Runtime/testcase/tstRTBitOperations.cpp

/* $Id$ */
/** @file
 * IPRT Testcase - Inlined Bit Operations.
 */

/*
 * Copyright (C) 2006-2011 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.h>

#include <iprt/initterm.h>
#include <iprt/stream.h>
#include <iprt/string.h>
#include <iprt/test.h>


/*
 * Test 2 - ID allocation using a bitmap.
 */

#define NIL_TEST2_ID    0
#define TEST2_ID_LAST   ((RT_BIT_32(28) - 1) >> 8)

struct TestMap2
{
    uint32_t    idNil;
    uint32_t    idLast;
    uint32_t    idChunkPrev;
    uint32_t    bmChunkId[(TEST2_ID_LAST + 1 + 31) / 32];
};

static uint32_t test2AllocId(struct TestMap2 *p2)
{
    /*
     * Scan sequentially from the last one + 1.
     */
    int32_t idChunk = ++p2->idChunkPrev;
    if (    (uint32_t)idChunk < TEST2_ID_LAST
        &&  idChunk > NIL_TEST2_ID)
    {
        idChunk = ASMBitNextClear(&p2->bmChunkId[0], TEST2_ID_LAST + 1, idChunk);
        if (idChunk > NIL_TEST2_ID)
        {
            if (ASMAtomicBitTestAndSet(&p2->bmChunkId[0], idChunk))
            {
                RTTestFailed(NIL_RTTEST, "line %d: idChunk=%#x", __LINE__, idChunk);
                return NIL_TEST2_ID;
            }
            return p2->idChunkPrev = idChunk;
        }
    }

    /*
     * Ok, scan from the start.
     */
    idChunk = ASMBitFirstClear(&p2->bmChunkId[0], TEST2_ID_LAST + 1);
    if (idChunk <= NIL_TEST2_ID)
    {
        RTTestFailed(NIL_RTTEST, "line %d: idChunk=%#x", __LINE__, idChunk);
        return NIL_TEST2_ID;
    }
    if (ASMAtomicBitTestAndSet(&p2->bmChunkId[0], idChunk))
    {
        RTTestFailed(NIL_RTTEST, "line %d: idChunk=%#x", __LINE__, idChunk);
        return NIL_TEST2_ID;
    }

    return p2->idChunkPrev = idChunk;
}


static void test2(RTTEST hTest)
{
    struct TestMap2 *p2 = (struct TestMap2 *)RTTestGuardedAllocTail(hTest, sizeof(TestMap2));
    p2->idNil  = NIL_TEST2_ID;
    p2->idLast = TEST2_ID_LAST;

    /* Some simple tests first. */
    RT_ZERO(p2->bmChunkId);
    RTTEST_CHECK(hTest, ASMBitFirstSet(&p2->bmChunkId[0], TEST2_ID_LAST + 1) == -1);
    for (uint32_t iBit = 0; iBit <= TEST2_ID_LAST; iBit++)
        RTTEST_CHECK(hTest, !ASMBitTest(&p2->bmChunkId[0], iBit));

    memset(&p2->bmChunkId[0], 0xff, sizeof(p2->bmChunkId));
    RTTEST_CHECK(hTest, ASMBitFirstClear(&p2->bmChunkId[0], TEST2_ID_LAST + 1) == -1);
    for (uint32_t iBit = 0; iBit <= TEST2_ID_LAST; iBit++)
        RTTEST_CHECK(hTest, ASMBitTest(&p2->bmChunkId[0], iBit));

    /* The real test. */
    p2->idChunkPrev = 0;
    RT_ZERO(p2->bmChunkId);
    ASMBitSet(p2->bmChunkId, NIL_TEST2_ID);
    uint32_t cLeft = TEST2_ID_LAST;
    while (cLeft-- > 0)
        test2AllocId(p2);

    RTTEST_CHECK(hTest, ASMBitFirstClear(&p2->bmChunkId[0], TEST2_ID_LAST + 1) == -1);
}


int main()
{
    /*
     * Init the runtime and stuff.
     */
    RTTEST hTest;
    int rc = RTTestInitAndCreate("tstRTBitOperations", &hTest);
    if (rc)
        return rc;
    RTTestBanner(hTest);

    int i;
    int j;
    int k;

