diff options
Diffstat (limited to 'src/dpdk22/lib/librte_hash/rte_crc_arm64.h')
-rw-r--r-- | src/dpdk22/lib/librte_hash/rte_crc_arm64.h | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/src/dpdk22/lib/librte_hash/rte_crc_arm64.h b/src/dpdk22/lib/librte_hash/rte_crc_arm64.h deleted file mode 100644 index 02e26bca..00000000 --- a/src/dpdk22/lib/librte_hash/rte_crc_arm64.h +++ /dev/null @@ -1,151 +0,0 @@ -/*- - * BSD LICENSE - * - * Copyright(c) 2015 Cavium networks. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Cavium networks nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef _RTE_CRC_ARM64_H_ -#define _RTE_CRC_ARM64_H_ - -/** - * @file - * - * RTE CRC arm64 Hash - */ - -#ifdef __cplusplus -extern "C" { -#endif - -#include <stdint.h> -#include <rte_cpuflags.h> -#include <rte_branch_prediction.h> -#include <rte_common.h> - -static inline uint32_t -crc32c_arm64_u32(uint32_t data, uint32_t init_val) -{ - asm(".arch armv8-a+crc"); - __asm__ volatile( - "crc32cw %w[crc], %w[crc], %w[value]" - : [crc] "+r" (init_val) - : [value] "r" (data)); - return init_val; -} - -static inline uint32_t -crc32c_arm64_u64(uint64_t data, uint32_t init_val) -{ - asm(".arch armv8-a+crc"); - __asm__ volatile( - "crc32cx %w[crc], %w[crc], %x[value]" - : [crc] "+r" (init_val) - : [value] "r" (data)); - return init_val; -} - -/** - * Allow or disallow use of arm64 SIMD instrinsics for CRC32 hash - * calculation. - * - * @param alg - * An OR of following flags: - * - (CRC32_SW) Don't use arm64 crc intrinsics - * - (CRC32_ARM64) Use ARMv8 CRC intrinsic if available - * - */ -static inline void -rte_hash_crc_set_alg(uint8_t alg) -{ - switch (alg) { - case CRC32_ARM64: - if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_CRC32)) - alg = CRC32_SW; - case CRC32_SW: - crc32_alg = alg; - default: - break; - } -} - -/* Setting the best available algorithm */ -static inline void __attribute__((constructor)) -rte_hash_crc_init_alg(void) -{ - rte_hash_crc_set_alg(CRC32_ARM64); -} - -/** - * Use single crc32 instruction to perform a hash on a 4 byte value. - * Fall back to software crc32 implementation in case arm64 crc intrinsics is - * not supported - * - * @param data - * Data to perform hash on. - * @param init_val - * Value to initialise hash generator. - * @return - * 32bit calculated hash value. - */ -static inline uint32_t -rte_hash_crc_4byte(uint32_t data, uint32_t init_val) -{ - if (likely(crc32_alg & CRC32_ARM64)) - return crc32c_arm64_u32(data, init_val); - - return crc32c_1word(data, init_val); -} - -/** - * Use single crc32 instruction to perform a hash on a 8 byte value. - * Fall back to software crc32 implementation in case arm64 crc intrinsics is - * not supported - * - * @param data - * Data to perform hash on. - * @param init_val - * Value to initialise hash generator. - * @return - * 32bit calculated hash value. - */ -static inline uint32_t -rte_hash_crc_8byte(uint64_t data, uint32_t init_val) -{ - if (likely(crc32_alg == CRC32_ARM64)) - return crc32c_arm64_u64(data, init_val); - - return crc32c_2words(data, init_val); -} - -#ifdef __cplusplus -} -#endif - -#endif /* _RTE_CRC_ARM64_H_ */ |