[v2,1/3] lib/librte_table: add hash_func header files

  This commit adds rte_table_hash_func.h and rte_table_hash_func_arm64.h to
librte_table. This will replace hash_func.h and hash_func_arm64.h in the IP
Pipeline application and in SoftNIC. This also adds a scalar implementation
of the x86_64 intrinsic for crc32 as a generic fallback.

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>

---
v2:
   - Fixed typo in commit message
   - Fixed typo in arm header that caused some compilations to fail for the
     entire patchset
---
 lib/librte_table/Makefile                    |   2 +
 lib/librte_table/meson.build                 |   2 +
 lib/librte_table/rte_table_hash_func.h       | 244 +++++++++++++++++++++++++++
 lib/librte_table/rte_table_hash_func_arm64.h |  21 +++
 lib/librte_table/rte_table_version.map       |  14 ++
 5 files changed, 283 insertions(+)
 create mode 100644 lib/librte_table/rte_table_hash_func.h
 create mode 100644 lib/librte_table/rte_table_hash_func_arm64.h
  

The code looks good, some comments to the commit message.

> -----Original Message-----
> From: Kevin Laatz <kevin.laatz@intel.com>
> Sent: Friday, September 7, 2018 4:05 PM
> To: dev@dpdk.org
> Cc: cristian.dumitrescu@intel.com; Jianbo Liu <Jianbo.Liu@arm.com>; Gavin
> Hu (Arm Technology China) <Gavin.Hu@arm.com>;
> jerin.jacob@caviumnetworks.com; Kevin Laatz <kevin.laatz@intel.com>
> Subject: [PATCH v2 1/3] lib/librte_table: add hash_func header files
>
> This commit adds rte_table_hash_func.h and rte_table_hash_func_arm64.h
> to librte_table. This will replace hash_func.h and hash_func_arm64.h in the
> IP Pipeline application and in SoftNIC. This also adds a scalar implementation
> of the x86_64 intrinsic for crc32 as a generic fallback.
It is better to mention this patch reduces code duplication by removing duplicate headers files
Within two folders and consolidating them into a single one.
>
> Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
> Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Acked-by: Gavin Hu <gavin.hu@arm.com>
> ---
> v2:
>    - Fixed typo in commit message
>    - Fixed typo in arm header that caused some compilations to fail for the
>      entire patchset
> ---
>  lib/librte_table/Makefile                    |   2 +
>  lib/librte_table/meson.build                 |   2 +
>  lib/librte_table/rte_table_hash_func.h       | 244
> +++++++++++++++++++++++++++
>  lib/librte_table/rte_table_hash_func_arm64.h |  21 +++
>  lib/librte_table/rte_table_version.map       |  14 ++
>  5 files changed, 283 insertions(+)
>  create mode 100644 lib/librte_table/rte_table_hash_func.h
>  create mode 100644 lib/librte_table/rte_table_hash_func_arm64.h
>
> diff --git a/lib/librte_table/Makefile b/lib/librte_table/Makefile index
> 276d476..f935678 100644
> --- a/lib/librte_table/Makefile
> +++ b/lib/librte_table/Makefile
> @@ -46,6 +46,8 @@ SYMLINK-$(CONFIG_RTE_LIBRTE_TABLE)-include +=
> rte_table_acl.h  endif  SYMLINK-$(CONFIG_RTE_LIBRTE_TABLE)-include +=
> rte_table_hash.h  SYMLINK-$(CONFIG_RTE_LIBRTE_TABLE)-include +=
> rte_table_hash_cuckoo.h
> +SYMLINK-$(CONFIG_RTE_LIBRTE_TABLE)-include += rte_table_hash_func.h
> +SYMLINK-$(CONFIG_RTE_LIBRTE_TABLE)-include +=
> +rte_table_hash_func_arm64.h
>  SYMLINK-$(CONFIG_RTE_LIBRTE_TABLE)-include += rte_lru.h  ifeq
> ($(CONFIG_RTE_ARCH_X86),y)  SYMLINK-$(CONFIG_RTE_LIBRTE_TABLE)-
> include += rte_lru_x86.h diff --git a/lib/librte_table/meson.build
> b/lib/librte_table/meson.build index 8b2f841..6ae3cd6 100644
> --- a/lib/librte_table/meson.build
> +++ b/lib/librte_table/meson.build
> @@ -19,6 +19,8 @@ headers = files('rte_table.h',
