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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 11:17:50 +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 10:18:04 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 15/05/2019 09:23, Jan Beulich wrote:
> Their pre-AVX512 incarnations have clearly been overlooked during much
> earlier work. Their memory access pattern is entirely standard, so no
> specific tests get added to the harness.
>
> Reported-by: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>
> --- 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.
~Andrew
> case X86EMUL_OPC_66(0x0f, 0xf6): /* psadbw xmm/m128,xmm */
> case X86EMUL_OPC_VEX_66(0x0f, 0xf6): /* vpsadbw
> {x,y}mm/mem,{x,y}mm,{x,y}mm */
> CASE_SIMD_PACKED_INT(0x0f, 0xf8): /* psubb {,x}mm/mem,{,x}mm */
>
>
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