KVM: x86 emulator: simplify REX.W check

(x && (x & y)) == (x & y) Signed-off-by: Avi Kivity <avi@redhat.com>

KVM: x86 emulator: simplify REX.W check
(x && (x & y)) == (x & y) Signed-off-by: Avi Kivity <avi@redhat.com>
1e87e3ef · Avi Kivity · d4709c78 · 1e87e3ef
Commit 1e87e3ef authored Aug 01, 2010 by Avi Kivity
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arch/x86/kvm/emulate.c arch/x86/kvm/emulate.c +2 -3

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--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2358,9 +2358,8 @@ 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 */
+	if (c->rex_prefix & 8)
+		c->op_bytes = 8;	/* REX.W */

 	/* Opcode byte(s). */
 	opcode = opcode_table[c->b];