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Re: [Xen-devel] [PATCH v8 28/50] x86emul: support AVX512F floating point manipulation insns
- To: Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Mon, 10 Jun 2019 15:01:11 +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 14:01:26 +0000
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On 29/05/2019 14:15, Jan Beulich wrote:
>>>> On 29.05.19 at 14:51, <andrew.cooper3@xxxxxxxxxx> wrote:
>> On 15/03/2019 10:56, Jan Beulich wrote:
>>> @@ -9681,6 +9696,21 @@ x86_emulate(
>>> op_bytes = 4;
>>> goto simd_imm8_zmm;
>>>
>>> + case X86EMUL_OPC_EVEX_66(0x0f3a, 0x26): /* vgetmantp{s,d}
>>> $imm8,[xyz]mm/mem,[xyz]mm{k} */
>>> + case X86EMUL_OPC_EVEX_66(0x0f3a, 0x54): /* vfixupimmp{s,d}
>>> $imm8,[xyz]mm/mem,[xyz]mm,[xyz]mm{k} */
>>> + host_and_vcpu_must_have(avx512f);
>>> + if ( ea.type != OP_REG || !evex.brs )
>>> + avx512_vlen_check(false);
>>> + goto simd_imm8_zmm;
>>> +
>>> + case X86EMUL_OPC_EVEX_66(0x0f3a, 0x27): /* vgetmants{s,d}
>>> $imm8,xmm/mem,xmm,xmm{k} */
>>> + case X86EMUL_OPC_EVEX_66(0x0f3a, 0x55): /* vfixupimms{s,d}
>>> $imm8,xmm/mem,xmm,xmm{k} */
>>> + host_and_vcpu_must_have(avx512f);
>>> + generate_exception_if(ea.type != OP_REG && evex.brs, EXC_UD);
>> Why the ea.type != OP_REG restriction? These four instructions do take
>> memory operands.
> Did you perhaps read the && as || ?
Oops - I did.
Sorry - I blame the jetlag.
~Andrew
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