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From: "Qiu, Michael" <michael.qiu@intel.com>
To: Yerden Zhumabekov <e_zhumabekov@sts.kz>, "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 1/3] librte_hash: Fix unsupported instruction `crc32' in i686 platform
Date: Thu, 5 Mar 2015 16:34:52 +0000
Message-ID: <533710CFB86FA344BFBF2D6802E60286CEF2C5@SHSMSX101.ccr.corp.intel.com> (raw)
In-Reply-To: <54F87FEE.8090408@sts.kz>

On 2015/3/6 0:12, Yerden Zhumabekov wrote:
> Hi Michael,
>
> Thanks for this patch, in fact I didn't try to compile it on i686 when
> developing original software fallback for CRC32.
>
> I think if we want to make code compilable as wide as possible, we
> should compile out all SSE4.2 instructions. As to the patch, we may
> compile out 'crc32l' instruction emitting code if the arch is not x86.
> This concerns two functions: crc32c_sse42_u32() and
> crc32c_sse42_u64_mimic().

OK, I will add the check for crc32l, make it only works for x86

Thanks,
Michael
> The compile check might be something like this:
>
> #if defined(RTE_ARCH_I686) || defined(RTE_ARCH_X86_64)
> #endif
>
> Otherwise, the patch looks good.
>
> 05.03.2015 19:15, Michael Qiu пишет:
>> 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@intel.com>
>> ---
>>  lib/librte_hash/rte_hash_crc.h | 4 ++++
>>  1 file changed, 4 insertions(+)
>>
>> diff --git a/lib/librte_hash/rte_hash_crc.h b/lib/librte_hash/rte_hash_crc.h
>> index d28bb2a..4e9546f 100644
>> --- a/lib/librte_hash/rte_hash_crc.h
>> +++ b/lib/librte_hash/rte_hash_crc.h
>> @@ -374,6 +374,7 @@ crc32c_sse42_u32(uint32_t data, uint32_t init_val)
>>  	return init_val;
>>  }
>>  
>> +#ifdef RTE_ARCH_X86_64
>>  static inline uint32_t
>>  crc32c_sse42_u64(uint64_t data, uint64_t init_val)
>>  {
>> @@ -383,6 +384,7 @@ crc32c_sse42_u64(uint64_t data, uint64_t init_val)
>>  			: [data] "rm" (data));
>>  	return init_val;
>>  }
>> +#endif
>>  
>>  static inline uint32_t
>>  crc32c_sse42_u64_mimic(uint64_t data, uint64_t init_val)
>> @@ -476,8 +478,10 @@ rte_hash_crc_4byte(uint32_t data, uint32_t init_val)
>>  static inline uint32_t
>>  rte_hash_crc_8byte(uint64_t data, uint32_t init_val)
>>  {
>> +#ifdef RTE_ARCH_X86_64
>>  	if (likely(crc32_alg == CRC32_SSE42_x64))
>>  		return crc32c_sse42_u64(data, init_val);
>> +#endif
>>  
>>  	if (likely(crc32_alg & CRC32_SSE42))
>>  		return crc32c_sse42_u64_mimic(data, init_val);


  reply	other threads:[~2015-03-05 16:35 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-05 13:15 [dpdk-dev] [PATCH 0/3] dpdk2.0-rc1 build error fix Michael Qiu
2015-03-05 13:15 ` [dpdk-dev] [PATCH 1/3] librte_hash: Fix unsupported instruction `crc32' in i686 platform Michael Qiu
2015-03-05 16:10   ` Yerden Zhumabekov
2015-03-05 16:34     ` Qiu, Michael [this message]
2015-03-05 16:55   ` [dpdk-dev] [PATCH 1/3 v2] " Michael Qiu
2015-03-05 17:02     ` Yerden Zhumabekov
2015-03-05 17:10     ` Thomas Monjalon
2015-03-06  1:39       ` Qiu, Michael
2015-03-07 18:39         ` Thomas Monjalon
2015-03-10  3:55           ` Yerden Zhumabekov
2015-03-19  2:00           ` Qiu, Michael
2015-03-19  8:10             ` Thomas Monjalon
2015-03-09  5:58     ` [dpdk-dev] [PATCH 1/3 v3] " Michael Qiu
2015-03-18 13:20       ` Liu, Yong
2015-03-18 14:59         ` Qiu, Michael
2015-03-05 13:15 ` [dpdk-dev] [PATCH 2/3] app/test: Fix size_t printf formart issue Michael Qiu
2015-03-05 13:22   ` Bruce Richardson
2015-03-05 14:00   ` [dpdk-dev] [PATCH 2/3 v2] app/test: Fix size_t printf format issue Michael Qiu
2015-03-05 17:27     ` Thomas Monjalon
2015-03-06  1:42       ` Qiu, Michael
2015-03-06  3:53     ` [dpdk-dev] [PATCH 2/3 v3] " Michael Qiu
2015-03-05 13:15 ` [dpdk-dev] [PATCH 3/3] librte_eal/common: Fix redeclaration of enumerator ‘REG_EAX’ Michael Qiu
2015-03-05 13:23   ` Bruce Richardson
2015-03-05 13:36     ` David Marchand
2015-03-05 13:54       ` Qiu, Michael
2015-03-05 13:41     ` Qiu, Michael
2015-03-05 13:23   ` Qiu, Michael
2015-03-05 13:50   ` [dpdk-dev] [PATCH 3/3 v2] =?UTF-8?q?librte=5Feal/common:=20Fix=20redeclaration=20of?= =?UTF-8?q?=20enumerator=20=E2=80=98REG=5FEAX=E2=80=99?= Michael Qiu
2015-03-05 13:54     ` [dpdk-dev] [PATCH 3/3 v2] librte_eal/common: Fix redeclaration of enumerator ‘REG_EAX’ David Marchand
2015-03-05 14:03       ` Qiu, Michael
2015-03-05 14:38         ` Thomas Monjalon
2015-03-05 16:31           ` Qiu, Michael
2015-03-05 18:24             ` Thomas Monjalon
2015-03-05 13:57   ` [dpdk-dev] [PATCH 3/3 v3] =?UTF-8?q?librte=5Feal/common:=20Fix=20redeclaration=20of?= =?UTF-8?q?=20enumerator=20=E2=80=98REG=5FEAX=E2=80=99?= Michael Qiu
2015-03-06  6:28     ` [dpdk-dev] [PATCH 3/3 v3] librte_eal/common: Fix redeclaration of enumerator ‘REG_EAX’ David Marchand
2015-03-09 17:04 ` [dpdk-dev] [PATCH 0/3] dpdk2.0-rc1 build error fix Thomas Monjalon

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