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From: Avi Kivity <avi@redhat.com>
To: kvm@vger.kernel.org, Marcelo Tosatti <mtosatti@redhat.com>
Subject: [PATCH 07/15] KVM: x86 emulator: simplify REX.W check
Date: Sun,  1 Aug 2010 17:23:25 +0300	[thread overview]
Message-ID: <1280672613-14026-8-git-send-email-avi@redhat.com> (raw)
In-Reply-To: <1280672613-14026-1-git-send-email-avi@redhat.com>

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

Signed-off-by: Avi Kivity <avi@redhat.com>
---
 arch/x86/kvm/emulate.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 2ae2e54..a114fa9 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2353,9 +2353,8 @@ 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];
-- 
1.7.1


  parent reply	other threads:[~2010-08-01 14:23 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-08-01 14:23 [PATCH 00/15] More emulator cleanups Avi Kivity
2010-08-01 14:23 ` [PATCH 01/15] KVM: x86 emulator: push segment override out of decode_modrm() Avi Kivity
2010-08-01 14:23 ` [PATCH 02/15] KVM: x86 emulator: use correct type for memory address in operands Avi Kivity
2010-08-01 14:23 ` [PATCH 03/15] KVM: x86 emulator: simplify xchg decode tables Avi Kivity
2010-08-01 14:23 ` [PATCH 04/15] KVM: x86 emulator: use SrcAcc to simplify xchg decoding Avi Kivity
2010-08-01 14:23 ` [PATCH 05/15] KVM: x86 emulator: put register operand fetch into a function Avi Kivity
2010-08-01 14:23 ` [PATCH 06/15] KVM: x86 emulator: drop use_modrm_ea Avi Kivity
2010-08-01 14:23 ` Avi Kivity [this message]
2010-08-01 14:23 ` [PATCH 08/15] KVM: x86 emulator: introduce Force64 for forcing operand size to 64 bits Avi Kivity
2010-08-01 14:23 ` [PATCH 09/15] KVM: x86 emulator: mark mov cr and mov dr as 64-bit instructions in long mode Avi Kivity
2010-08-02  7:37   ` Avi Kivity
2010-08-01 14:23 ` [PATCH 10/15] KVM: x86 emulator: use struct operand for mov reg,cr and mov cr,reg for reg op Avi Kivity
2010-08-01 14:23 ` [PATCH 11/15] KVM: x86 emulator: use struct operand for mov reg,dr and mov dr,reg " Avi Kivity
2010-08-01 14:23 ` [PATCH 12/15] KVM: x86 emulator: add NoAccess flag for memory instructions that skip access Avi Kivity
2010-08-01 14:23 ` [PATCH 13/15] KVM: x86 emulator: switch LEA to use SrcMem decoding Avi Kivity
2010-08-01 14:23 ` [PATCH 14/15] KVM: x86 emulator: change invlpg emulation to use src.mem.addr Avi Kivity
2010-08-01 14:23 ` [PATCH 15/15] KVM: x86 emulator: Decode memory operands directly into a 'struct operand' Avi Kivity
2010-08-02  7:28   ` Paolo Bonzini
2010-08-02  7:36     ` Avi Kivity

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