rte_hash_crc.h File Reference

#include <stdint.h>
#include <rte_branch_prediction.h>
#include <rte_common.h>
#include <rte_config.h>
#include <rte_cpuflags.h>
#include <rte_log.h>
#include "rte_crc_sw.h"
#include "rte_crc_generic.h"

Go to the source code of this file.

Functions
static void	rte_hash_crc_set_alg (uint8_t alg)
static uint32_t	rte_hash_crc_1byte (uint8_t data, uint32_t init_val)
static uint32_t	rte_hash_crc_2byte (uint16_t data, uint32_t init_val)
static uint32_t	rte_hash_crc_4byte (uint32_t data, uint32_t init_val)
static uint32_t	rte_hash_crc_8byte (uint64_t data, uint32_t init_val)
static uint32_t	rte_hash_crc (const void *data, uint32_t data_len, uint32_t init_val)

Detailed Description

RTE CRC Hash

Definition in file rte_hash_crc.h.

Function Documentation

rte_hash_crc_set_alg()

static void rte_hash_crc_set_alg ( uint8_t  alg )

inlinestatic

Allow or disallow use of SSE4.2/ARMv8 intrinsics for CRC32 hash calculation.

Parameters

alg	An OR of following flags: (CRC32_SW) Don't use SSE4.2/ARMv8 intrinsics (default non-[x86/ARMv8]) (CRC32_SSE42) Use SSE4.2 intrinsics if available (CRC32_SSE42_x64) Use 64-bit SSE4.2 intrinsic if available (default x86) (CRC32_ARM64) Use ARMv8 CRC intrinsic if available (default ARMv8)

Definition at line 56 of file rte_hash_crc.h.

rte_hash_crc_1byte()

static uint32_t rte_hash_crc_1byte ( uint8_t  data, uint32_t  init_val  )

inlinestatic

Use single CRC32 instruction to perform a hash on a byte value.

Parameters

data	Data to perform hash on.
init_val	Value to initialise hash generator.

Returns

32bit calculated hash value.

rte_hash_crc_2byte()

static uint32_t rte_hash_crc_2byte ( uint16_t  data, uint32_t  init_val  )

inlinestatic

Use single CRC32 instruction to perform a hash on a 2 bytes value.

Parameters

data	Data to perform hash on.
init_val	Value to initialise hash generator.

Returns

32bit calculated hash value.

rte_hash_crc_4byte()

static uint32_t rte_hash_crc_4byte ( uint32_t  data, uint32_t  init_val  )

inlinestatic

Use single CRC32 instruction to perform a hash on a 4 bytes value.

Parameters

data	Data to perform hash on.
init_val	Value to initialise hash generator.

Returns

32bit calculated hash value.

Examples:

examples/l3fwd/l3fwd_em.c.

rte_hash_crc_8byte()

static uint32_t rte_hash_crc_8byte ( uint64_t  data, uint32_t  init_val  )

inlinestatic

Use single CRC32 instruction to perform a hash on a 8 bytes value.

Parameters

data	Data to perform hash on.
init_val	Value to initialise hash generator.

Returns

32bit calculated hash value.

rte_hash_crc()

static uint32_t rte_hash_crc ( const void *  data, uint32_t  data_len, uint32_t  init_val  )

inlinestatic

Calculate CRC32 hash on user-supplied byte array.

Parameters

data	Data to perform hash on.
data_len	How many bytes to use to calculate hash value.
init_val	Value to initialise hash generator.

Returns

32bit calculated hash value.

Definition at line 167 of file rte_hash_crc.h.