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KVM: x86 emulator: simplify REX.W check

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

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2010-08-01 14:42:51 +03:00
parent d4709c78ee
commit 1e87e3efe7
1 changed files with 2 additions and 3 deletions
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5
arch/x86/kvm/emulate.c
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@ -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];