diff options
| author |   Wei Yongjun <yjwei@cn.fujitsu.com> | 2010-08-18 16:38:21 +0800 |
|---|---|---|
| committer |   Avi Kivity <avi@redhat.com> | 2010-10-24 10:51:11 +0200 |
| commit | f2f31845341d22e4f20438b05e83d58e71b723b5 (patch) | |
| tree | 8cfef24561e4d92786c4a1d9fffc9f1e14a12b76 /arch | |
| parent | KVM: x86 emulator: add CBW/CWDE/CDQE instruction emulation (diff) | |
| download | linux-dev-f2f31845341d22e4f20438b05e83d58e71b723b5.tar.xz linux-dev-f2f31845341d22e4f20438b05e83d58e71b723b5.zip | |
KVM: x86 emulator: add LOOP/LOOPcc instruction emulation
Add LOOP/LOOPcc instruction emulation (opcode 0xe0~0xe2).
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 312dda57f93b..2f816edfe31e 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2330,7 +2330,7 @@ static struct opcode opcode_table[256] = { /* 0xD8 - 0xDF */ N, N, N, N, N, N, N, N, /* 0xE0 - 0xE7 */ - N, N, N, N, + X3(D(SrcImmByte)), N, D(ByteOp | SrcImmUByte | DstAcc), D(SrcImmUByte | DstAcc), D(ByteOp | SrcAcc | DstImmUByte), D(SrcAcc | DstImmUByte), /* 0xE8 - 0xEF */ @@ -3084,6 +3084,12 @@ special_insn: c->src.val = c->regs[VCPU_REGS_RCX]; emulate_grp2(ctxt); break; + case 0xe0 ... 0xe2: /* loop/loopz/loopnz */ + register_address_increment(c, &c->regs[VCPU_REGS_RCX], -1); + if (address_mask(c, c->regs[VCPU_REGS_RCX]) != 0 && + (c->b == 0xe2 || test_cc(c->b ^ 0x5, ctxt->eflags))) + jmp_rel(c, c->src.val); + break; case 0xe4: /* inb */ case 0xe5: /* in */ goto do_io_in; |