diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/Runtime/common/math/gcc/divmoddi4.c | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Runtime/common/math/gcc/divmoddi4.c')
-rw-r--r-- | src/VBox/Runtime/common/math/gcc/divmoddi4.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/math/gcc/divmoddi4.c b/src/VBox/Runtime/common/math/gcc/divmoddi4.c new file mode 100644 index 00000000..c85498d3 --- /dev/null +++ b/src/VBox/Runtime/common/math/gcc/divmoddi4.c @@ -0,0 +1,84 @@ +/* $Id: divmoddi4.c $ */ +/** @file + * IPRT - __divmoddi4 implementation + */ + +/* + * Copyright (C) 2006-2023 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + +#include <iprt/stdint.h> +#include <iprt/uint64.h> + +int64_t __divmoddi4(int64_t i64A, int64_t i64B, int64_t *pi64R); +uint64_t __udivmoddi4(uint64_t u64A, uint64_t u64B, uint64_t *pu64R); + +/** + * __divmoddi4() implementation to satisfy external references from 32-bit code + * generated by gcc-7 or later (more likely with gcc-11). + * + * @param i64A The divident value. + * @param i64B The divisor value. + * @param pi64R A pointer to the reminder. May be NULL. + * @returns i64A / i64B + */ +int64_t __divmoddi4(int64_t i64A, int64_t i64B, int64_t *pi64R) +{ + int64_t i64Ret; + if (i64A >= 0) + { + /* Dividing two non-negative numbers is the same as unsigned division. */ + if (i64B >= 0) + i64Ret = (int64_t)__udivmoddi4((uint64_t)i64A, (uint64_t)i64B, (uint64_t *)pi64R); + /* Dividing a non-negative number by a negative one yields a negative + result and positive remainder. */ + else + i64Ret = -(int64_t)__udivmoddi4((uint64_t)i64A, (uint64_t)-i64B, (uint64_t *)pi64R); + } + else + { + uint64_t u64R; + + /* Dividing a negative number by a non-negative one yields a negative + result and negative remainder. */ + if (i64B >= 0) + i64Ret = -(int64_t)__udivmoddi4((uint64_t)-i64A, (uint64_t)i64B, &u64R); + /* Dividing two negative numbers yields a positive result and a + negative remainder. */ + else + i64Ret = (int64_t)__udivmoddi4((uint64_t)-i64A, (uint64_t)-i64B, &u64R); + + if (pi64R) + *pi64R = -(int64_t)u64R; + } + + return i64Ret; +} + |