From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7598FC433B4 for ; Mon, 17 May 2021 18:18:01 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DB1AB611BF for ; Mon, 17 May 2021 18:18:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DB1AB611BF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=vivier.eu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:56438 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lihoT-0000eP-7U for qemu-devel@archiver.kernel.org; Mon, 17 May 2021 14:17:57 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33646) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lihlF-0005ua-Q1 for qemu-devel@nongnu.org; Mon, 17 May 2021 14:14:37 -0400 Received: from mout.kundenserver.de ([212.227.126.130]:60007) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lihl9-0004Kp-Ed for qemu-devel@nongnu.org; Mon, 17 May 2021 14:14:37 -0400 Received: from quad ([82.142.31.78]) by mrelayeu.kundenserver.de (mreue010 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MhlXE-1lDkf63wBM-00dr7n; Mon, 17 May 2021 20:14:29 +0200 From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [PULL 06/59] linux-user/arm: Simplify accumulating and raising fpa11 exceptions Date: Mon, 17 May 2021 20:13:31 +0200 Message-Id: <20210517181424.8093-7-laurent@vivier.eu> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210517181424.8093-1-laurent@vivier.eu> References: <20210517181424.8093-1-laurent@vivier.eu> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:0YAoTbXnbC6iGb9edyFhAr5Hobsf0tJgXBmf2naxTYBYYwtM0CS JATKoO2dDef5GGuf/MBZrxOQf9ZK3UEefuUXJwCfjRFPaQfIbUrMn5lqWoee/TUkQ8uXj4E ABzJJZEMiqffNtmFEies1eJUgrN6ZkuCjZeIO0lX8kjtdqjQDGZyC9pssxyHXDAZwgBCTaH yvDsbUy8V20d97uHydn1g== X-UI-Out-Filterresults: notjunk:1;V03:K0:6eAcCOPt7PA=:y9JF4kPYGHTljrQvgNRABp zoUNNfZPoJDQP7xO4Cj2mHF5KyVfoCsHhnTQMYsUNC3t7izGGFaGZ2Ox7RN/7EynUFP8c2HdT mI+g0DTVbgt/c+IEQneAqN8Tya8C9JZf/ZY4CwuHrX0IcHIQUtfnGD2YpbTkdvSUXP9gNEmeM w5vm9cTNMLVlt6vzsZGqJZ2Q958av34RqihseY3F8rPIYxWlDCINLlONWs7/ype0WVvHvWTRc YUyI/jPQvWdoQZSi5hpt9HYX/7SkTzlevVM3puEI/Inhp6hSAl4O5f0XIUIaJ9NgAyH4nH1Xb AKzqAmVs6N2Gk+SbnvVQIgTiOxKQaLMs/nMI+205fOXa4XMxGsJa4bb64e2kFUXzNKZ8HbJeR pnWDkJYOIyiei7egHGwy3UmrbNszVJAX+p/GrfXcPu4A2w8jgZkv0FdcHOPLWA3W1jvggO62q dSkI0SI6cFCkXX6UjiCcZykYLQbMTYJkfaJYJ7qdBgAxJeUYrYlYam2FIVxShAqv8vzZh9TmK AylcTIQ7JSULpW1LRmYotM= Received-SPF: none client-ip=212.227.126.130; envelope-from=laurent@vivier.eu; helo=mout.kundenserver.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Richard Henderson , Laurent Vivier Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Richard Henderson Use bit masking instead of an if tree. Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell Message-Id: <20210423165413.338259-5-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier --- linux-user/arm/cpu_loop.c | 50 ++++++++++++++------------------------- 1 file changed, 18 insertions(+), 32 deletions(-) diff --git a/linux-user/arm/cpu_loop.c b/linux-user/arm/cpu_loop.c index 5f61d25717c3..69632d15be18 100644 --- a/linux-user/arm/cpu_loop.c +++ b/linux-user/arm/cpu_loop.c @@ -228,6 +228,7 @@ static bool emulate_arm_fpa11(CPUARMState *env, uint32_t opcode) { TaskState *ts = env_cpu(env)->opaque; int rc = EmulateAll(opcode, &ts->fpa, env); + int raise, enabled; if (rc == 0) { /* Illegal instruction */ @@ -240,28 +241,31 @@ static bool emulate_arm_fpa11(CPUARMState *env, uint32_t opcode) } /* FP exception */ - int arm_fpe = 0; + rc = -rc; + raise = 0; /* Translate softfloat flags to FPSR flags */ - if (-rc & float_flag_invalid) { - arm_fpe |= BIT_IOC; + if (rc & float_flag_invalid) { + raise |= BIT_IOC; } - if (-rc & float_flag_divbyzero) { - arm_fpe |= BIT_DZC; + if (rc & float_flag_divbyzero) { + raise |= BIT_DZC; } - if (-rc & float_flag_overflow) { - arm_fpe |= BIT_OFC; + if (rc & float_flag_overflow) { + raise |= BIT_OFC; } - if (-rc & float_flag_underflow) { - arm_fpe |= BIT_UFC; + if (rc & float_flag_underflow) { + raise |= BIT_UFC; } - if (-rc & float_flag_inexact) { - arm_fpe |= BIT_IXC; + if (rc & float_flag_inexact) { + raise |= BIT_IXC; } - /* Exception enabled? */ - FPSR fpsr = ts->fpa.fpsr; - if (fpsr & (arm_fpe << 16)) { + /* Accumulate unenabled exceptions */ + enabled = ts->fpa.fpsr >> 16; + ts->fpa.fpsr |= raise & ~enabled; + + if (raise & enabled) { target_siginfo_t info = { }; /* @@ -275,24 +279,6 @@ static bool emulate_arm_fpa11(CPUARMState *env, uint32_t opcode) } else { env->regs[15] += 4; } - - /* Accumulate unenabled exceptions */ - if ((!(fpsr & BIT_IXE)) && (arm_fpe & BIT_IXC)) { - fpsr |= BIT_IXC; - } - if ((!(fpsr & BIT_UFE)) && (arm_fpe & BIT_UFC)) { - fpsr |= BIT_UFC; - } - if ((!(fpsr & BIT_OFE)) && (arm_fpe & BIT_OFC)) { - fpsr |= BIT_OFC; - } - if ((!(fpsr & BIT_DZE)) && (arm_fpe & BIT_DZC)) { - fpsr |= BIT_DZC; - } - if ((!(fpsr & BIT_IOE)) && (arm_fpe & BIT_IOC)) { - fpsr |= BIT_IOC; - } - ts->fpa.fpsr = fpsr; return true; } -- 2.31.1