KVM: x86 emulator: simplify REX.W check



(x && (x & y)) == (x & y)

Signed-off-by: Avi Kivity <avi@redhat.com>

parent d4709c78

arch/x86/kvm/emulate.c

+2 −3

Original line number	Diff line number	Diff line
		@@ -2358,7 +2358,6 @@ x86_decode_insn(struct x86_emulate_ctxt *ctxt)
		done_prefixes:

		/* REX prefix. */
		if (c->rex_prefix)
		if (c->rex_prefix & 8)
		c->op_bytes = 8; /* REX.W */