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KVM: x86 emulator: implement 'and $imm, %{al|ax|eax}' 

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>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Nitin A Kamble 2007-08-17 15:17:41 +03:00 committed by Avi Kivity
parent 253abdee5e
commit 19eb938e01
1 changed files with 19 additions and 2 deletions
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21
drivers/kvm/x86_emulate.c
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@ -83,7 +83,7 @@ static u8 opcode_table[256] = {
/* 0x20 - 0x27 */ /* 0x20 - 0x27 */
ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM, ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM,
ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM, ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM,
0, 0, 0, 0, SrcImmByte, SrcImm, 0, 0,
/* 0x28 - 0x2F */ /* 0x28 - 0x2F */
ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM, ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM,
ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM, ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM,
@ -882,10 +882,27 @@ x86_emulate_memop(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
sbb: /* sbb */ sbb: /* sbb */
emulate_2op_SrcV("sbb", src, dst, _eflags); emulate_2op_SrcV("sbb", src, dst, _eflags);
break; break;
case 0x20 ... 0x25: case 0x20 ... 0x23:
and: /* and */ and: /* and */
emulate_2op_SrcV("and", src, dst, _eflags); emulate_2op_SrcV("and", src, dst, _eflags);
break; break;
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;
goto and;
case 0x28 ... 0x2d: case 0x28 ... 0x2d:
sub: /* sub */ sub: /* sub */
emulate_2op_SrcV("sub", src, dst, _eflags); emulate_2op_SrcV("sub", src, dst, _eflags);