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authorKevin Laatz <kevin.laatz@intel.com>2018-09-25 16:32:28 +0100
committerCristian Dumitrescu <cristian.dumitrescu@intel.com>2018-10-12 17:58:53 +0200
commitea7be0a0386e1bc2cd0686aedd27c034f54fed53 (patch)
tree0bfd0112e5649e2b370beaff5ad87fed40cdd47d /lib/librte_table/rte_table_hash_func.h
parent44cad685eee345e413497da327a33a9ef2af4c53 (diff)
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lib/librte_table: add hash function headers
This commit adds rte_table_hash_func.h and rte_table_hash_func_arm64.h to librte_table. This reduces code duplication by removing duplicate header files within two folders and consolidating them into a single one. This also adds a scalar implementation of the x86_64 intrinsic for crc32 as a generic fallback. Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com> Signed-off-by: Kevin Laatz <kevin.laatz@intel.com> Acked-by: Gavin Hu <gavin.hu@arm.com> Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Diffstat (limited to 'lib/librte_table/rte_table_hash_func.h')
-rw-r--r--lib/librte_table/rte_table_hash_func.h245
1 files changed, 245 insertions, 0 deletions
diff --git a/lib/librte_table/rte_table_hash_func.h b/lib/librte_table/rte_table_hash_func.h
new file mode 100644
index 0000000..02296ea
--- /dev/null
+++ b/lib/librte_table/rte_table_hash_func.h
@@ -0,0 +1,245 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2018 Intel Corporation
+ */
+
+#ifndef __INCLUDE_RTE_TABLE_HASH_FUNC_H__
+#define __INCLUDE_RTE_TABLE_HASH_FUNC_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+#include <rte_compat.h>
+#include <rte_common.h>
+
+static inline uint64_t __rte_experimental
+rte_crc32_u64_generic(uint64_t crc, uint64_t value)
+{
+ int i;
+
+ crc = (crc & 0xFFFFFFFFLLU) ^ value;
+ for (i = 63; i >= 0; i--) {
+ uint64_t mask;
+
+ mask = -(crc & 1LLU);
+ crc = (crc >> 1LLU) ^ (0x82F63B78LLU & mask);
+ }
+
+ return crc;
+}
+
+#if defined(RTE_ARCH_X86_64)
+
+#include <x86intrin.h>
+
+static inline uint64_t
+rte_crc32_u64(uint64_t crc, uint64_t v)
+{
+ return _mm_crc32_u64(crc, v);
+}
+
+#elif defined(RTE_ARCH_ARM64)
+#include "rte_table_hash_func_arm64.h"
+#else
+
+static inline uint64_t
+rte_crc32_u64(uint64_t crc, uint64_t v)
+{
+ return rte_crc32_u64_generic(crc, v);
+}
+
+#endif
+
+static inline uint64_t __rte_experimental
+rte_table_hash_crc_key8(void *key, void *mask, __rte_unused uint32_t key_size,
+ uint64_t seed)
+{
+ uint64_t *k = key;
+ uint64_t *m = mask;
+ uint64_t crc0;
+
+ crc0 = rte_crc32_u64(seed, k[0] & m[0]);
+
+ return crc0;
+}
+
+static inline uint64_t __rte_experimental
+rte_table_hash_crc_key16(void *key, void *mask, __rte_unused uint32_t key_size,
+ uint64_t seed)
+{
+ uint64_t *k = key;
+ uint64_t *m = mask;
+ uint64_t k0, crc0, crc1;
+
+ k0 = k[0] & m[0];
+
+ crc0 = rte_crc32_u64(k0, seed);
+ crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
+
+ crc0 ^= crc1;
+
+ return crc0;
+}
+
+static inline uint64_t __rte_experimental
+rte_table_hash_crc_key24(void *key, void *mask, __rte_unused uint32_t key_size,
+ uint64_t seed)
+{
+ uint64_t *k = key;
+ uint64_t *m = mask;
+ uint64_t k0, k2, crc0, crc1;
+
+ k0 = k[0] & m[0];
+ k2 = k[2] & m[2];
+
+ crc0 = rte_crc32_u64(k0, seed);
+ crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
