1 | /* $Id: tstRTMath.cpp 67338 2017-06-12 11:33:15Z vboxsync $ */
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2 | /** @file
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3 | * IPRT Testcase - base mathematics.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2017 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | *
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17 | * The contents of this file may alternatively be used under the terms
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18 | * of the Common Development and Distribution License Version 1.0
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19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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20 | * VirtualBox OSE distribution, in which case the provisions of the
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21 | * CDDL are applicable instead of those of the GPL.
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22 | *
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23 | * You may elect to license modified versions of this file under the
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24 | * terms and conditions of either the GPL or the CDDL or both.
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25 | */
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26 |
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27 | #include <iprt/test.h>
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28 |
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29 | RT_C_DECLS_BEGIN
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30 | extern uint64_t __udivmoddi4(uint64_t u64A, uint64_t u64B, uint64_t *pu64R);
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31 | RT_C_DECLS_END
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32 |
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33 | static struct {
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34 | uint64_t u64A;
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35 | uint64_t u64B;
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36 | uint64_t u64Div;
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37 | uint64_t u64Rem;
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38 | } gUDivMod[]
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39 | =
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40 | {
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41 | { 10, 5, 2, 0 },
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42 | { (uint64_t)-10, (uint64_t)-5, 0, (uint64_t)-10 },
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43 | { UINT64_C(0x7FFFFFFFFFFFFFFF), 1, UINT64_C(0x7FFFFFFFFFFFFFFF), 0 },
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44 | { UINT64_C(0x7FFFFFFFFFFFFFFF), UINT64_C(0x7FFFFFFFFFFFFFFF), 1, 0 },
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45 | { UINT64_C(0xFFFFFFFFFFFFFFFF), 2, UINT64_C(0x7FFFFFFFFFFFFFFF), 1 },
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46 | { 1, 2, 0, 1 },
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47 | { UINT64_C(0xFFFFFFFFFFFFFFFE), UINT64_C(0xFFFFFFFFFFFFFFFF), 0, UINT64_C(0xFFFFFFFFFFFFFFFE) },
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48 | { UINT64_C(0xEEEEEEEE12345678), UINT64_C(0x00000000EEEEEEEE), 0x100000000, 0x12345678 },
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49 | };
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50 |
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51 | static void tstCorrectness(RTTEST hTest)
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52 | {
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53 | RTTestSub(hTest, "Correctness");
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54 |
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55 | uint64_t u64Rem;
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56 | for (unsigned i = 0; i < RT_ELEMENTS(gUDivMod); i++)
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57 | RTTEST_CHECK(hTest, __udivmoddi4(gUDivMod[i].u64A, gUDivMod[i].u64B, &u64Rem) == gUDivMod[i].u64Div && u64Rem == gUDivMod[i].u64Rem);
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58 | }
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59 |
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60 | int main()
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61 | {
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62 | RTTEST hTest;
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63 | int rc = RTTestInitAndCreate("tstRTMath", &hTest);
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64 | if (rc)
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65 | return rc;
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66 | RTTestBanner(hTest);
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67 |
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68 | tstCorrectness(hTest);
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69 |
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70 | return RTTestSummaryAndDestroy(hTest);
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71 | }
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