DPDK 23.11.0
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rte_hash_crc.h
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1/* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
3 */
4
5#ifndef _RTE_HASH_CRC_H_
6#define _RTE_HASH_CRC_H_
7
14#ifdef __cplusplus
15extern "C" {
16#endif
17
18#include <stdint.h>
19
21#include <rte_common.h>
22#include <rte_config.h>
23#include <rte_cpuflags.h>
24#include <rte_log.h>
25
26#include "rte_crc_sw.h"
27
28#define CRC32_SW (1U << 0)
29#define CRC32_SSE42 (1U << 1)
30#define CRC32_x64 (1U << 2)
31#define CRC32_SSE42_x64 (CRC32_x64|CRC32_SSE42)
32#define CRC32_ARM64 (1U << 3)
33
34static uint8_t crc32_alg = CRC32_SW;
35
36#if defined(RTE_ARCH_ARM64) && defined(__ARM_FEATURE_CRC32)
37#include "rte_crc_arm64.h"
38#elif defined(RTE_ARCH_X86)
39#include "rte_crc_x86.h"
40#else
41#include "rte_crc_generic.h"
42#endif
43
55static inline void
57{
58 crc32_alg = CRC32_SW;
59
60 if (alg == CRC32_SW)
61 return;
62
63#if defined RTE_ARCH_X86
64 if (!(alg & CRC32_SSE42_x64))
65 RTE_LOG(WARNING, HASH,
66 "Unsupported CRC32 algorithm requested using CRC32_x64/CRC32_SSE42\n");
67 if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_EM64T) || alg == CRC32_SSE42)
68 crc32_alg = CRC32_SSE42;
69 else
70 crc32_alg = CRC32_SSE42_x64;
71#endif
72
73#if defined RTE_ARCH_ARM64
74 if (!(alg & CRC32_ARM64))
75 RTE_LOG(WARNING, HASH,
76 "Unsupported CRC32 algorithm requested using CRC32_ARM64\n");
77 if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_CRC32))
78 crc32_alg = CRC32_ARM64;
79#endif
80
81 if (crc32_alg == CRC32_SW)
82 RTE_LOG(WARNING, HASH,
83 "Unsupported CRC32 algorithm requested using CRC32_SW\n");
84}
85
86/* Setting the best available algorithm */
87RTE_INIT(rte_hash_crc_init_alg)
88{
89#if defined(RTE_ARCH_X86)
90 rte_hash_crc_set_alg(CRC32_SSE42_x64);
91#elif defined(RTE_ARCH_ARM64) && defined(__ARM_FEATURE_CRC32)
92 rte_hash_crc_set_alg(CRC32_ARM64);
93#else
94 rte_hash_crc_set_alg(CRC32_SW);
95#endif
96}
97
98#ifdef __DOXYGEN__
99
110static inline uint32_t
111rte_hash_crc_1byte(uint8_t data, uint32_t init_val);
112
123static inline uint32_t
124rte_hash_crc_2byte(uint16_t data, uint32_t init_val);
125
136static inline uint32_t
137rte_hash_crc_4byte(uint32_t data, uint32_t init_val);
138
149static inline uint32_t
150rte_hash_crc_8byte(uint64_t data, uint32_t init_val);
151
152#endif /* __DOXYGEN__ */
153
166static inline uint32_t
167rte_hash_crc(const void *data, uint32_t data_len, uint32_t init_val)
168{
169 unsigned i;
170 uintptr_t pd = (uintptr_t) data;
171
172 for (i = 0; i < data_len / 8; i++) {
173 init_val = rte_hash_crc_8byte(*(const uint64_t *)pd, init_val);
174 pd += 8;
175 }
176
177 if (data_len & 0x4) {
178 init_val = rte_hash_crc_4byte(*(const uint32_t *)pd, init_val);
179 pd += 4;
180 }
181
182 if (data_len & 0x2) {
183 init_val = rte_hash_crc_2byte(*(const uint16_t *)pd, init_val);
184 pd += 2;
185 }
186
187 if (data_len & 0x1)
188 init_val = rte_hash_crc_1byte(*(const uint8_t *)pd, init_val);
189
190 return init_val;
191}
192
193#ifdef __cplusplus
194}
195#endif
196
197#endif /* _RTE_HASH_CRC_H_ */
#define RTE_INIT(func)
Definition rte_common.h:243
__extension__ int rte_cpu_get_flag_enabled(enum rte_cpu_flag_t feature)
static uint32_t rte_hash_crc_4byte(uint32_t data, uint32_t init_val)
static uint32_t rte_hash_crc_1byte(uint8_t data, uint32_t init_val)
static void rte_hash_crc_set_alg(uint8_t alg)
static uint32_t rte_hash_crc(const void *data, uint32_t data_len, uint32_t init_val)
static uint32_t rte_hash_crc_2byte(uint16_t data, uint32_t init_val)
static uint32_t rte_hash_crc_8byte(uint64_t data, uint32_t init_val)
#define RTE_LOG(l, t,...)
Definition rte_log.h:331