From f215e02bf85f68d3a6106c2a1f4f7f063f819064 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:17:27 +0200 Subject: Adding upstream version 7.0.14-dfsg. Signed-off-by: Daniel Baumann --- .../Runtime/common/math/watcom/U8M-I8M-x86-32.asm | 87 ++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 src/VBox/Runtime/common/math/watcom/U8M-I8M-x86-32.asm (limited to 'src/VBox/Runtime/common/math/watcom/U8M-I8M-x86-32.asm') diff --git a/src/VBox/Runtime/common/math/watcom/U8M-I8M-x86-32.asm b/src/VBox/Runtime/common/math/watcom/U8M-I8M-x86-32.asm new file mode 100644 index 00000000..3b01cd5c --- /dev/null +++ b/src/VBox/Runtime/common/math/watcom/U8M-I8M-x86-32.asm @@ -0,0 +1,87 @@ +; $Id: U8M-I8M-x86-32.asm $ +;; @file +; BS3Kit - 32-bit Watcom C/C++, 64-bit unsigned integer division. +; + +; +; Copyright (C) 2007-2023 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 . +; +; 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/asmdefs.mac" + + +BEGINCODE + + +;; +; 64-bit signed & unsigned integer multiplication. +; +; @returns EDX:EAX product +; @param EDX:EAX Factor #1. +; @param ECX:EBX Factor #2. +; @uses ECX, EBX +; +global __U8M +__U8M: +global __I8M +__I8M: + ; + ; See if this is a pure 32-bit multiplication. We might get lucky. + ; + test edx, edx + jnz .complicated + test ecx, ecx + jnz .complicated + + mul ebx ; eax * ebx -> edx:eax + ret + +.complicated: + push eax + push edx + + ; ecx = F1.lo * F2.hi (edx contains overflow here can be ignored) + mul ecx + mov ecx, eax + + ; ecx += F1.hi * F2.lo (edx can be ignored again) + pop eax + mul ebx + add ecx, eax + + ; edx:eax = F1.lo * F2.lo + pop eax + mul ebx + + ; Add ecx to the high part (edx). + add edx, ecx + + ret + -- cgit v1.2.3