hash: fix thash gfni implementation

  This patch replaces _mm512_set_epi8 with _mm512_set_epi32
due to the lack of support by some compilers.
Also this patch checks if AVX512F is supported along with GFNI.
This is done if the code is built on a platform that supports GFNI,
but does not support AVX512.

Fixes: 4fd8c4cb0de1 ("hash: add new Toeplitz hash implementation")
Cc: vladimir.medvedkin@intel.com

Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
---
 lib/hash/rte_thash_x86_gfni.h | 31 +++++++++++++------------------
 1 file changed, 13 insertions(+), 18 deletions(-)
  

On Tue, Nov 9, 2021 at 12:25 PM Vladimir Medvedkin
<vladimir.medvedkin@intel.com> wrote:
>
> This patch replaces _mm512_set_epi8 with _mm512_set_epi32
> due to the lack of support by some compilers.
> Also this patch checks if AVX512F is supported along with GFNI.
> This is done if the code is built on a platform that supports GFNI,
> but does not support AVX512.
>
> Fixes: 4fd8c4cb0de1 ("hash: add new Toeplitz hash implementation")
> Cc: vladimir.medvedkin@intel.com
>
> Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
> ---
>  lib/hash/rte_thash_x86_gfni.h | 31 +++++++++++++------------------
>  1 file changed, 13 insertions(+), 18 deletions(-)
>
> diff --git a/lib/hash/rte_thash_x86_gfni.h b/lib/hash/rte_thash_x86_gfni.h
> index c2889c3734..7afbbedc08 100644
> --- a/lib/hash/rte_thash_x86_gfni.h
> +++ b/lib/hash/rte_thash_x86_gfni.h
> @@ -18,7 +18,7 @@
>  extern "C" {
>  #endif
>
> -#ifdef __GFNI__
> +#if defined(__GFNI__) && defined(__AVX512F__)
>  #define RTE_THASH_GFNI_DEFINED
>
>  #define RTE_THASH_FIRST_ITER_MSK       0x0f0f0f0f0f0e0c08
> @@ -56,23 +56,18 @@ static inline __m512i
>  __rte_thash_gfni(const uint64_t *mtrx, const uint8_t *tuple,
>         const uint8_t *secondary_tuple, int len)
>  {
> -       __m512i permute_idx = _mm512_set_epi8(7, 6, 5, 4, 7, 6, 5, 4,
> -                                               6, 5, 4, 3, 6, 5, 4, 3,
> -                                               5, 4, 3, 2, 5, 4, 3, 2,
> -                                               4, 3, 2, 1, 4, 3, 2, 1,
> -                                               3, 2, 1, 0, 3, 2, 1, 0,
> -                                               2, 1, 0, -1, 2, 1, 0, -1,
> -                                               1, 0, -1, -2, 1, 0, -1, -2,
> -                                               0, -1, -2, -3, 0, -1, -2, -3);
> -
> -       const __m512i rewind_idx = _mm512_set_epi8(0, 0, 0, 0, 0, 0, 0, 0,
> -                                               0, 0, 0, 0, 0, 0, 0, 0,
> -                                               0, 0, 0, 0, 0, 0, 0, 0,
> -                                               0, 0, 0, 0, 0, 0, 0, 0,
> -                                               0, 0, 0, 0, 0, 0, 0, 0,
> -                                               0, 0, 0, 59, 0, 0, 0, 59,
> -                                               0, 0, 59, 58, 0, 0, 59, 58,
> -                                               0, 59, 58, 57, 0, 59, 58, 57);
> +       __m512i permute_idx = _mm512_set_epi32(0x7060504, 0x7060504,
> +                                               0x6050403, 0x6050403,
> +                                               0x5040302, 0x5040302,
> +                                               0x4030201, 0x4030201,
> +                                               0x3020100, 0x3020100,
> +                                               0x20100FF, 0x20100FF,
> +                                               0x100FFFE, 0x100FFFE,
> +                                               0xFFFEFD, 0xFFFEFD);
> +       const __m512i rewind_idx = _mm512_set_epi32(0, 0, 0, 0, 0, 0, 0, 0,
> +                                                       0, 0, 0x3B, 0x3B,
> +                                                       0x3B3A, 0x3B3A,
> +                                                       0x3B3A39, 0x3B3A39);
>         const __mmask64 rewind_mask = RTE_THASH_REWIND_MSK;
>         const __m512i shift_8 = _mm512_set1_epi8(8);
>         __m512i xor_acc = _mm512_setzero_si512();
> --
> 2.25.1
>
This fixes the gcc 8 build issue on my CentOS 8 system.

Acked-by: Lance Richardson <lance.richardson@broadcom.com>
  

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Vladimir Medvedkin
> Sent: Tuesday, November 9, 2021 5:25 PM
> To: dev@dpdk.org
> Cc: thomas@monjalon.net; david.marchand@redhat.com; Ananyev,
> Konstantin <konstantin.ananyev@intel.com>;
> lance.richardson@broadcom.com; Medvedkin, Vladimir
> <vladimir.medvedkin@intel.com>; Wang, Yipeng1
> <yipeng1.wang@intel.com>; Gobriel, Sameh <sameh.gobriel@intel.com>;
> Richardson, Bruce <bruce.richardson@intel.com>
> Subject: [dpdk-dev] [PATCH] hash: fix thash gfni implementation
> 
> This patch replaces _mm512_set_epi8 with _mm512_set_epi32 due to the
> lack of support by some compilers.
> Also this patch checks if AVX512F is supported along with GFNI.
> This is done if the code is built on a platform that supports GFNI, but does not
> support AVX512.
> 
> Fixes: 4fd8c4cb0de1 ("hash: add new Toeplitz hash implementation")
> Cc: vladimir.medvedkin@intel.com
> 
> Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
Acked-by: Ji, Kai <kai.ji@intel.com>