From patchwork Sun Jul 2 20:28:11 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aurelien Jarno X-Patchwork-Id: 783236 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3x123N1mJgz9sNc for ; Mon, 3 Jul 2017 06:31:12 +1000 (AEST) Received: from localhost ([::1]:59165 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dRlWP-0003lQ-T2 for incoming@patchwork.ozlabs.org; Sun, 02 Jul 2017 16:31:09 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59474) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dRlTi-0001kg-D2 for qemu-devel@nongnu.org; Sun, 02 Jul 2017 16:28:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dRlTh-0001Gx-9w for qemu-devel@nongnu.org; Sun, 02 Jul 2017 16:28:22 -0400 Received: from hall.aurel32.net ([2001:bc8:30d7:100::1]:41556) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dRlTh-0001GJ-4L for qemu-devel@nongnu.org; Sun, 02 Jul 2017 16:28:21 -0400 Received: from [2001:bc8:30d7:120:9bb5:8936:7e6a:9e36] (helo=ohm.rr44.fr) by hall.aurel32.net with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1dRlTe-0003Gr-U8; Sun, 02 Jul 2017 22:28:19 +0200 Received: from aurel32 by ohm.rr44.fr with local (Exim 4.89) (envelope-from ) id 1dRlTe-0007FO-7W; Sun, 02 Jul 2017 22:28:18 +0200 From: Aurelien Jarno To: qemu-devel@nongnu.org Date: Sun, 2 Jul 2017 22:28:11 +0200 Message-Id: <20170702202814.27793-3-aurelien@aurel32.net> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170702202814.27793-1-aurelien@aurel32.net> References: <20170702202814.27793-1-aurelien@aurel32.net> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2001:bc8:30d7:100::1 Subject: [Qemu-devel] [PATCH v2 2/5] target/sh4: fix FPU unorderered compare 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: Bruno Haible , Aurelien Jarno Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" In case of unordered compare, the fcmp instructions should either trigger and invalid exception (if enabled) or set T=0. The existing code left it unchanged. LP: https://bugs.launchpad.net/qemu/+bug/1701821 Reported-by: Bruno Haible Signed-off-by: Aurelien Jarno --- target/sh4/op_helper.c | 28 ++++++++-------------------- 1 file changed, 8 insertions(+), 20 deletions(-) diff --git a/target/sh4/op_helper.c b/target/sh4/op_helper.c index 5e3a3ba68c..f228daf125 100644 --- a/target/sh4/op_helper.c +++ b/target/sh4/op_helper.c @@ -274,11 +274,8 @@ void helper_fcmp_eq_FT(CPUSH4State *env, float32 t0, float32 t1) set_float_exception_flags(0, &env->fp_status); relation = float32_compare(t0, t1, &env->fp_status); - if (unlikely(relation == float_relation_unordered)) { - update_fpscr(env, GETPC()); - } else { - env->sr_t = (relation == float_relation_equal); - } + update_fpscr(env, GETPC()); + env->sr_t = (relation == float_relation_equal); } void helper_fcmp_eq_DT(CPUSH4State *env, float64 t0, float64 t1) @@ -287,11 +284,8 @@ void helper_fcmp_eq_DT(CPUSH4State *env, float64 t0, float64 t1) set_float_exception_flags(0, &env->fp_status); relation = float64_compare(t0, t1, &env->fp_status); - if (unlikely(relation == float_relation_unordered)) { - update_fpscr(env, GETPC()); - } else { - env->sr_t = (relation == float_relation_equal); - } + update_fpscr(env, GETPC()); + env->sr_t = (relation == float_relation_equal); } void helper_fcmp_gt_FT(CPUSH4State *env, float32 t0, float32 t1) @@ -300,11 +294,8 @@ void helper_fcmp_gt_FT(CPUSH4State *env, float32 t0, float32 t1) set_float_exception_flags(0, &env->fp_status); relation = float32_compare(t0, t1, &env->fp_status); - if (unlikely(relation == float_relation_unordered)) { - update_fpscr(env, GETPC()); - } else { - env->sr_t = (relation == float_relation_greater); - } + update_fpscr(env, GETPC()); + env->sr_t = (relation == float_relation_greater); } void helper_fcmp_gt_DT(CPUSH4State *env, float64 t0, float64 t1) @@ -313,11 +304,8 @@ void helper_fcmp_gt_DT(CPUSH4State *env, float64 t0, float64 t1) set_float_exception_flags(0, &env->fp_status); relation = float64_compare(t0, t1, &env->fp_status); - if (unlikely(relation == float_relation_unordered)) { - update_fpscr(env, GETPC()); - } else { - env->sr_t = (relation == float_relation_greater); - } + update_fpscr(env, GETPC()); + env->sr_t = (relation == float_relation_greater); } float64 helper_fcnvsd_FT_DT(CPUSH4State *env, float32 t0)