NAME

       rte_hash_crc.h

SYNOPSIS

       #include <stdint.h>
       #include <rte_branch_prediction.h>
       #include <rte_common.h>
       #include <rte_config.h>
       #include 'rte_crc_sw.h'
       #include 'rte_crc_generic.h'

   Functions
       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

   void rte_hash_crc_set_alg (uint8_t alg)
       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)

   static uint32_t rte_hash_crc_1byte (uint8_t data, uint32_t init_val) [inline],  [static]
       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.

   static uint32_t rte_hash_crc_2byte (uint16_t data, uint32_t init_val) [inline],  [static]
       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.

   static uint32_t rte_hash_crc_4byte (uint32_t data, uint32_t init_val) [inline],  [static]
       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.

   static uint32_t rte_hash_crc_8byte (uint64_t data, uint32_t init_val) [inline],  [static]
       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.

   static uint32_t rte_hash_crc (const void * data, uint32_t data_len, uint32_t init_val) [inline],  [static]
       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 125 of file rte_hash_crc.h.

Author

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DPDK                                             Version 24.11.2                               rte_hash_crc.h(3)