From: Wei Yongjun <[email protected]> Add LOOP/LOOPcc instruction emulation (opcode 0xe0~0xe2).
Signed-off-by: Wei Yongjun <[email protected]> Signed-off-by: Avi Kivity <[email protected]> diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 6aba3bb..c37fb01 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2331,7 +2331,7 @@ 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 */ @@ -3085,6 +3085,12 @@ 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; -- To unsubscribe from this list: send the line "unsubscribe kvm-commits" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
