diff options
| author | Nitin A Kamble <nitin.a.kamble@intel.com> | 2007-10-12 17:40:33 -0700 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-01-30 17:52:53 +0200 |
| commit | d77a25074a8f845401f0eb786ebb8996e45d9e22 (patch) | |
| tree | 54729328075c2b822ebbb9266b9a23d4eeefd92c /drivers | |
| parent | 3176bc3e59cc4e30ac10888f08124b31969a7a88 (diff) | |
KVM: x86 emulator: Implement emulation of instruction: inc & dec
Instructions:
inc r16/r32 (opcode 0x40-0x47)
dec r16/r32 (opcode 0x48-0x4f)
Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/kvm/x86_emulate.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c index 75fd23bade9..988c6498640 100644 --- a/drivers/kvm/x86_emulate.c +++ b/drivers/kvm/x86_emulate.c @@ -96,8 +96,12 @@ static u8 opcode_table[256] = { ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM, ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM, 0, 0, 0, 0, - /* 0x40 - 0x4F */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + /* 0x40 - 0x47 */ + ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, + ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, + /* 0x48 - 0x4F */ + ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, + ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, /* 0x50 - 0x57 */ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps, @@ -1376,6 +1380,18 @@ special_insn: if (c->twobyte) goto twobyte_special_insn; switch (c->b) { + case 0x40 ... 0x47: /* inc r16/r32 */ + c->dst.bytes = c->op_bytes; + c->dst.ptr = (unsigned long *)&c->regs[c->b & 0x7]; + c->dst.val = *c->dst.ptr; + emulate_1op("inc", c->dst, ctxt->eflags); + break; + case 0x48 ... 0x4f: /* dec r16/r32 */ + c->dst.bytes = c->op_bytes; + c->dst.ptr = (unsigned long *)&c->regs[c->b & 0x7]; + c->dst.val = *c->dst.ptr; + emulate_1op("dec", c->dst, ctxt->eflags); + break; case 0x50 ... 0x57: /* push reg */ if (c->op_bytes == 2) c->src.val = (u16) c->regs[c->b & 0x7]; |