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[173.197.98.123]) by smtp.gmail.com with ESMTPSA id c63sm27368589pfk.79.2017.07.15.02.43.50 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 15 Jul 2017 02:43:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=egeu+YlPzYvIryMSwbo5grgbi5RzuGxh+QQaTCRWf7c=; b=ADOh6VJmJVlPKiKTedHSuEhQbtGGqu4IMu44ldZYj7OKy0Dv5tSJfsOhAdk884v0cB 0m8OUo+6yOfhGPNBp+EGF81CILcdxmyYtuyxIrcc904hTsTC9GdOJTU0HdgmbaLiI9PG KXnLlTN8ZLLxZBts6HTdbkUOt6+PUCzYseFUHXDpWalMtpWBQlTmGa9fPENXle385Nut 6w5lGOoMYmLKTNl0gpERblxea/rXvlCRnzcTwgnxvETjeJiOU3xLxuco6DTaT/fCYlv1 g7mgeYcWAyRP3Gwwj2/3WQnXf29UrG+lwQOpdKkJk2YaUew68hQbXeynO3WRCgkOIHQW Cfeg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references; bh=egeu+YlPzYvIryMSwbo5grgbi5RzuGxh+QQaTCRWf7c=; b=Up+YnIMgAFK4IYZUY/r52PD922lpQhswP2/qVXzZRuWKqG9zNAMNsU86yZao0CoLPM ApWXLUPhbey1MmXTi4u4Nr8cfQdlyqlEDc/lHxtQhWqom6pEc0xE0KEVAePC+hATc1OS VxmyQWwhg9Bxi93pplWUXcp74mfALM6IZx5H9RLpI7p6ltwB2sABt2d2S/MQ7XT1THlS PqfgKrbgiQ+AIx/cOtL54S8g3BoTSSZ9EfEnE63915is7tMC15fyI5vt6lsSEEIKPMaW MWeRTqViI/jpBYJZdifhSQD2hB9xa8kbikEC9p8g3NH0GvcPblQwjhRvYDq2O9b2QQDr l4uQ== X-Gm-Message-State: AIVw112buJoGGv2ZLRIQA9b/ZPcRkO5nKMuNYqZNlFNRR+19hq8r+4sw eHe/YBimbKzxMYYhvwU= X-Received: by 10.98.152.86 with SMTP id q83mr570820pfd.149.1500111832271; Sat, 15 Jul 2017 02:43:52 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Fri, 14 Jul 2017 23:42:40 -1000 Message-Id: <20170715094243.28371-32-rth@twiddle.net> X-Mailer: git-send-email 2.9.4 In-Reply-To: <20170715094243.28371-1-rth@twiddle.net> References: <20170715094243.28371-1-rth@twiddle.net> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c05::242 Subject: [Qemu-devel] [PATCH v14 31/34] 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: pbonzini@redhat.com, cota@braap.org, alex.bennee@linaro.org, vilanova@ac.upc.edu, crosthwaite.peter@gmail.com 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" 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. Signed-off-by: Richard Henderson Reviewed-by: Emilio G. Cota --- 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 1aa4c14..41e5cc3 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -11196,6 +11196,7 @@ 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; @@ -11244,8 +11245,14 @@ 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 @@ -11313,12 +11320,6 @@ 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 2.9.4