From nobody Sun Nov 24 22:44:50 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1720127077113142.49697578773169; Thu, 4 Jul 2024 14:04:37 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sPTaV-0000Tv-I5; Thu, 04 Jul 2024 17:01:55 -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 1sPTaT-0000Jv-DJ; Thu, 04 Jul 2024 17:01:53 -0400 Received: from isrv.corpit.ru ([86.62.121.231]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sPTaR-0004Pz-Jv; Thu, 04 Jul 2024 17:01:53 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 540327756D; Fri, 5 Jul 2024 00:00:51 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id 5F375FECA6; Fri, 5 Jul 2024 00:00:56 +0300 (MSK) Received: (nullmailer pid 1507759 invoked by uid 1000); Thu, 04 Jul 2024 21:00:55 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Richard Henderson , Peter Maydell , Michael Tokarev Subject: [Stable-9.0.2 15/22] target/arm: Fix FJCVTZS vs flush-to-zero Date: Fri, 5 Jul 2024 00:00:45 +0300 Message-Id: <20240704210055.1507652-15-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=86.62.121.231; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1720127078769100003 Content-Type: text/plain; charset="utf-8" From: Richard Henderson Input denormals cause the Javascript inexact bit (output to Z) to be set. Cc: qemu-stable@nongnu.org Fixes: 6c1f6f2733a ("target/arm: Implement ARMv8.3-JSConv") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2375 Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson Message-id: 20240625183536.1672454-4-richard.henderson@linaro.org [PMM: fixed hardcoded tab in test case] Signed-off-by: Peter Maydell (cherry picked from commit 7619129f0d4a14d918227c5c47ad7433662e9ccc) Signed-off-by: Michael Tokarev diff --git a/target/arm/vfp_helper.c b/target/arm/vfp_helper.c index 3e5e37abbe..ff59bc5522 100644 --- a/target/arm/vfp_helper.c +++ b/target/arm/vfp_helper.c @@ -1121,8 +1121,8 @@ const FloatRoundMode arm_rmode_to_sf_map[] =3D { uint64_t HELPER(fjcvtzs)(float64 value, void *vstatus) { float_status *status =3D vstatus; - uint32_t inexact, frac; - uint32_t e_old, e_new; + uint32_t frac, e_old, e_new; + bool inexact; =20 e_old =3D get_float_exception_flags(status); set_float_exception_flags(0, status); @@ -1130,13 +1130,13 @@ uint64_t HELPER(fjcvtzs)(float64 value, void *vstat= us) e_new =3D get_float_exception_flags(status); set_float_exception_flags(e_old | e_new, status); =20 - if (value =3D=3D float64_chs(float64_zero)) { - /* While not inexact for IEEE FP, -0.0 is inexact for JavaScript. = */ - inexact =3D 1; - } else { - /* Normal inexact or overflow or NaN */ - inexact =3D e_new & (float_flag_inexact | float_flag_invalid); - } + /* Normal inexact, denormal with flush-to-zero, or overflow or NaN */ + inexact =3D e_new & (float_flag_inexact | + float_flag_input_denormal | + float_flag_invalid); + + /* While not inexact for IEEE FP, -0.0 is inexact for JavaScript. */ + inexact |=3D value =3D=3D float64_chs(float64_zero); =20 /* Pack the result and the env->ZF representation of Z together. */ return deposit64(frac, 32, 32, inexact); diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile= .target index 70d728ae9a..4ecbca6a41 100644 --- a/tests/tcg/aarch64/Makefile.target +++ b/tests/tcg/aarch64/Makefile.target @@ -41,8 +41,9 @@ endif =20 # Pauth Tests ifneq ($(CROSS_CC_HAS_ARMV8_3),) -AARCH64_TESTS +=3D pauth-1 pauth-2 pauth-4 pauth-5 +AARCH64_TESTS +=3D pauth-1 pauth-2 pauth-4 pauth-5 test-2375 pauth-%: CFLAGS +=3D -march=3Darmv8.3-a +test-2375: CFLAGS +=3D -march=3Darmv8.3-a run-pauth-1: QEMU_OPTS +=3D -cpu max run-pauth-2: QEMU_OPTS +=3D -cpu max # Choose a cpu with FEAT_Pauth but without FEAT_FPAC for pauth-[45]. diff --git a/tests/tcg/aarch64/test-2375.c b/tests/tcg/aarch64/test-2375.c new file mode 100644 index 0000000000..84c7e7de71 --- /dev/null +++ b/tests/tcg/aarch64/test-2375.c @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* Copyright (c) 2024 Linaro Ltd */ +/* See https://gitlab.com/qemu-project/qemu/-/issues/2375 */ + +#include + +int main(void) +{ + int r, z; + + asm("msr fpcr, %2\n\t" + "fjcvtzs %w0, %d3\n\t" + "cset %1, eq" + : "=3Dr"(r), "=3Dr"(z) + : "r"(0x01000000L), /* FZ =3D 1 */ + "w"(0xfcff00L)); /* denormal */ + + assert(r =3D=3D 0); + assert(z =3D=3D 0); + return 0; +} --=20 2.39.2