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[97.126.108.236]) by smtp.gmail.com with ESMTPSA id t65sm262863pfk.59.2017.09.06.09.06.51 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 06 Sep 2017 09:06:52 -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=Ha1eJVC/XlLZUGzBl9MJWLKgoWQzuKY2EFfYjP9LFKQ=; b=fKjXdkKI8Q+4xPflwbSboF8E28IrJYd3ZvRnAm1ggGa2EdVo3A68HaoK1H2mZlDqLr ynC7l2S8DPoC+HfdVd8SBH/6Pi9fh3CIe8GVI/tHuXoWG5YuXUuC4cZBNpz++vErPhcv 7SI11KdcRGzopenikqEQDUojNEJ7NMDXXs7RE= 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=Ha1eJVC/XlLZUGzBl9MJWLKgoWQzuKY2EFfYjP9LFKQ=; b=QUZCw8/JHzNUVQh1yaVu+ef0JDgUP+Rlp6ObFPh1DH1LmyYaKQyu9beOOCn9f695Ws F8DQAk8HQU0Ql+vRweNY84uPZN8TlYEFGvrtdcR44wKDIn5K+Fj+ffX7uEtSsUohmd5K vMccruFZekqYtHhmK2vRimGufk/K88N3qd06xwg/PerM/szthUVU3IMhNiOmDUgRtUZ/ PudpgeFQ5Vmprq8d9VkmV4HtYD60uquvjo3hgWQasffKdKD6Kjg4lavakk2A2/WCzi78 FqwjuvsAWCmB2bb4Ocs3OIz72fSYqEgKk/FXYBdX+Y8Kqvxnz/XU8BWFJUzMzP5dNxDH Usmw== X-Gm-Message-State: AHPjjUg+2q6sZUX/HoITF8RB7puIC4Qi0pOOSrdwL3TUzfz7Ipd8pmI3 TO5IeEx/QeSwc4aHLfYGKA== X-Google-Smtp-Source: ADKCNb4Vp7cOPnQfM83w4ymfDGY7YLTCnrAb/85romrbVW45iyDF+xRZjjwuR54wmEfjzLjDBmjVQw== X-Received: by 10.84.216.6 with SMTP id m6mr8719965pli.143.1504714013015; Wed, 06 Sep 2017 09:06:53 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Wed, 6 Sep 2017 09:06:09 -0700 Message-Id: <20170906160612.22769-30-richard.henderson@linaro.org> X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170906160612.22769-1-richard.henderson@linaro.org> References: <20170906160612.22769-1-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::236 Subject: [Qemu-devel] [PULL 29/32] target/arm: [a64] Move page and ss checks to init_disas_context 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 Since AArch64 uses a fixed-width ISA, we can pre-compute the number of insns remaining on the page. Also, we can check for single-step once. Reviewed-by: Emilio G. Cota Signed-off-by: Richard Henderson --- target/arm/translate-a64.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index 25c6622825..9017e30510 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -11206,6 +11206,7 @@ static int aarch64_tr_init_disas_context(DisasConte= xtBase *dcbase, DisasContext *dc =3D container_of(dcbase, DisasContext, base); CPUARMState *env =3D cpu->env_ptr; ARMCPU *arm_cpu =3D arm_env_get_cpu(env); + int bound; =20 dc->pc =3D dc->base.pc_first; dc->condjmp =3D 0; @@ -11254,8 +11255,14 @@ static int aarch64_tr_init_disas_context(DisasCont= extBase *dcbase, dc->is_ldex =3D false; dc->ss_same_el =3D (arm_debug_target_el(env) =3D=3D dc->current_el); =20 - dc->next_page_start =3D - (dc->base.pc_first & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE; + /* Bound the number of insns to execute to those left on the page. */ + bound =3D -(dc->base.pc_first | TARGET_PAGE_MASK) / 4; + + /* If architectural single step active, limit to 1. */ + if (dc->ss_active) { + bound =3D 1; + } + max_insns =3D MIN(max_insns, bound); =20 init_tmp_a64_array(dc); =20 @@ -11323,12 +11330,6 @@ static void aarch64_tr_translate_insn(DisasContext= Base *dcbase, CPUState *cpu) disas_a64_insn(env, dc); } =20 - if (dc->base.is_jmp =3D=3D DISAS_NEXT) { - if (dc->ss_active || dc->pc >=3D dc->next_page_start) { - dc->base.is_jmp =3D DISAS_TOO_MANY; - } - } - dc->base.pc_next =3D dc->pc; translator_loop_temp_check(&dc->base); } --=20 2.13.5