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Commit 28867cee authored by Avi Kivity's avatar Avi Kivity
Browse files

KVM: x86 emulator: add 8-bit memory operands 



Useful for MOVSX/MOVZX.

Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 54f65795

arch/x86/kvm/emulate.c

+5 −0
Original line number Original line Diff line number Diff line
@@ -57,6 +57,7 @@ 
#define OpDS              23ull  /* DS */

#define OpDS              23ull  /* DS */

#define OpFS              24ull  /* FS */

#define OpFS              24ull  /* FS */

#define OpGS              25ull  /* GS */

#define OpGS              25ull  /* GS */

#define OpMem8            26ull  /* 8-bit zero extended memory operand */





#define OpBits             5  /* Width of operand field */

#define OpBits             5  /* Width of operand field */

#define OpMask             ((1ull << OpBits) - 1)

#define OpMask             ((1ull << OpBits) - 1)
@@ -101,6 +102,7 @@ 
#define SrcAcc      (OpAcc << SrcShift)

#define SrcAcc      (OpAcc << SrcShift)

#define SrcImmU16   (OpImmU16 << SrcShift)

#define SrcImmU16   (OpImmU16 << SrcShift)

#define SrcDX       (OpDX << SrcShift)

#define SrcDX       (OpDX << SrcShift)

#define SrcMem8     (OpMem8 << SrcShift)

#define SrcMask     (OpMask << SrcShift)

#define SrcMask     (OpMask << SrcShift)

#define BitOp       (1<<11)

#define BitOp       (1<<11)

#define MemAbs      (1<<12)      /* Memory operand is absolute displacement */

#define MemAbs      (1<<12)      /* Memory operand is absolute displacement */
@@ -3656,6 +3658,9 @@ static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op, 
	case OpImm:

	case OpImm:

		rc = decode_imm(ctxt, op, imm_size(ctxt), true);

		rc = decode_imm(ctxt, op, imm_size(ctxt), true);

		break;

		break;

	case OpMem8:

		ctxt->memop.bytes = 1;

		goto mem_common;

	case OpMem16:

	case OpMem16:

		ctxt->memop.bytes = 2;

		ctxt->memop.bytes = 2;

		goto mem_common;

		goto mem_common;