1 files changed, 81 insertions, 0 deletions
diff --git a/src/VBox/Runtime/testcase/tstRTMath.cpp b/src/VBox/Runtime/testcase/tstRTMath.cpp
new file mode 100644
index 00000000..1086a318
--- /dev/null
+++ b/src/VBox/Runtime/testcase/tstRTMath.cpp
@@ -0,0 +1,81 @@
+/* $Id: tstRTMath.cpp $ */
+/** @file
+ * IPRT Testcase - base mathematics.
+ */
+
+/*
+ * Copyright (C) 2017-2023 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/test.h>
+
+RT_C_DECLS_BEGIN
+extern uint64_t __udivmoddi4(uint64_t u64A, uint64_t u64B, uint64_t *pu64R);
+RT_C_DECLS_END
+
+static struct {
+    uint64_t u64A;
+    uint64_t u64B;
+    uint64_t u64Div;
+    uint64_t u64Rem;
+} gUDivMod[]
+=
+{
+    {                           10,                            5,                            2,                            0 },
+    {                (uint64_t)-10,                 (uint64_t)-5,                            0,                (uint64_t)-10 },
+    { UINT64_C(0x7FFFFFFFFFFFFFFF),                            1, UINT64_C(0x7FFFFFFFFFFFFFFF),                            0 },
+    { UINT64_C(0x7FFFFFFFFFFFFFFF), UINT64_C(0x7FFFFFFFFFFFFFFF),                            1,                            0 },
+    { UINT64_C(0xFFFFFFFFFFFFFFFF),                            2, UINT64_C(0x7FFFFFFFFFFFFFFF),                            1 },
+    {                            1,                            2,                            0,                            1 },
+    { UINT64_C(0xFFFFFFFFFFFFFFFE), UINT64_C(0xFFFFFFFFFFFFFFFF),                            0, UINT64_C(0xFFFFFFFFFFFFFFFE) },
+    { UINT64_C(0xEEEEEEEE12345678), UINT64_C(0x00000000EEEEEEEE),                  0x100000000,                   0x12345678 },
+};
+
+static void tstCorrectness(RTTEST hTest)
+{
+    RTTestSub(hTest, "Correctness");
+
+    uint64_t u64Rem;
+    for (unsigned i = 0; i < RT_ELEMENTS(gUDivMod); i++)
+        RTTEST_CHECK(hTest, __udivmoddi4(gUDivMod[i].u64A, gUDivMod[i].u64B, &u64Rem) == gUDivMod[i].u64Div && u64Rem == gUDivMod[i].u64Rem);
+}
+
+int main()
+{
+    RTTEST hTest;
+    int rc = RTTestInitAndCreate("tstRTMath", &hTest);
+    if (rc)
+        return rc;
+    RTTestBanner(hTest);
+
+    tstCorrectness(hTest);
+
+    return RTTestSummaryAndDestroy(hTest);
+}