Commit d3ad6243 authored by Wei Yongjun's avatar Wei Yongjun Committed by Avi Kivity
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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: default avatarWei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent a58ddea5

arch/x86/kvm/emulate.c

+5 −7
Original line number Diff line number Diff line
@@ -2375,14 +2375,12 @@ x86_decode_insn(struct x86_emulate_ctxt *ctxt) 


	/* 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];

	}

	}

	c->d = opcode.flags;



	if (c->d & Group) {