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Re: [Xen-devel] [PATCH] x86emul: add support for missing {, V}PMADDWD insns
- To: Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Wed, 15 May 2019 12:59:11 +0100
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- Cc: Wei Liu <wei.liu2@xxxxxxxxxx>, Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>
- Delivery-date: Wed, 15 May 2019 11:59:24 +0000
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On 15/05/2019 12:50, Jan Beulich wrote:
>>>> On 15.05.19 at 12:17, <andrew.cooper3@xxxxxxxxxx> wrote:
>> On 15/05/2019 09:23, Jan Beulich wrote:
>>> --- a/xen/arch/x86/x86_emulate/x86_emulate.c
>>> +++ b/xen/arch/x86/x86_emulate/x86_emulate.c
>>> @@ -6624,6 +6624,8 @@ x86_emulate(
>>> case X86EMUL_OPC_VEX_66(0x0f, 0xf3): /* vpsllq
>>> xmm/m128,{x,y}mm,{x,y}mm */
>>> case X86EMUL_OPC_66(0x0f, 0xf4): /* pmuludq xmm/m128,xmm */
>>> case X86EMUL_OPC_VEX_66(0x0f, 0xf4): /* vpmuludq
>>> {x,y}mm/mem,{x,y}mm,{x,y}mm */
>>> + CASE_SIMD_PACKED_INT(0x0f, 0xf5): /* pmaddwd {,x}mm/mem,{,x}mm */
>>> + case X86EMUL_OPC_VEX_66(0x0f, 0xf5): /* vpmaddwd
>>> {x,y}mm/mem,{x,y}mm,{x,y}mm */
>> Nothing on this path checks for SSSE3, AFAICT.
> Of course not - the insn first got introduced with MMX, then
> promoted with SSE2 and again with AVX and AVX2.
Oh - terribly sorry - I was reading the adjacent instruction in the manual.
Sorry for the noise.
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
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