>  'rte_table_lpm_ipv6.h',
>  'rte_table_hash.h',
>  'rte_table_hash_cuckoo.h',
> +'rte_table_hash_func.h',
> +'rte_table_hash_func_arm64.h',
>  'rte_lru.h',
>  'rte_table_array.h',
>  'rte_table_stub.h')
> diff --git a/lib/librte_table/rte_table_hash_func.h
> b/lib/librte_table/rte_table_hash_func.h
> new file mode 100644
> index 0000000..4eadbfb
> --- /dev/null
> +++ b/lib/librte_table/rte_table_hash_func.h
> @@ -0,0 +1,244 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright(c) 2010-2018 Intel Corporation  */
> +
> +#ifndef __INCLUDE_RTE_TABLE_HASH_FUNC_H__ #define
> +__INCLUDE_RTE_TABLE_HASH_FUNC_H__
> +
> +#ifdef __cplusplus
> +extern "C" {
> +#endif
> +
> +#include <stdint.h>
> +
> +#include <rte_common.h>
> +
> +static inline uint64_t
> +rte_crc32_u64_generic(uint64_t crc, uint64_t value) {
> +int i;
> +
> +crc = (crc & 0xFFFFFFFFLLU) ^ value;
> +for (i = 63; i >= 0; i--) {
> +uint64_t mask;
> +
> +mask = -(crc & 1LLU);
> +crc = (crc >> 1LLU) ^ (0x82F63B78LLU & mask);
> +}
> +
> +return crc;
> +}
> +
> +#if defined(RTE_ARCH_X86_64)
> +
> +#include <x86intrin.h>
> +
> +static inline uint64_t
> +rte_crc32_u64(uint64_t crc, uint64_t v) {
> +return _mm_crc32_u64(crc, v);
> +}
> +
> +#elif defined(RTE_ARCH_ARM64)
> +#include "rte_table_hash_func_arm64.h"
> +#else
> +
> +static inline uin64_t
> +rte_crc32_u64(uint64_t crc, uint64_t v) {
> +return rte_crc32_u64_generic(crc, v);
> +}
> +
> +#endif
> +
> +static inline uint64_t
> +rte_table_hash_crc_key8(void *key, void *mask, __rte_unused uint32_t
> key_size,
> +uint64_t seed)
> +{
> +uint64_t *k = key;
> +uint64_t *m = mask;
> +uint64_t crc0;
> +
> +crc0 = rte_crc32_u64(seed, k[0] & m[0]);
> +
> +return crc0;
> +}
> +
> +static inline uint64_t
> +rte_table_hash_crc_key16(void *key, void *mask, __rte_unused uint32_t
> key_size,
> +uint64_t seed)
> +{
> +uint64_t *k = key;
> +uint64_t *m = mask;
> +uint64_t k0, crc0, crc1;
> +
> +k0 = k[0] & m[0];
> +
> +crc0 = rte_crc32_u64(k0, seed);
> +crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
> +
> +crc0 ^= crc1;
> +
> +return crc0;
> +}
> +
> +static inline uint64_t
> +rte_table_hash_crc_key24(void *key, void *mask, __rte_unused uint32_t
> key_size,
> +uint64_t seed)
> +{
> +uint64_t *k = key;
> +uint64_t *m = mask;
> +uint64_t k0, k2, crc0, crc1;
> +
> +k0 = k[0] & m[0];
> +k2 = k[2] & m[2];
> +
> +crc0 = rte_crc32_u64(k0, seed);
> +crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
> +
> +crc0 = rte_crc32_u64(crc0, k2);
> +
> +crc0 ^= crc1;
> +
> +return crc0;
> +}
> +
> +static inline uint64_t
> +rte_table_hash_crc_key32(void *key, void *mask, __rte_unused uint32_t
> key_size,
> +uint64_t seed)
> +{
> +uint64_t *k = key;
> +uint64_t *m = mask;
> +uint64_t k0, k2, crc0, crc1, crc2, crc3;
> +
> +k0 = k[0] & m[0];
> +k2 = k[2] & m[2];
> +
> +crc0 = rte_crc32_u64(k0, seed);
> +crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
> +
> +crc2 = rte_crc32_u64(k2, k[3] & m[3]);
> +crc3 = k2 >> 32;
> +
> +crc0 = rte_crc32_u64(crc0, crc1);
> +crc1 = rte_crc32_u64(crc2, crc3);
> +
> +crc0 ^= crc1;
> +
> +return crc0;
> +}
> +
> +static inline uint64_t
> +rte_table_hash_crc_key40(void *key, void *mask, __rte_unused uint32_t
> key_size,
> +uint64_t seed)
> +{
> +uint64_t *k = key;
> +uint64_t *m = mask;
> +uint64_t k0, k2, crc0, crc1, crc2, crc3;
> +
> +k0 = k[0] & m[0];
> +k2 = k[2] & m[2];
> +
> +crc0 = rte_crc32_u64(k0, seed);
> +crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
> +
> +crc2 = rte_crc32_u64(k2, k[3] & m[3]);
> +crc3 = rte_crc32_u64(k2 >> 32, k[4] & m[4]);
> +
> +crc0 = rte_crc32_u64(crc0, crc1);
