f80ae1aa9a
Merge CRC32 hash calculation public API implementation for x86 and Arm. Select the best available CRC32 algorithm when unsupported algorithm on a given CPU architecture is requested by an application. Previously, if an application directly includes `rte_crc_arm64.h` without including `rte_hash_crc.h` it will fail to compile. Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com> Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2015 Cavium, Inc
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*/
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#ifndef _RTE_CRC_ARM64_H_
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#define _RTE_CRC_ARM64_H_
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static inline uint32_t
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crc32c_arm64_u8(uint8_t data, uint32_t init_val)
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{
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__asm__ volatile(
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"crc32cb %w[crc], %w[crc], %w[value]"
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: [crc] "+r" (init_val)
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: [value] "r" (data));
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return init_val;
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}
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static inline uint32_t
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crc32c_arm64_u16(uint16_t data, uint32_t init_val)
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{
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__asm__ volatile(
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"crc32ch %w[crc], %w[crc], %w[value]"
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: [crc] "+r" (init_val)
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: [value] "r" (data));
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return init_val;
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}
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static inline uint32_t
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crc32c_arm64_u32(uint32_t data, uint32_t init_val)
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{
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__asm__ volatile(
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"crc32cw %w[crc], %w[crc], %w[value]"
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: [crc] "+r" (init_val)
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: [value] "r" (data));
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return init_val;
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}
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static inline uint32_t
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crc32c_arm64_u64(uint64_t data, uint32_t init_val)
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{
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__asm__ volatile(
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"crc32cx %w[crc], %w[crc], %x[value]"
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: [crc] "+r" (init_val)
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: [value] "r" (data));
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return init_val;
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}
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/*
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* Use single crc32 instruction to perform a hash on a byte value.
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* Fall back to software crc32 implementation in case ARM CRC is
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* not supported.
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*/
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static inline uint32_t
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rte_hash_crc_1byte(uint8_t data, uint32_t init_val)
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{
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if (likely(crc32_alg & CRC32_ARM64))
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return crc32c_arm64_u8(data, init_val);
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return crc32c_1byte(data, init_val);
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}
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/*
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* Use single crc32 instruction to perform a hash on a 2 bytes value.
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* Fall back to software crc32 implementation in case ARM CRC is
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* not supported.
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*/
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static inline uint32_t
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rte_hash_crc_2byte(uint16_t data, uint32_t init_val)
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{
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if (likely(crc32_alg & CRC32_ARM64))
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return crc32c_arm64_u16(data, init_val);
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return crc32c_2bytes(data, init_val);
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}
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/*
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* Use single crc32 instruction to perform a hash on a 4 byte value.
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* Fall back to software crc32 implementation in case ARM CRC is
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* not supported.
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*/
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static inline uint32_t
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rte_hash_crc_4byte(uint32_t data, uint32_t init_val)
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{
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if (likely(crc32_alg & CRC32_ARM64))
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return crc32c_arm64_u32(data, init_val);
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return crc32c_1word(data, init_val);
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}
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/*
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* Use single crc32 instruction to perform a hash on a 8 byte value.
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* Fall back to software crc32 implementation in case ARM CRC is
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* not supported.
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*/
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static inline uint32_t
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rte_hash_crc_8byte(uint64_t data, uint32_t init_val)
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{
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if (likely(crc32_alg & CRC32_ARM64))
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return crc32c_arm64_u64(data, init_val);
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return crc32c_2words(data, init_val);
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}
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#endif /* _RTE_CRC_ARM64_H_ */
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