source: vbox/trunk/include/iprt/asm-math-watcom-x86-32.h

/** @file
 * IPRT - Assembly Routines for Optimizing some Integers Math Operations, x86 32-bit Watcom C/C++ pragma aux.
 */

/*
 * Copyright (C) 2006-2024 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
 */

#ifndef IPRT_INCLUDED_asm_math_watcom_x86_32_h
#define IPRT_INCLUDED_asm_math_watcom_x86_32_h
/* no pragma once */

#ifndef IPRT_INCLUDED_asm_math_h
# error "Don't include this header directly."
#endif

#ifndef __FLAT__
# error "Only works with flat pointers! (-mf)"
#endif

/*
 * Note! The #undef that preceds the #pragma aux statements is for undoing
 *       the mangling, because the symbol in #pragma aux [symbol] statements
 *       doesn't get subjected to preprocessing.  This is also why we include
 *       the watcom header at both the top and the bottom of asm.h file.
 */


#undef      ASMMult2xU32RetU64
#ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS
#pragma aux ASMMult2xU32RetU64 = \
    "mul edx" \
    parm [edx] [eax] \
    value [eax edx] \
    modify exact [eax edx];
#endif

#undef      ASMMult2xS32RetS64
#ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS
#pragma aux ASMMult2xS32RetS64 = \
    "imul edx" \
    parm [edx] [eax] \
    value [eax edx] \
    modify exact [eax edx];
#endif

#undef      ASMDivU64ByU32RetU32
#ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS
#pragma aux ASMDivU64ByU32RetU32 = \
    "div ecx" \
    parm [eax edx] [ecx] \
    value [eax] \
    modify exact [eax edx];
#endif

#undef      ASMDivS64ByS32RetS32
#ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS
#pragma aux ASMDivS64ByS32RetS32 = \
    "idiv ecx" \
    parm [eax edx] [ecx] \
    value [eax] \
    modify exact [eax edx];
#endif

#undef      ASMModU64ByU32RetU32
#ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS
#pragma aux ASMModU64ByU32RetU32 = \
    "div ecx" \
    parm [eax edx] [ecx] \
    value [edx] \
    modify exact [eax edx];
#endif

#undef      ASMModS64ByS32RetS32
#ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS
#pragma aux ASMModS64ByS32RetS32 = \
    "idiv ecx" \
    parm [eax edx] [ecx] \
    value [edx] \
    modify exact [eax edx];
#endif

#undef      ASMMultU32ByU32DivByU32
#ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS
#pragma aux ASMMultU32ByU32DivByU32 = \
    "mul edx" \
    "div ecx" \
    parm [eax] [edx] [ecx] \
    value [eax] \
    modify exact [eax edx];
#endif

/* ASMMultU64ByU32DivByU32 is implemented in assembly */

#endif /* !IPRT_INCLUDED_asm_math_watcom_x86_32_h */