Re: [PATCH 0/2] KVM: x86 emulator: emulate MOVAPS and MOVAPD SSE instructions

From: Paolo Bonzini
Date: Mon Mar 17 2014 - 07:44:41 EST

Il 15/03/2014 23:39, H. Peter Anvin ha scritto:
MOVAPS, MOVAPD, and MOVDQA are the same operation. They may, architecturally, have different performance characteristics, but nothing that would affect an emulator.

In fact MOVAPS and MOVAPD are implemented the same way in this patch:

I(Aligned, em_mov), I(Aligned, em_mov), N, N,

These are respectively for no prefix, 0x66, 0xf2 and 0xf3. MOVDQA was already implemented, but on AMD some memcpy implementations use MOVAPS because it's a byte shorter.


On March 15, 2014 1:01:58 PM PDT, Igor Mammedov <imammedo@xxxxxxxxxx> wrote:
MS HCK test fails on 32-bit Windows 8.1 due to missing MOVAPS
instruction emulation, this series adds it and while at it,
it adds emulation of MOVAPD which is trivial to implement on
top of MOVAPS.

Igor Mammedov (2):
KVM: x86 emulator: emulate MOVAPS
KVM: x86 emulator: emulate MOVAPD

arch/x86/kvm/emulate.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

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