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Re: [Xen-devel] [PATCH v8 30/50] x86emul: support AVX512{F, _VBMI2} compress/expand insns
- To: Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Mon, 10 Jun 2019 15:51:47 +0100
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- Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>
- Delivery-date: Mon, 10 Jun 2019 14:52:11 +0000
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On 15/03/2019 10:56, Jan Beulich wrote:
> +#if __GNUC__ > 7 /* can't check for __AVX512VBMI2__ here */
Why not?
> --- a/xen/tools/gen-cpuid.py
> +++ b/xen/tools/gen-cpuid.py
> @@ -266,10 +266,10 @@ def crunch_numbers(state):
> AVX512BW, AVX512VL, AVX512_4VNNIW, AVX512_4FMAPS,
> AVX512_VPOPCNTDQ],
>
> - # AVX512 extensions acting solely on vectors of bytes/words are made
> + # AVX512 extensions acting (solely) on vectors of bytes/words are
> made
Why the change here?
~Andrew
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