[Patch] (big) real mode emulation - and ax imm

[Nitin A Kamble <nitin.a.kamble-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]

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Hi Avi,
 Attached is the patch to implement "and al imm8", "and ax imm16" & "
and eax imm32" instructions.
  Please apply or comment.
-- 
Thanks & Regards,
Nitin
Open Source Technology Center, Intel Corporation
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commit 16312d9a828af54d3d4ad7dc0a9a1f038de72bf6
Author: Nitin A Kamble <nitin.a.kamble@intel.com>
Date:   Thu Aug 16 19:19:44 2007 -0700

    Implement emulation of instruction
    	and al imm8 (opcode 0x24)
    	and ax/eax imm16/imm32 (opcode 0x25)
    
    Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>

diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index a2d520b..cfdbaa5 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -83,7 +83,7 @@ static u8 opcode_table[256] = {
 	/* 0x20 - 0x27 */
 	ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM,
 	ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM,
-	0, 0, 0, 0,
+	SrcImmByte, SrcImm, 0, 0,
 	/* 0x28 - 0x2F */
 	ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM,
 	ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM,
@@ -890,7 +890,23 @@ done_prefixes:
 	      sbb:		/* sbb */
 		emulate_2op_SrcV("sbb", src, dst, _eflags);
 		break;
-	case 0x20 ... 0x25:
+	case 0x24:              /* and al imm8 */
+		dst.type = OP_REG;
+		dst.ptr = &_regs[VCPU_REGS_RAX];
+		dst.val = *(u8 *)dst.ptr;
+		dst.bytes = 1;
+		dst.orig_val = dst.val;
+		goto and;
+	case 0x25:              /* and ax imm16, or eax imm32 */
+		dst.type = OP_REG;
+		dst.bytes = op_bytes;
+		dst.ptr = &_regs[VCPU_REGS_RAX];
+		if (op_bytes == 2)
+			dst.val = *(u16 *)dst.ptr;
+		else
+			dst.val = *(u32 *)dst.ptr;
+		dst.orig_val = dst.val;
+	case 0x20 ... 0x23:
 	      and:		/* and */
 		emulate_2op_SrcV("and", src, dst, _eflags);
 		break;

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