From patchwork Thu Sep 28 08:52:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bastian Koppelmann X-Patchwork-Id: 13402303 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 02248CE7B0E for ; Thu, 28 Sep 2023 08:54:35 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qlmm1-0006XD-OD; Thu, 28 Sep 2023 04:53:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qlmlx-0006Vv-MF for qemu-devel@nongnu.org; Thu, 28 Sep 2023 04:53:27 -0400 Received: from zuban.uni-paderborn.de ([2001:638:502:c003::17]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qlmlu-0004vF-Gu for qemu-devel@nongnu.org; Thu, 28 Sep 2023 04:53:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mail.uni-paderborn.de; s=20170601; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=0ZVKuipTJZZwnR/JF/GcM77eIVDauUJCXY9qIu7SUNg=; b=KbD59UfhxvzhqrtMBH5+6DUlEP fns+Jc2uXCP2NVYTOxYfRN5CsZxAPMxn/9f8yNeavnnvBrCeUwL6X7C/N8Gb5NbVqmhPmqxhgYv1G 5gEinOYko4/hob1EgQqatW2GWwZnnbff8Fgi+0zOHc6nVlC1xcSj9APdehJlkjn86CUQ=; X-Envelope-From: From: Bastian Koppelmann To: qemu-devel@nongnu.org Cc: kbastian@mail.uni-paderborn.de, Richard Henderson Subject: [PULL v2 03/21] target/tricore: Correctly handle FPU RM from PSW Date: Thu, 28 Sep 2023 10:52:45 +0200 Message-ID: <20230928085303.511518-4-kbastian@mail.uni-paderborn.de> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230928085303.511518-1-kbastian@mail.uni-paderborn.de> References: <20230928085303.511518-1-kbastian@mail.uni-paderborn.de> MIME-Version: 1.0 X-IMT-spamd-action: no action X-PMX-Version: 6.4.9.2830568, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2023.9.28.84518, AntiVirus-Engine: 6.0.2, AntiVirus-Data: 2023.9.26.602000 X-IMT-Source: Intern X-IMT-Spam-Score: 0.0 () X-IMT-Authenticated-Sender: uid=kbastian,ou=People,o=upb,c=de Received-SPF: pass client-ip=2001:638:502:c003::17; envelope-from=kbastian@mail.uni-paderborn.de; helo=zuban.uni-paderborn.de X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org when we reconstructed PSW using psw_read(), we were trying to clear the cached USB bits out of env->PSW. The mask was wrong and we would clear PSW.RM as well. when we write the PSW using psw_write() we update the rounding modes in env->fp_status for softfloat. The order of bits used by TriCore is not the one used by softfloat. Reviewed-by: Richard Henderson Signed-off-by: Bastian Koppelmann Message-ID: <20230828112651.522058-4-kbastian@mail.uni-paderborn.de> --- target/tricore/helper.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/target/tricore/helper.c b/target/tricore/helper.c index 6d076ac36f..e615c3d6d4 100644 --- a/target/tricore/helper.c +++ b/target/tricore/helper.c @@ -120,7 +120,21 @@ void tricore_cpu_list(void) void fpu_set_state(CPUTriCoreState *env) { - set_float_rounding_mode(env->PSW & MASK_PSW_FPU_RM, &env->fp_status); + switch (extract32(env->PSW, 24, 2)) { + case 0: + set_float_rounding_mode(float_round_nearest_even, &env->fp_status); + break; + case 1: + set_float_rounding_mode(float_round_up, &env->fp_status); + break; + case 2: + set_float_rounding_mode(float_round_down, &env->fp_status); + break; + case 3: + set_float_rounding_mode(float_round_to_zero, &env->fp_status); + break; + } + set_flush_inputs_to_zero(1, &env->fp_status); set_flush_to_zero(1, &env->fp_status); set_default_nan_mode(1, &env->fp_status); @@ -129,7 +143,7 @@ void fpu_set_state(CPUTriCoreState *env) uint32_t psw_read(CPUTriCoreState *env) { /* clear all USB bits */ - env->PSW &= 0x6ffffff; + env->PSW &= 0x7ffffff; /* now set them from the cache */ env->PSW |= ((env->PSW_USB_C != 0) << 31); env->PSW |= ((env->PSW_USB_V & (1 << 31)) >> 1);