From nobody Thu Nov 6 10:38:55 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1540389771806375.84466287800944; Wed, 24 Oct 2018 07:02:51 -0700 (PDT) Received: from localhost ([::1]:48633 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gFJkH-0008OY-U6 for importer@patchew.org; Wed, 24 Oct 2018 10:02:49 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60232) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gFJQh-0005GC-Di for qemu-devel@nongnu.org; Wed, 24 Oct 2018 09:42:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gFJQd-00023L-3P for qemu-devel@nongnu.org; Wed, 24 Oct 2018 09:42:35 -0400 Received: from mx2.rt-rk.com ([89.216.37.149]:49962 helo=mail.rt-rk.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gFJQa-0001sp-S0 for qemu-devel@nongnu.org; Wed, 24 Oct 2018 09:42:30 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.rt-rk.com (Postfix) with ESMTP id 595731A4599; Wed, 24 Oct 2018 15:40:55 +0200 (CEST) Received: from rtrkw774-lin.domain.local (rtrkw774-lin.domain.local [10.10.13.43]) by mail.rt-rk.com (Postfix) with ESMTPSA id 0CEEB1A4585; Wed, 24 Oct 2018 15:40:55 +0200 (CEST) X-Virus-Scanned: amavisd-new at rt-rk.com From: Aleksandar Markovic To: qemu-devel@nongnu.org Date: Wed, 24 Oct 2018 15:40:42 +0200 Message-Id: <1540388447-27062-29-git-send-email-aleksandar.markovic@rt-rk.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1540388447-27062-1-git-send-email-aleksandar.markovic@rt-rk.com> References: <1540388447-27062-1-git-send-email-aleksandar.markovic@rt-rk.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 89.216.37.149 Subject: [Qemu-devel] [PULL v2 28/33] tests/tcg/mips: Add tests for R5900 DIV1 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: peter.maydell@linaro.org, amarkovic@wavecomp.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Fredrik Noring Add a test for DIV1. Reviewed-by: Aleksandar Markovic Signed-off-by: Fredrik Noring Signed-off-by: Aleksandar Markovic --- tests/tcg/mips/mipsr5900/Makefile | 3 +- tests/tcg/mips/mipsr5900/div1.c | 73 +++++++++++++++++++++++++++++++++++= ++++ 2 files changed, 75 insertions(+), 1 deletion(-) create mode 100644 tests/tcg/mips/mipsr5900/div1.c diff --git a/tests/tcg/mips/mipsr5900/Makefile b/tests/tcg/mips/mipsr5900/M= akefile index 287c248..757eb83 100644 --- a/tests/tcg/mips/mipsr5900/Makefile +++ b/tests/tcg/mips/mipsr5900/Makefile @@ -8,7 +8,8 @@ SIM_FLAGS=3D-cpu R5900 CC =3D $(CROSS)gcc CFLAGS =3D -Wall -mabi=3D32 -march=3Dr5900 -static =20 -TESTCASES =3D mflohi1.tst +TESTCASES =3D div1.tst +TESTCASES +=3D mflohi1.tst TESTCASES +=3D mtlohi1.tst TESTCASES +=3D mult.tst TESTCASES +=3D multu.tst diff --git a/tests/tcg/mips/mipsr5900/div1.c b/tests/tcg/mips/mipsr5900/div= 1.c new file mode 100644 index 0000000..83dafa0 --- /dev/null +++ b/tests/tcg/mips/mipsr5900/div1.c @@ -0,0 +1,73 @@ +/* + * Test R5900-specific DIV1. + */ + +#include +#include +#include + +struct quotient_remainder { int32_t quotient, remainder; }; + +static struct quotient_remainder div1(int32_t rs, int32_t rt) +{ + int32_t lo, hi; + + __asm__ __volatile__ ( + " div1 $0, %2, %3\n" + " mflo1 %0\n" + " mfhi1 %1\n" + : "=3Dr" (lo), "=3Dr" (hi) + : "r" (rs), "r" (rt)); + + assert(rs / rt =3D=3D lo); + assert(rs % rt =3D=3D hi); + + return (struct quotient_remainder) { .quotient =3D lo, .remainder =3D = hi }; +} + +static void verify_div1(int32_t rs, int32_t rt, + int32_t expected_quotient, + int32_t expected_remainder) +{ + struct quotient_remainder qr =3D div1(rs, rt); + + assert(qr.quotient =3D=3D expected_quotient); + assert(qr.remainder =3D=3D expected_remainder); +} + +static void verify_div1_negations(int32_t rs, int32_t rt, + int32_t expected_quotient, + int32_t expected_remainder) +{ + verify_div1(rs, rt, expected_quotient, expected_remainder); + verify_div1(rs, -rt, -expected_quotient, expected_remainder); + verify_div1(-rs, rt, -expected_quotient, -expected_remainder); + verify_div1(-rs, -rt, expected_quotient, -expected_remainder); +} + +int main() +{ + verify_div1_negations(0, 1, 0, 0); + verify_div1_negations(1, 1, 1, 0); + verify_div1_negations(1, 2, 0, 1); + verify_div1_negations(17, 19, 0, 17); + verify_div1_negations(19, 17, 1, 2); + verify_div1_negations(77773, 101, 770, 3); + + verify_div1(-0x80000000, 1, -0x80000000, 0); + + /* + * Supplementary explanation from the Toshiba TX System RISC TX79 Core + * Architecture manual, A-38 and B-7, https://wiki.qemu.org/File:C790.= pdf + * + * Normally, when 0x80000000 (-2147483648) the signed minimum value is + * divided by 0xFFFFFFFF (-1), the operation will result in an overflo= w. + * However, in this instruction an overflow exception doesn't occur and + * the result will be as follows: + * + * Quotient is 0x80000000 (-2147483648), and remainder is 0x00000000 (= 0). + */ + verify_div1(-0x80000000, -1, -0x80000000, 0); + + return 0; +} --=20 2.7.4