| 1 | /* $Id: tstRTMath.cpp 93115 2022-01-01 11:31:46Z 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) 2017-2022 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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