[Mesa-dev] Build mesa-dev on Windows with AVX instruction set problem

[Ilia Mirkin]

On Wed, Oct 25, 2017 at 6:15 PM, Fabrício Ceolin <
fabricio.ceolin at miningmath.com> wrote:

> Hi,
>
> Thanks. I recompiled everything (on Windows) using this real machine:
>
> #under msys2
> $ cat /proc/cpuinfo
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 23
> model name      : Genuine Intel(R) CPU           U2300  @ 1.20GHz
> stepping        : 10
> cpu MHz         : 1197.000
> cache size      : 1024 KB
> physical id     : 0
> siblings        : 2
> core id         : 0
> cpu cores       : 2
> apicid          : 0
> initial apicid  : 0
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 13
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pni dtes64
> monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm xsave osxsave lahf_lm dtherm
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 36 bits physical, 48 bits virtual
> power management:
>
> but I got the same error:
>
> 00007FF85FBF874F 48 83 7A 18 10       cmp         qword ptr [rdx+18h],10h
> 00007FF85FBF8754 48 8B 6A 10          mov         rbp,qword ptr [rdx+10h]
> 00007FF85FBF8758 72 03                jb
> std::basic_string<char,std::char_traits<char>,std::allocator<char>
> >::basic_string<char,std::char_traits<char>,std::allocator<char> >+2Dh
> (07FF85FBF875Dh)
> 00007FF85FBF875A 48 8B 32             mov         rsi,qword ptr [rdx]
> 00007FF85FBF875D 48 83 FD 10          cmp         rbp,10h
> 00007FF85FBF8761 73 27                jae
>  std::basic_string<char,std::char_traits<char>,std::allocator<char>
> >::basic_string<char,std::char_traits<char>,std::allocator<char> >+5Ah
> (07FF85FBF878Ah)
> *00007FF85FBF8763 C5 F8 10 06          vmovups     xmm0,xmmword ptr
> [rsi]  *
> 00007FF85FBF8767 C5 F8 11 01          vmovups     xmmword ptr [rcx],xmm0
> 00007FF85FBF876B 48 89 69 10          mov         qword ptr [rcx+10h],rbp
>
> Are there any parameters that I can use for avoid to use AVX (or better)
> instructions?
>

LP_NATIVE_VECTOR_WIDTH=128 should force you to a non-avx path. There's also
a LP_FORCE_SSE2=1 which will also avoid sse3/4 usage. However all this
stuff should be getting detected, so it's odd that it's messing up. Perhaps
run with GALLIUM_DUMP_CPU=1 to see what's being detected?

  -ilia
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/mesa-dev/attachments/20171025/7b0ef6f4/attachment.html>