avx detected but OS not supported

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Roman

Joined: 21 Apr 2012
Posts: 1847

Roman 16 Aug 2013, 05:07

I write code:

Code:

 mov eax, 1
 cpuid
 and ecx, 018000000h ;check 27 bit (OS uses XSAVE/XRSTOR)
 cmp ecx, 018000000h ; and 28 (AVX supported by CPU)
 jne not_supported
 Msg 'AVX Detected !!!'
 sub ecx, ecx ; XFEATURE_ENABLED_MASK/XCR0 register number = 0
 xgetbv ; XFEATURE_ENABLED_MASK register is in edx:eax
 and eax,6 
 cmp eax,6 ; check the AVX registers restore at context switch
 jne OSnot_supported
 Msg 'AVX Supported !!!'
 mov eax, 1
 jmp Mnb
 not_supported:
 Msg 'AVX Not Supported'
 xor eax, eax
 jmp @f
OSnot_supported:
 Msg 'OS Not Supported AVX !'
 xor eax, eax
 jmp @f
Mnb:

16 Aug 2013, 05:07

Roman

Joined: 21 Apr 2012
Posts: 1847

Roman 16 Aug 2013, 05:12

My code detected AVX but failed on OSnot_supported.
I have Win 7 (but am not sure about ServicePack 1)

My procc Intel I-5 2320 (4 CPU)

What i must do to work with AMX commands?

16 Aug 2013, 05:12

Alphonso

Joined: 16 Jan 2007
Posts: 295

Alphonso 16 Aug 2013, 06:41

You need SP1

Run cmd box and type "ver"

6.1.7600 W7
6.1.7601 W7 SP1

16 Aug 2013, 06:41

Feryno

Joined: 23 Mar 2005
Posts: 514
Location: Czech republic, Slovak republic

Feryno 16 Aug 2013, 08:44

Hi, I installed this image available directly to download from ms:
7601.17514.101119-1850_x64fre_server_eval_en-us-GRMSXEVAL_EN_DVD.iso
then I installed AVX hotfix:
Windows6.1-KB2528507-x64.msu
AVX works, but I don't know whether AVX worked before applying hotfix or not.
CPU similar to your (Xeon E3 1230 v2 - it is without GPU unlike your).

16 Aug 2013, 08:44

Roman

Joined: 21 Apr 2012
Posts: 1847

Roman 18 Aug 2013, 06:43

Do not installed Win 7 ServicePack 1 x86.
Maybe can installed separately AVX hotfix for Win 7 x86 ?

Microsoft it's something. Created new pack to support the processor's instruction ! What's going on ?

18 Aug 2013, 06:43

Feryno

Joined: 23 Mar 2005
Posts: 514
Location: Czech republic, Slovak republic

Feryno 19 Aug 2013, 08:48

Hi Roman, then use Linux (new CPU features are implemented usually quickly and errors fixed in few days).

19 Aug 2013, 08:48

tthsqe

Joined: 20 May 2009
Posts: 767

tthsqe 20 Aug 2013, 06:02

Roman, did you get this to work on windows?
I wonder what kind of mess AVX 512 and AVX 3.0 are going to cause... Smile

http://en.wikipedia.org/wiki/Advanced_Vector_Extensions

20 Aug 2013, 06:02

HaHaAnonymous

Joined: 02 Dec 2012
Posts: 1178
Location: Unknown

HaHaAnonymous 20 Aug 2013, 14:47

[ Post removed by author. ]

Last edited by HaHaAnonymous on 28 Feb 2015, 20:09; edited 1 time in total

20 Aug 2013, 14:47

Roman

Joined: 21 Apr 2012
Posts: 1847

Roman 21 Aug 2013, 06:38

I use AVX 256 bits. Win 7 x86
My procc Intel I-5 2320 (4 CPU) 2011 year

21 Aug 2013, 06:38

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