From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yerden Zhumabekov <e_zhumabekov-8EHiFRVJVgQ@public.gmane.org>
Subject: Re: [PATCH 1/3 v2] librte_hash: Fix unsupported
 instruction `crc32' in i686 platform
Date: Thu, 5 Mar 2015 23:02:45 +0600
Message-ID: <54F88C35.3070602@sts.kz>
References: <1425561339-13300-2-git-send-email-michael.qiu@intel.com>
 <1425574530-16019-1-git-send-email-michael.qiu@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="windows-1251"
Content-Transfer-Encoding: quoted-printable
To: Michael Qiu <michael.qiu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>, <dev-VfR2kkLFssw@public.gmane.org>
Return-path: <dev-bounces-VfR2kkLFssw@public.gmane.org>
In-Reply-To: <1425574530-16019-1-git-send-email-michael.qiu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request-VfR2kkLFssw@public.gmane.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev-VfR2kkLFssw@public.gmane.org>
List-Help: <mailto:dev-request-VfR2kkLFssw@public.gmane.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request-VfR2kkLFssw@public.gmane.org?subject=subscribe>
Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org
Sender: "dev" <dev-bounces-VfR2kkLFssw@public.gmane.org>

Acked-by: Yerden Zhumabekov <yerden.zhumabekov-8EHiFRVJVgQ@public.gmane.org>

05.03.2015 22:55, Michael Qiu =EF=E8=F8=E5=F2:
> CC rte_hash.o
> Error: unsupported instruction `crc32'
>
> The root cause is that i686 platform does not support 'crc32q'
> Need make it only available in x86_64 platform
>
> Signed-off-by: Michael Qiu <michael.qiu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> ---
> v2 --> v1:
>          Make crc32 instruction only works in X86 platform
>  lib/librte_hash/rte_hash_crc.h | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/lib/librte_hash/rte_hash_crc.h b/lib/librte_hash/rte_hash_=
crc.h
> index d28bb2a..c0a789e 100644
> --- a/lib/librte_hash/rte_hash_crc.h
> +++ b/lib/librte_hash/rte_hash_crc.h
> @@ -364,6 +364,7 @@ crc32c_2words(uint64_t data, uint32_t init_val)
>  	return crc;
>  }
> =20
> +#if defined RTE_ARCH_I686 || defined RTE_ARCH_X86_64
>  static inline uint32_t
>  crc32c_sse42_u32(uint32_t data, uint32_t init_val)
>  {
> @@ -373,7 +374,9 @@ crc32c_sse42_u32(uint32_t data, uint32_t init_val)
>  			: [data] "rm" (data));
>  	return init_val;
>  }
> +#endif
> =20
> +#ifdef RTE_ARCH_X86_64
>  static inline uint32_t
>  crc32c_sse42_u64(uint64_t data, uint64_t init_val)
>  {
> @@ -383,7 +386,9 @@ crc32c_sse42_u64(uint64_t data, uint64_t init_val)
>  			: [data] "rm" (data));
>  	return init_val;
>  }
> +#endif
> =20
> +#if defined RTE_ARCH_I686 || defined RTE_ARCH_X86_64
>  static inline uint32_t
>  crc32c_sse42_u64_mimic(uint64_t data, uint64_t init_val)
>  {
> @@ -397,6 +402,7 @@ crc32c_sse42_u64_mimic(uint64_t data, uint64_t init=
_val)
>  	init_val =3D crc32c_sse42_u32(d.u32[1], init_val);
>  	return init_val;
>  }
> +#endif
> =20
>  #define CRC32_SW            (1U << 0)
>  #define CRC32_SSE42         (1U << 1)
> @@ -455,8 +461,10 @@ rte_hash_crc_init_alg(void)
>  static inline uint32_t
>  rte_hash_crc_4byte(uint32_t data, uint32_t init_val)
>  {
> +#if defined RTE_ARCH_I686 || defined RTE_ARCH_X86_64
>  	if (likely(crc32_alg & CRC32_SSE42))
>  		return crc32c_sse42_u32(data, init_val);
> +#endif
> =20
>  	return crc32c_1word(data, init_val);
>  }
> @@ -476,11 +484,15 @@ rte_hash_crc_4byte(uint32_t data, uint32_t init_v=
al)
>  static inline uint32_t
>  rte_hash_crc_8byte(uint64_t data, uint32_t init_val)
>  {
> +#ifdef RTE_ARCH_X86_64
>  	if (likely(crc32_alg =3D=3D CRC32_SSE42_x64))
>  		return crc32c_sse42_u64(data, init_val);
> +#endif
> =20
> +#if defined RTE_ARCH_I686 || defined RTE_ARCH_X86_64
>  	if (likely(crc32_alg & CRC32_SSE42))
>  		return crc32c_sse42_u64_mimic(data, init_val);
> +#endif
> =20
>  	return crc32c_2words(data, init_val);
>  }

--=20
Sincerely,

Yerden Zhumabekov
State Technical Service
Astana, KZ