From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16D60C433ED for ; Tue, 11 May 2021 17:41:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C141E611BD for ; Tue, 11 May 2021 17:41:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231793AbhEKRmZ (ORCPT ); Tue, 11 May 2021 13:42:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36122 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231645AbhEKRmU (ORCPT ); Tue, 11 May 2021 13:42:20 -0400 Received: from mail-ed1-x529.google.com (mail-ed1-x529.google.com [IPv6:2a00:1450:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8066C061574 for ; Tue, 11 May 2021 10:41:10 -0700 (PDT) Received: by mail-ed1-x529.google.com with SMTP id g14so23891373edy.6 for ; Tue, 11 May 2021 10:41:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=pc/L6ED7H2RwZMgS4Vq0ULfZJt+L6YaroAbjkFRFCkM=; b=U8qWcXXyPWqKrOvUNouADqOJ4zKDm/LkesdC6hSrMVUslzi6hyeKiL1FR3grirLe65 x4WFnBPt4FiGWjGuoVLL+W8LU17/ns4WjCWy4fGv7pyl+N1AdvnW8UtlTCZ0ca5b87DV fzhgTUBdZI141YjqfAyZtJZFmHQ0/+uwQo68XymtgUAKFN7iBS67jarxHPVOf7awlC42 ovD3MM+ZrE85GWfvLazBNPFGiOX7qGS/J48CNqkYia/IxAKsAMNOzz/S2cIL+YQuMqPa rf55O4198Q+o/qe6VhGHtVQYEgyhyDlQW6+G0aj6W4haGP/ouHZMIcxBLKRz0KUmiExb VXMA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=pc/L6ED7H2RwZMgS4Vq0ULfZJt+L6YaroAbjkFRFCkM=; b=GkY1UI1qjoY/7iJS5W3fZZyR2aRfFLUspdFZFYENUkjTiSbGvvs/CFWiek5lCsnh5r 6hjYHOewaSBvOgmUxDa7Y97Ez5w8b4k+SQyZGCyohOzwNPQy+3Nq5h6+FKLh0t8QhPr2 1lT3SGzIlUuncWSJwvC9TjVDzeqtcRIY23myjYC5SuY372lNBgWvEt0BgfzmkHN1Mswn k94IRvDdFkgsY+IRBqzvh2uSnqwAYgtGhnkPmUAqrQC7PleQfXi1v9/OI88uwsy0mbu0 /uSq20/d55Ov2AgmGpaNe9e0EKsswshIHlxo5wYGzhXWI1RV3T3XR2COJirWTstbzPml /chg== X-Gm-Message-State: AOAM533hv+Z08tvkivWGrixd0Nvpad+2Lr988xyHkGKsOA+eVIcqyQft x+f0DDPKfcaBLFedVGfFLvIjub+oVu4= X-Google-Smtp-Source: ABdhPJxTsOCwcOqmkJUmlqKUC7+s0dEFqtklNzfXJYZCTQkGKs2Vt1Svz4KdhgivbfZIJb/3v1G8gA== X-Received: by 2002:aa7:c789:: with SMTP id n9mr38495966eds.352.1620754868887; Tue, 11 May 2021 10:41:08 -0700 (PDT) Received: from avogadro.redhat.com ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id v23sm15239073eda.8.2021.05.11.10.41.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 May 2021 10:41:08 -0700 (PDT) Sender: Paolo Bonzini From: Paolo Bonzini To: kvm@vger.kernel.org Cc: Alexandru Elisei Subject: [PATCH kvm-unit-tests 2/2] arm: add eabi version of 64-bit division functions Date: Tue, 11 May 2021 19:41:06 +0200 Message-Id: <20210511174106.703235-3-pbonzini@redhat.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210511174106.703235-1-pbonzini@redhat.com> References: <20210511174106.703235-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org eabi prescribes different entry points for 64-bit division on 32-bit platforms. Implement a wrapper for the GCC-style __divmoddi4 and __udivmoddi4 functions. Reported-by: Alexandru Elisei Signed-off-by: Paolo Bonzini --- arm/Makefile.arm | 1 + lib/arm/ldivmod.S | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 33 insertions(+) create mode 100644 lib/arm/ldivmod.S diff --git a/arm/Makefile.arm b/arm/Makefile.arm index 687a8ed..3a4cc6b 100644 --- a/arm/Makefile.arm +++ b/arm/Makefile.arm @@ -24,6 +24,7 @@ cflatobjs += lib/arm/spinlock.o cflatobjs += lib/arm/processor.o cflatobjs += lib/arm/stack.o cflatobjs += lib/ldiv32.o +cflatobjs += lib/arm/ldivmod.o # arm specific tests tests = diff --git a/lib/arm/ldivmod.S b/lib/arm/ldivmod.S new file mode 100644 index 0000000..de11ac9 --- /dev/null +++ b/lib/arm/ldivmod.S @@ -0,0 +1,32 @@ +// EABI ldivmod and uldivmod implementation based on libcompiler-rt +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. + + .syntax unified + .align 2 + .globl __aeabi_uldivmod + .type __aeabi_uldivmod, %function +__aeabi_uldivmod: + push {r11, lr} + sub sp, sp, #16 + add r12, sp, #8 + str r12, [sp] // third argument to __udivmoddi4 + bl __udivmoddi4 + ldr r2, [sp, #8] // remainder returned in r2-r3 + ldr r3, [sp, #12] + add sp, sp, #16 + pop {r11, pc} + + .globl __aeabi_ldivmod + .type __aeabi_ldivmod, %function +__aeabi_ldivmod: + push {r11, lr} + sub sp, sp, #16 + add r12, sp, #8 + str r12, [sp] // third argument to __divmoddi4 + bl __divmoddi4 + ldr r2, [sp, #8] // remainder returned in r2-r3 + ldr r3, [sp, #12] + add sp, sp, #16 + pop {r11, pc} -- 2.31.1