Displaying 5 results from an estimated 5 matches for "getx86cpuidandinfoex".
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getx86cpuidandinfo
2013 Nov 23
0
[LLVMdev] [PATCH] Detect Haswell subarchitecture (i.e. using -march=native)
...o be not only 60, but also 63, 69 & 70 model, following changes in Linux kernel & Xen. Also set 62 as Ivy Bridge EP aka E5 v3 (which I has in my workstation).
Cheers,
--
Adam
Detects x86 family 6 model 60, 63, 69, 70 CPU that has AVX2 CPUID leaf 7
subleaf 0 AVX2 flag as core-avx2.
Port GetX86CpuIDAndInfoEx from X86MCTargetDesc to support x86 CPUID subleafs.
Also detect family 6 model 62 (0x3E) Ivy Bridge EP as core-avx-i.
---
lib/Support/Host.cpp | 96 ++++++++++++++++++++++++++++++++++++++---
lib/Target/X86/X86Subtarget.cpp | 7 ++-
2 files changed, 96 insertions(+), 7 deletions(-)
di...
2013 Nov 23
2
[LLVMdev] [PATCH] Detect Haswell subarchitecture (i.e. using -march=native)
I agree with Tim, you need to implement a GetCpuIDAndInfoEx function in
Host.cpp and pass the correct value to ecx. Also you need to verify that 7
is a valid leaf because an invalid leaf is defined to return the highest
supported leaf on that processor. So if a processor supports say leaf 6 and
not leaf 7, then an access leaf 7 will return the data from leaf 6 causing
unrelated bits to be
2013 Sep 13
0
[LLVMdev] [PATCH] Detect Haswell subarchitecture (i.e. using -march=native)
Pretty sure you need to check EAX>=7 from cpuid leaf 0 before calling leaf
7 and you need to use the pass ECX=0 to leaf 7. See
lib/Target/X86/X86Subtarget.cpp which uses a GetX86CpuIDAndInfoEx function
to pass EAX and ECX to cpuid.
I don't think it explains your compiler bug though.
On Thu, Sep 12, 2013 at 2:12 PM, Adam Strzelecki <ono at java.pl> wrote:
> > Anyway, thanks very much for the information. Hopefully that'll let me
> > track things down.
>
&g...
2013 Sep 12
2
[LLVMdev] [PATCH] Detect Haswell subarchitecture (i.e. using -march=native)
> Anyway, thanks very much for the information. Hopefully that'll let me
> track things down.
Let me know if you need some more information or dumps.
> Would you mind me taking a day or so to investigate what's going on
> here properly? Introducing a volatile to work around a bug in Clang
> itself just seems perverse to me. (And we shouldn't let a CodeGen bug
>
2013 Sep 13
2
[LLVMdev] [PATCH] Detect Haswell subarchitecture (i.e. using -march=native)
...d cpuid to return 0.
On Thu, Sep 12, 2013 at 9:29 PM, Craig Topper <craig.topper at gmail.com>wrote:
> Pretty sure you need to check EAX>=7 from cpuid leaf 0 before calling leaf
> 7 and you need to use the pass ECX=0 to leaf 7. See
> lib/Target/X86/X86Subtarget.cpp which uses a GetX86CpuIDAndInfoEx function
> to pass EAX and ECX to cpuid.
>
> I don't think it explains your compiler bug though.
>
>
> On Thu, Sep 12, 2013 at 2:12 PM, Adam Strzelecki <ono at java.pl> wrote:
>
>> > Anyway, thanks very much for the information. Hopefully that'll let me
&...