From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: [PATCH 1/2] KVM: x86 emulator: add 8-bit memory operands Date: Mon, 16 Jan 2012 15:08:44 +0200 Message-ID: <1326719325-23184-2-git-send-email-avi@redhat.com> References: <1326719325-23184-1-git-send-email-avi@redhat.com> Cc: kvm@vger.kernel.org, namit@cs.technion.ac.il To: Marcelo Tosatti Return-path: Received: from mx1.redhat.com ([209.132.183.28]:46177 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754717Ab2APNJk (ORCPT ); Mon, 16 Jan 2012 08:09:40 -0500 In-Reply-To: <1326719325-23184-1-git-send-email-avi@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: Useful for MOVSX/MOVZX. Signed-off-by: Avi Kivity --- arch/x86/kvm/emulate.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 05a562b..92a45dd 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -57,6 +57,7 @@ #define OpDS 23ull /* DS */ #define OpFS 24ull /* FS */ #define OpGS 25ull /* GS */ +#define OpMem8 26ull /* 8-bit zero extended memory operand */ #define OpBits 5 /* Width of operand field */ #define OpMask ((1ull << OpBits) - 1) @@ -101,6 +102,7 @@ #define SrcAcc (OpAcc << SrcShift) #define SrcImmU16 (OpImmU16 << SrcShift) #define SrcDX (OpDX << SrcShift) +#define SrcMem8 (OpMem8 << SrcShift) #define SrcMask (OpMask << SrcShift) #define BitOp (1<<11) #define MemAbs (1<<12) /* Memory operand is absolute displacement */ @@ -3605,6 +3607,9 @@ static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op, case OpImm: rc = decode_imm(ctxt, op, imm_size(ctxt), true); break; + case OpMem8: + ctxt->memop.bytes = 1; + goto mem_common; case OpMem16: ctxt->memop.bytes = 2; goto mem_common; -- 1.7.7.1