+
+ crc0 = rte_crc32_u64(crc0, k2);
+
+ crc0 ^= crc1;
+
+ return crc0;
+}
+
+static inline uint64_t __rte_experimental
+rte_table_hash_crc_key32(void *key, void *mask, __rte_unused uint32_t key_size,
+ uint64_t seed)
+{
+ uint64_t *k = key;
+ uint64_t *m = mask;
+ uint64_t k0, k2, crc0, crc1, crc2, crc3;
+
+ k0 = k[0] & m[0];
+ k2 = k[2] & m[2];
+
+ crc0 = rte_crc32_u64(k0, seed);
+ crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
+
+ crc2 = rte_crc32_u64(k2, k[3] & m[3]);
+ crc3 = k2 >> 32;
+
+ crc0 = rte_crc32_u64(crc0, crc1);
+ crc1 = rte_crc32_u64(crc2, crc3);
+
+ crc0 ^= crc1;
+
+ return crc0;
+}
+
+static inline uint64_t __rte_experimental
+rte_table_hash_crc_key40(void *key, void *mask, __rte_unused uint32_t key_size,
+ uint64_t seed)
+{
+ uint64_t *k = key;
+ uint64_t *m = mask;
+ uint64_t k0, k2, crc0, crc1, crc2, crc3;
+
+ k0 = k[0] & m[0];
+ k2 = k[2] & m[2];
+
+ crc0 = rte_crc32_u64(k0, seed);
+ crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
+
+ crc2 = rte_crc32_u64(k2, k[3] & m[3]);
+ crc3 = rte_crc32_u64(k2 >> 32, k[4] & m[4]);
+
+ crc0 = rte_crc32_u64(crc0, crc1);
+ crc1 = rte_crc32_u64(crc2, crc3);
+
+ crc0 ^= crc1;
+
+ return crc0;
+}
+
+static inline uint64_t __rte_experimental
+rte_table_hash_crc_key48(void *key, void *mask, __rte_unused uint32_t key_size,
+ uint64_t seed)
+{
+ uint64_t *k = key;
+ uint64_t *m = mask;
+ uint64_t k0, k2, k5, crc0, crc1, crc2, crc3;
+
+ k0 = k[0] & m[0];
+ k2 = k[2] & m[2];
+ k5 = k[5] & m[5];
+
+ crc0 = rte_crc32_u64(k0, seed);
+ crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
+
+ crc2 = rte_crc32_u64(k2, k[3] & m[3]);
+ crc3 = rte_crc32_u64(k2 >> 32, k[4] & m[4]);
+
+ crc0 = rte_crc32_u64(crc0, (crc1 << 32) ^ crc2);
+ crc1 = rte_crc32_u64(crc3, k5);
+
+ crc0 ^= crc1;
+
+ return crc0;
+}
+
+static inline uint64_t __rte_experimental
+rte_table_hash_crc_key56(void *key, void *mask, __rte_unused uint32_t key_size,
+ uint64_t seed)
+{
+ uint64_t *k = key;
+ uint64_t *m = mask;
+ uint64_t k0, k2, k5, crc0, crc1, crc2, crc3, crc4, crc5;
+
+ k0 = k[0] & m[0];
+ k2 = k[2] & m[2];
+ k5 = k[5] & m[5];
+
+ crc0 = rte_crc32_u64(k0, seed);
+ crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
+
+ crc2 = rte_crc32_u64(k2, k[3] & m[3]);
+ crc3 = rte_crc32_u64(k2 >> 32, k[4] & m[4]);
+
+ crc4 = rte_crc32_u64(k5, k[6] & m[6]);
+ crc5 = k5 >> 32;
+
+ crc0 = rte_crc32_u64(crc0, (crc1 << 32) ^ crc2);
+ crc1 = rte_crc32_u64(crc3, (crc4 << 32) ^ crc5);
+
+ crc0 ^= crc1;
+
+ return crc0;
+}
+
+static inline uint64_t __rte_experimental
+rte_table_hash_crc_key64(void *key, void *mask, __rte_unused uint32_t key_size,
+ uint64_t seed)
+{
+ uint64_t *k = key;
+ uint64_t *m = mask;
+ uint64_t k0, k2, k5, crc0, crc1, crc2, crc3, crc4, crc5;
+
+ k0 = k[0] & m[0];
+ k2 = k[2] & m[2];
+ k5 = k[5] & m[5];
+
+ crc0 = rte_crc32_u64(k0, seed);
+ crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
+
+ crc2 = rte_crc32_u64(k2, k[3] & m[3]);
+ crc3 = rte_crc32_u64(k2 >> 32, k[4] & m[4]);
+
+ crc4 = rte_crc32_u64(k5, k[6] & m[6]);
+ crc5 = rte_crc32_u64(k5 >> 32, k[7] & m[7]);
+
+ crc0 = rte_crc32_u64(crc0, (crc1 << 32) ^ crc2);
+ crc1 = rte_crc32_u64(crc3, (crc4 << 32) ^ crc5);
+
+ crc0 ^= crc1;
+
+ return crc0;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif