DPDK  22.11.0
Functions
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
algAn 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 57 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
dataData to perform hash on.
init_valValue 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
dataData to perform hash on.
init_valValue 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
dataData to perform hash on.
init_valValue 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
dataData to perform hash on.
init_valValue 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
dataData to perform hash on.
data_lenHow many bytes to use to calculate hash value.
init_valValue to initialise hash generator.
Returns
32bit calculated hash value.

Definition at line 168 of file rte_hash_crc.h.