From patchwork Thu Nov 18 13:25:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Mateus Martins Araujo e Castro X-Patchwork-Id: 12627033 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6A632C433F5 for ; Thu, 18 Nov 2021 13:40:12 +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 0B83F617E3 for ; Thu, 18 Nov 2021 13:40:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 0B83F617E3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=eldorado.org.br Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:57714 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mnhe6-0001h9-Sx for qemu-devel@archiver.kernel.org; Thu, 18 Nov 2021 08:40:10 -0500 Received: from eggs.gnu.org ([209.51.188.92]:54152) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mnhPt-0001BU-Vz; Thu, 18 Nov 2021 08:25:30 -0500 Received: from [201.28.113.2] (port=22122 helo=outlook.eldorado.org.br) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mnhPs-0000gy-2E; Thu, 18 Nov 2021 08:25:29 -0500 Received: from power9a ([10.10.71.235]) by outlook.eldorado.org.br with Microsoft SMTPSVC(8.5.9600.16384); Thu, 18 Nov 2021 10:25:10 -0300 Received: from eldorado.org.br (unknown [10.10.71.29]) by power9a (Postfix) with ESMTP id C1B3E800B36; Thu, 18 Nov 2021 10:25:10 -0300 (-03) From: "Lucas Mateus Castro (alqotel)" To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org Subject: [PATCH v2 3/3] test/tcg/ppc64le: test mtfsf Date: Thu, 18 Nov 2021 10:25:02 -0300 Message-Id: <20211118132502.984059-4-lucas.araujo@eldorado.org.br> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211118132502.984059-1-lucas.araujo@eldorado.org.br> References: <20211118132502.984059-1-lucas.araujo@eldorado.org.br> MIME-Version: 1.0 X-OriginalArrivalTime: 18 Nov 2021 13:25:10.0910 (UTC) FILETIME=[B65B19E0:01D7DC7F] X-Host-Lookup-Failed: Reverse DNS lookup failed for 201.28.113.2 (failed) Received-SPF: pass client-ip=201.28.113.2; envelope-from=lucas.araujo@eldorado.org.br; helo=outlook.eldorado.org.br X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, PDS_HP_HELO_NORDNS=0.001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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: , Cc: richard.henderson@linaro.org, danielhb413@gmail.com, mark.cave-ayland@ilande.co.uk, "Lucas Mateus Castro \(alqotel\)" , pc@us.ibm.com, david@gibson.dropbear.id.au, matheus.ferst@eldorado.org.br, clg@kaod.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Added tests for the mtfsf to check if FI bit of FPSCR is being set and if exception calls are being made correctly. Signed-off-by: Lucas Mateus Castro (alqotel) Reviewed-by: Richard Henderson --- tests/tcg/ppc64/Makefile.target | 1 + tests/tcg/ppc64le/Makefile.target | 1 + tests/tcg/ppc64le/mtfsf.c | 56 +++++++++++++++++++++++++++++++ 3 files changed, 58 insertions(+) create mode 100644 tests/tcg/ppc64le/mtfsf.c diff --git a/tests/tcg/ppc64/Makefile.target b/tests/tcg/ppc64/Makefile.target index 6ab7934fdf..8f4c7ac4ed 100644 --- a/tests/tcg/ppc64/Makefile.target +++ b/tests/tcg/ppc64/Makefile.target @@ -11,6 +11,7 @@ endif bcdsub: CFLAGS += -mpower8-vector PPC64_TESTS += byte_reverse +PPC64_TESTS += mtfsf ifneq ($(DOCKER_IMAGE)$(CROSS_CC_HAS_POWER10),) run-byte_reverse: QEMU_OPTS+=-cpu POWER10 run-plugin-byte_reverse-with-%: QEMU_OPTS+=-cpu POWER10 diff --git a/tests/tcg/ppc64le/Makefile.target b/tests/tcg/ppc64le/Makefile.target index 5e65b1590d..b8cd9bf73a 100644 --- a/tests/tcg/ppc64le/Makefile.target +++ b/tests/tcg/ppc64le/Makefile.target @@ -10,6 +10,7 @@ endif bcdsub: CFLAGS += -mpower8-vector PPC64LE_TESTS += byte_reverse +PPC64LE_TESTS += mtfsf ifneq ($(DOCKER_IMAGE)$(CROSS_CC_HAS_POWER10),) run-byte_reverse: QEMU_OPTS+=-cpu POWER10 run-plugin-byte_reverse-with-%: QEMU_OPTS+=-cpu POWER10 diff --git a/tests/tcg/ppc64le/mtfsf.c b/tests/tcg/ppc64le/mtfsf.c new file mode 100644 index 0000000000..9b3290d94c --- /dev/null +++ b/tests/tcg/ppc64le/mtfsf.c @@ -0,0 +1,56 @@ +#include +#include +#include +#include + +#define FPSCR_VE 7 /* Floating-point invalid operation exception enable */ +#define FPSCR_VXSOFT 10 /* Floating-point invalid operation exception (soft) */ +#define FPSCR_FI 17 /* Floating-point fraction inexact */ + +#define FP_VE (1ull << FPSCR_VE) +#define FP_VXSOFT (1ull << FPSCR_VXSOFT) +#define FP_FI (1ull << FPSCR_FI) + +void sigfpe_handler(int sig, siginfo_t *si, void *ucontext) +{ + exit(0); +} + +int main(void) +{ + union { + double d; + long long ll; + } fpscr; + + struct sigaction sa = { + .sa_sigaction = sigfpe_handler, + .sa_flags = SA_SIGINFO + }; + + /* + * Enable the MSR bits F0 and F1 to enable exceptions. + * This shouldn't be needed in linux-user as these bits are enabled by + * default, but this allows to execute either in a VM or a real machine + * to compare the behaviors. + */ + prctl(PR_SET_FPEXC, PR_FP_EXC_PRECISE); + + /* First test if the FI bit is being set correctly */ + fpscr.ll = FP_FI; + __builtin_mtfsf(0b11111111, fpscr.d); + fpscr.d = __builtin_mffs(); + assert((fpscr.ll & FP_FI) != 0); + + /* Then test if the deferred exception is being called correctly */ + sigaction(SIGFPE, &sa, NULL); + + /* + * Although the VXSOFT exception has been chosen, based on test in a Power9 + * any combination of exception bit + its enabling bit should work. + */ + fpscr.ll = FP_VE | FP_VXSOFT; + __builtin_mtfsf(0b11111111, fpscr.d); + + return 1; +}