/* $Id: ASMMultU64ByU32DivByU32-generic.cpp 93483 2022-01-28 23:19:26Z vboxsync $ */
/** @file
 * IPRT - ASMMultU64ByU32DivByU32 - generic C implementation.
 */

/*
 * Copyright (C) 2006-2022 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE 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.
 */


/*********************************************************************************************************************************
*   Header Files                                                                                                                 *
*********************************************************************************************************************************/
#include <iprt/asm-math.h>
#include "internal/iprt.h"



RTDECL(uint64_t) ASMMultU64ByU32DivByU32(uint64_t u64A, uint32_t u32B, uint32_t u32C)
{
    RTUINT64U   u;
    uint64_t    u64Lo = (uint64_t)(u64A & 0xffffffff) * u32B;
    uint64_t    u64Hi = (uint64_t)(u64A >> 32)        * u32B;
    u64Hi  += (u64Lo >> 32);
    u.s.Hi = (uint32_t)(u64Hi / u32C);
    u.s.Lo = (uint32_t)((((u64Hi % u32C) << 32) + (u64Lo & 0xffffffff)) / u32C);
    return u.u;
}