1, const void *key2, size_t key_len)
+{
+       return rte_hash_k32_cmp_eq(key1, key2, key_len) ||
+               rte_hash_k32_cmp_eq((const char *) key1 + 32,
+                               (const char *) key2 + 32, key_len);
+}
+
+static int
+rte_hash_k80_cmp_eq(const void *key1, const void *key2, size_t key_len)
+{
+       return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
+               rte_hash_k16_cmp_eq((const char *) key1 + 64,
+                               (const char *) key2 + 64, key_len);
+}
+
+static int
+rte_hash_k96_cmp_eq(const void *key1, const void *key2, size_t key_len)
+{
+       return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
+               rte_hash_k32_cmp_eq((const char *) key1 + 64,
+                               (const char *) key2 + 64, key_len);
+}
+
+static int
+rte_hash_k112_cmp_eq(const void *key1, const void *key2, size_t key_len)
+{
+       return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
+               rte_hash_k32_cmp_eq((const char *) key1 + 64,
+                               (const char *) key2 + 64, key_len) ||
+               rte_hash_k16_cmp_eq((const char *) key1 + 96,
+                               (const char *) key2 + 96, key_len);
+}
+
+static int
+rte_hash_k128_cmp_eq(const void *key1, const void *key2, size_t key_len)
+{
+       return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
+               rte_hash_k64_cmp_eq((const char *) key1 + 64,
+                               (const char *) key2 + 64, key_len);
+}