Coming from a world where no two compilers are alike, I have some
experience with such problems.
#ifndef HAVE__XGETBV /* set by autoconf or in boinc_win.h */
static unsigned long long _xgetbv(unsigned int index){
unsigned int A, D;
#ifdef __GNUC__
#ifdef ASM_SUPPORTS_XGETBV /* gcc version >= 4.4, but better tested by
autoconf */
__asm__ __volatile__("xgetbv" : "=a"(A), "=d"(D) : "c"(index));
#else
__asm__ __volatile__(".byte 0x0f, 0x01, 0xd0": "=a"(A), "=d"(D) :
"c"(index));
#endif
#elif defined(_MSC_VER)
#ifdef _M_IX86
__asm {
mov ecx,index
__emit 00fh
__emit 001h
__emit 0d0h
mov D,edx
mov A,eax
}
#elif defined(_M_AMD64)
// damn Microsoft for not having inline assembler in 64-bit code
// so this is in an NASM compiled library
return asm_xgetbv(index);
#endif
return ((unsigned long long)D << 32) | A;
#else
return 0;
#endif
}
#endif
On Thu, May 22, 2014 at 3:52 PM, Rom Walton <[email protected]> wrote:
> I meant to say not supported.
>
> ----- Rom
>
> -----Original Message-----
> From: boinc_dev [mailto:[email protected]] On Behalf Of
> Rom Walton
> Sent: Thursday, May 22, 2014 6:49 PM
> To: Raistmer the Sorcerer
> Cc: BOINC Dev Mailing List
> Subject: Re: [boinc_dev] WINBUILD: Minimum supported VS is now VS 2010
>
> It is my understanding that the '_xgetbv' intrinsic is supported in VS2008.
>
>
>
> ----- Rom
>
>
>
> From: Raistmer the Sorcerer [mailto:[email protected]]
> Sent: Thursday, May 22, 2014 6:46 PM
> To: Rom Walton
> Cc: BOINC Dev Mailing List; Jord van der Elst
> Subject: Re[2]: [boinc_dev] WINBUILD: Minimum supported VS is now VS 2010
>
>
>
> That is, this code will do wrong being compiled with VS2008?
>
> int cpuInfo[4];
>
> __cpuid(cpuInfo, 1);
>
>
>
> bool osUsesXSAVE_XRSTORE = cpuInfo[2] & (1 << 27) || false;
>
> bool cpuAVXSuport = cpuInfo[2] & (1 << 28) || false;
>
>
>
> if (osUsesXSAVE_XRSTORE && cpuAVXSuport)
>
> {
>
> // Check if the OS will save the YMM registers
>
> unsigned long long xcrFeatureMask =
> _xgetbv(_XCR_XFEATURE_ENABLED_MASK);
>
> avxSupported = (xcrFeatureMask & 0x6) || false;
>
> }
>
> __cpuid() will not report correctly?
>
>
>
>
> Thu, 22 May 2014 17:47:28 -0400 от "Rom Walton" <[email protected]>:
>
> Demand for AVX detection and support:
>
>
> http://insufficientlycomplicated.wordpress.com/2011/11/07/detecting-intel-advanced-vector-extensions-avx-in-visual-studio/
>
>
>
> ----- Rom
>
>
>
> From: Raistmer the Sorcerer [mailto:[email protected]]
> Sent: Thursday, May 22, 2014 5:19 PM
> To: Jord van der Elst
> Cc: BOINC Dev Mailing List; Rom Walton
> Subject: Re: [boinc_dev] WINBUILD: Minimum supported VS is now VS 2010
>
>
>
> What reasons behind of this version shift?
> What unresolvable problems with VS2008 ?
>
>
>
> Thu, 22 May 2014 16:54:15 +0200 от Jord van der Elst <[email protected] <
> https://e.mail.ru/compose/?mailto=mailto%[email protected]> >:
>
> WINBUILD: Minimum supported VS is now VS 2010
>
> So then that means that someone has to retest and rewrite all and
> everything of http://boinc.berkeley.edu/trac/wiki/CompileClient#Windowsas the
> compilers the page is written for are VS 2005 (Express) and 2008.
>
> And what VS, full VS or is Express also an option?
> Or is Express still not capable of compiling 64bit applications?
>
> Thanks,
>
> -- Jord van der Elst.
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>
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