Re: [Xen-devel] [PATCH v3 09/25] x86emul: support XOP insns

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 07/12/17 14:04, Jan Beulich wrote:
> @@ -8027,6 +8060,13 @@ x86_emulate(
>          generate_exception_if(vex.w, EXC_UD);
>          goto simd_0f_imm8_avx;
>  
> +    case X86EMUL_OPC_VEX_66(0x0f3a, 0x48): /* vpermil2ps 
> $imm,{x,y}mm/mem,{x,y}mm,{x,y}mm,{x,y}mm */
> +                                           /* vpermil2ps 
> $imm,{x,y}mm,{x,y}mm/mem,{x,y}mm,{x,y}mm */
> +    case X86EMUL_OPC_VEX_66(0x0f3a, 0x49): /* vpermil2pd 
> $imm,{x,y}mm/mem,{x,y}mm,{x,y}mm,{x,y}mm */
> +                                           /* vpermil2pd 
> $imm,{x,y}mm,{x,y}mm/mem,{x,y}mm,{x,y}mm */
> +        host_and_vcpu_must_have(xop);
> +        goto simd_0f_imm8_ymm;

Is this correct?  VEX.W selects which operand may be the memory operand,
and I don't see anything in the decode which copes, or anything in the
stub which adjusts .W.

~Andrew

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