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[97.126.108.236]) by smtp.gmail.com with ESMTPSA id h19sm770678pfh.142.2017.09.07.15.41.16 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 07 Sep 2017 15:41:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=2N1o0vUjnZz5BCK8ZK7VFGbHwO2asiO5JbqCJsu9o+Y=; b=ic7ZBugQCPbzUP5aStxddpM+ys7WR/lxY0abfdStBcRYMnsSNXKJT5Jrpv79G1WJPe ELlS8ZRCfoanSXMJGjh+s9yLCy5mYPoXCKvdcyU3DE+wxo8Qr9hxCFWe07Uk/8gyVaeH 7Se/wQQlOz9jqXSY148eQMQzbT5g4xfQPAxaQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=2N1o0vUjnZz5BCK8ZK7VFGbHwO2asiO5JbqCJsu9o+Y=; b=Bk78j1nctPxBEsv2JtI513K4L/zaZ9NmJb7w6hKaCS3YyVxwpXIXIC7v+GFNIGALlH y7FfhjLgB+7WrhC7GWGHLjXNjPPasykojwJWBUtr9zIUpqkhCZBVGC9Rb9iX8teWdRSQ eEF2OSwG1tDPpMyItEhiP3FRnZILWLg5mwvZdOxGUcgiJRYgqKOlR9UVN2mMpgdLegmc H30S/20gSZQ60jiSL+7MVBpZCmy7gdhqsN92gkUhW/ztbivIUT+XtjA8FG7lBVTTSxlB o+adp0uU8w/nrFpSohUJHaDucx9ZJHN+I1iERnXZwGNdkmh5A+11NsmzIGe34ThGeZZP 4JPw== X-Gm-Message-State: AHPjjUhEvwjJvOHSpn1FaGGS5gPAA2lep3SP5MS8PfTBlh+ThIX5wAbq UW/l4LEL99HQHygbooLXdQ== X-Google-Smtp-Source: ADKCNb4LqiJVX+xYU9Adv2kxiCFAuWu2qk4MFd6rriOIgZ5961o1yziJdSVJ5zOrbzex9XAgol+b9Q== X-Received: by 10.99.54.7 with SMTP id d7mr956281pga.115.1504824077525; Thu, 07 Sep 2017 15:41:17 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Thu, 7 Sep 2017 15:40:44 -0700 Message-Id: <20170907224051.21518-17-richard.henderson@linaro.org> X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170907224051.21518-1-richard.henderson@linaro.org> References: <20170907224051.21518-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c00::230 Subject: [Qemu-devel] [PULL 16/23] tcg/arm: Tighten tlb indexing offset test X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Richard Henderson We are not going to use ldrd for loading the comparator for 32-bit guests, so don't limit cmp_off to 8 bits then. This eliminates one insn in the tlb load for some guests. Signed-off-by: Richard Henderson --- tcg/arm/tcg-target.inc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tcg/arm/tcg-target.inc.c b/tcg/arm/tcg-target.inc.c index 66c369c239..6c12b169ce 100644 --- a/tcg/arm/tcg-target.inc.c +++ b/tcg/arm/tcg-target.inc.c @@ -1202,7 +1202,9 @@ static TCGReg tcg_out_tlb_read(TCGContext *s, TCGReg = addrlo, TCGReg addrhi, } =20 /* We checked that the offset is contained within 16 bits above. */ - if (add_off > 0xfff || (use_armv6_instructions && cmp_off > 0xff)) { + if (add_off > 0xfff + || (use_armv6_instructions && TARGET_LONG_BITS =3D=3D 64 + && cmp_off > 0xff)) { tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R2, base, (24 << 7) | (cmp_off >> 8)); base =3D TCG_REG_R2; --=20 2.13.5