> +crc1 = rte_crc32_u64(crc2, crc3);
> +
> +crc0 ^= crc1;
> +
> +return crc0;
> +}
> +
> +static inline uint64_t
> +rte_table_hash_crc_key48(void *key, void *mask, __rte_unused uint32_t
> key_size,
> +uint64_t seed)
> +{
> +uint64_t *k = key;
> +uint64_t *m = mask;
> +uint64_t k0, k2, k5, crc0, crc1, crc2, crc3;
> +
> +k0 = k[0] & m[0];
> +k2 = k[2] & m[2];
> +k5 = k[5] & m[5];
> +
> +crc0 = rte_crc32_u64(k0, seed);
> +crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
> +
> +crc2 = rte_crc32_u64(k2, k[3] & m[3]);
> +crc3 = rte_crc32_u64(k2 >> 32, k[4] & m[4]);
> +
> +crc0 = rte_crc32_u64(crc0, (crc1 << 32) ^ crc2);
> +crc1 = rte_crc32_u64(crc3, k5);
> +
> +crc0 ^= crc1;
> +
> +return crc0;
> +}
> +
> +static inline uint64_t
> +rte_table_hash_crc_key56(void *key, void *mask, __rte_unused uint32_t
> key_size,
> +uint64_t seed)
> +{
> +uint64_t *k = key;
> +uint64_t *m = mask;
> +uint64_t k0, k2, k5, crc0, crc1, crc2, crc3, crc4, crc5;
> +
> +k0 = k[0] & m[0];
> +k2 = k[2] & m[2];
> +k5 = k[5] & m[5];
> +
> +crc0 = rte_crc32_u64(k0, seed);
> +crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
> +
> +crc2 = rte_crc32_u64(k2, k[3] & m[3]);
> +crc3 = rte_crc32_u64(k2 >> 32, k[4] & m[4]);
> +
> +crc4 = rte_crc32_u64(k5, k[6] & m[6]);
> +crc5 = k5 >> 32;
> +
> +crc0 = rte_crc32_u64(crc0, (crc1 << 32) ^ crc2);
> +crc1 = rte_crc32_u64(crc3, (crc4 << 32) ^ crc5);
> +
> +crc0 ^= crc1;
> +
> +return crc0;
> +}
> +
> +static inline uint64_t
> +rte_table_hash_crc_key64(void *key, void *mask, __rte_unused uint32_t
> key_size,
> +uint64_t seed)
> +{
> +uint64_t *k = key;
> +uint64_t *m = mask;
> +uint64_t k0, k2, k5, crc0, crc1, crc2, crc3, crc4, crc5;
> +
> +k0 = k[0] & m[0];
> +k2 = k[2] & m[2];
> +k5 = k[5] & m[5];
> +
> +crc0 = rte_crc32_u64(k0, seed);
> +crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);
> +
> +crc2 = rte_crc32_u64(k2, k[3] & m[3]);
> +crc3 = rte_crc32_u64(k2 >> 32, k[4] & m[4]);
> +
> +crc4 = rte_crc32_u64(k5, k[6] & m[6]);
> +crc5 = rte_crc32_u64(k5 >> 32, k[7] & m[7]);
> +
> +crc0 = rte_crc32_u64(crc0, (crc1 << 32) ^ crc2);
> +crc1 = rte_crc32_u64(crc3, (crc4 << 32) ^ crc5);
> +
> +crc0 ^= crc1;
> +
> +return crc0;
> +}
> +
> +#ifdef __cplusplus
> +}
> +#endif
> +
> +#endif
> diff --git a/lib/librte_table/rte_table_hash_func_arm64.h
> b/lib/librte_table/rte_table_hash_func_arm64.h
> new file mode 100644
> index 0000000..eb04c1f
> --- /dev/null
> +++ b/lib/librte_table/rte_table_hash_func_arm64.h
> @@ -0,0 +1,21 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright(c) 2017-2018 Linaro Limited  */
> +
> +#ifndef __INCLUDE_RTE_TABLE_HASH_FUNC_ARM64_H__
> +#define __INCLUDE_RTE_TABLE_HASH_FUNC_ARM64_H__
> +
> +#define _CRC32CX(crc, val)\
> +__asm__("crc32cx %w[c], %w[c], %x[v]":[c] "+r" (crc):[v] "r" (val))
> +
> +static inline uint64_t
> +rte_crc32_u64(uint64_t crc, uint64_t v) {
> +uint32_t crc32 = crc;
> +
> +_CRC32CX(crc32, v);
> +
> +return crc32;
> +}
> +
> +#endif
> diff --git a/lib/librte_table/rte_table_version.map
> b/lib/librte_table/rte_table_version.map
> index 6237252..dab339e 100644
> --- a/lib/librte_table/rte_table_version.map
> +++ b/lib/librte_table/rte_table_version.map
> @@ -18,3 +18,17 @@ DPDK_17.11 {
>
>  local: *;
>  };
> +
> +DPDK_18.11 {
> +global:
> +
> +rte_crc32_u64_generic;
> +rte_table_hash_crc_key8;
> +rte_table_hash_crc_key16;
> +rte_table_hash_crc_key24;
> +rte_table_hash_crc_key32;
> +rte_table_hash_crc_key40;
> +rte_table_hash_crc_key48;
> +rte_table_hash_crc_key56;
> +rte_table_hash_crc_key64;
> +} DPDK_17.11;
> --
> 2.9.5

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