1 files changed, 56 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/asm/ASMMultU64ByU32DivByU32-generic.cpp b/src/VBox/Runtime/common/asm/ASMMultU64ByU32DivByU32-generic.cpp
new file mode 100644
index 00000000..307f3693
--- /dev/null
+++ b/src/VBox/Runtime/common/asm/ASMMultU64ByU32DivByU32-generic.cpp
@@ -0,0 +1,56 @@
+/* $Id: ASMMultU64ByU32DivByU32-generic.cpp $ */
+/** @file
+ * IPRT - ASMMultU64ByU32DivByU32 - generic C implementation.
+ */
+
+/*
+ * Copyright (C) 2006-2022 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
+ */
+
+
+/*********************************************************************************************************************************
+*   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;
+}
+