KVM: x86 emulator: simplify two-byte opcode check
Two-byte opcode always start with 0x0F and the decode flags
of opcode 0xF0 is always 0, so remove dup check.
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index ddbad15..a9a4a0b 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2375,13 +2375,11 @@
/* Opcode byte(s). */
opcode = opcode_table[c->b];
- if (opcode.flags == 0) {
- /* Two-byte opcode? */
- if (c->b == 0x0f) {
- c->twobyte = 1;
- c->b = insn_fetch(u8, 1, c->eip);
- opcode = twobyte_table[c->b];
- }
+ /* Two-byte opcode? */
+ if (c->b == 0x0f) {
+ c->twobyte = 1;
+ c->b = insn_fetch(u8, 1, c->eip);
+ opcode = twobyte_table[c->b];
}
c->d = opcode.flags;