    /*
     * Tests
     */
    struct TestMap
    {
        uint32_t au32[4];
    };
#if 0
    struct TestMap sTest;
    struct TestMap *p = &sTest;
#else
    struct TestMap *p = (struct TestMap *)RTTestGuardedAllocTail(hTest, sizeof(*p));
#endif
#define DUMP()          RTTestPrintf(hTest, RTTESTLVL_INFO, "au32={%08x,%08x,%08x,%08x}", p->au32[0], p->au32[1], p->au32[2], p->au32[3])
#define CHECK(expr)     do { if (!(expr)) { RTTestFailed(hTest, "line %d: %s", __LINE__, #expr); DUMP(); } CHECK_GUARD(s); } while (0)
#define CHECK_BIT(expr,  b1)            do { if (!(expr)) { RTTestFailed(hTest, "line %d, b1=%d: %s", __LINE__, b1, #expr); } CHECK_GUARD(s); } while (0)
#define CHECK_BIT2(expr, b1, b2)        do { if (!(expr)) { RTTestFailed(hTest, "line %d, b1=%d b2=%d: %s", __LINE__, b1, b2, #expr); } CHECK_GUARD(s); } while (0)
#define CHECK_BIT3(expr, b1, b2, b3)    do { if (!(expr)) { RTTestFailed(hTest, "line %d, b1=%d b2=%d b3=%d: %s", __LINE__, b1, b2, b3, #expr); } CHECK_GUARD(s); } while (0)

#define GUARD_MAP(p)    do {  } while (0)
#define CHECK_GUARD(p)  do {  } while (0)
#define MAP_CLEAR(p)    do { RT_ZERO(*(p)); GUARD_MAP(p); } while (0)
#define MAP_SET(p)      do { memset(p, 0xff, sizeof(*(p))); GUARD_MAP(p); } while (0)

    /* self check. */
    MAP_CLEAR(p);
    CHECK_GUARD(p);

    /* set */
    MAP_CLEAR(p);
    ASMBitSet(&p->au32[0], 0);
    ASMBitSet(&p->au32[0], 31);
    ASMBitSet(&p->au32[0], 65);
    CHECK(p->au32[0] == 0x80000001U);
    CHECK(p->au32[2] == 0x00000002U);
    CHECK(ASMBitTestAndSet(&p->au32[0], 0)   && p->au32[0] == 0x80000001U);
    CHECK(!ASMBitTestAndSet(&p->au32[0], 16) && p->au32[0] == 0x80010001U);
    CHECK(ASMBitTestAndSet(&p->au32[0], 16)  && p->au32[0] == 0x80010001U);
    CHECK(!ASMBitTestAndSet(&p->au32[0], 80) && p->au32[2] == 0x00010002U);

    MAP_CLEAR(p);
    ASMAtomicBitSet(&p->au32[0], 0);
    ASMAtomicBitSet(&p->au32[0], 30);
    ASMAtomicBitSet(&p->au32[0], 64);
    CHECK(p->au32[0] == 0x40000001U);
    CHECK(p->au32[2] == 0x00000001U);
    CHECK(ASMAtomicBitTestAndSet(&p->au32[0], 0)   && p->au32[0] == 0x40000001U);
    CHECK(!ASMAtomicBitTestAndSet(&p->au32[0], 16) && p->au32[0] == 0x40010001U);
    CHECK(ASMAtomicBitTestAndSet(&p->au32[0], 16)  && p->au32[0] == 0x40010001U);
    CHECK(!ASMAtomicBitTestAndSet(&p->au32[0], 80) && p->au32[2] == 0x00010001U);

    /* clear */
    MAP_SET(p);
    ASMBitClear(&p->au32[0], 0);
    ASMBitClear(&p->au32[0], 31);
    ASMBitClear(&p->au32[0], 65);
    CHECK(p->au32[0] == ~0x80000001U);
    CHECK(p->au32[2] == ~0x00000002U);
    CHECK(!ASMBitTestAndClear(&p->au32[0], 0)   && p->au32[0] == ~0x80000001U);
    CHECK(ASMBitTestAndClear(&p->au32[0], 16)   && p->au32[0] == ~0x80010001U);
    CHECK(!ASMBitTestAndClear(&p->au32[0], 16)  && p->au32[0] == ~0x80010001U);
    CHECK(ASMBitTestAndClear(&p->au32[0], 80)   && p->au32[2] == ~0x00010002U);

    MAP_SET(p);
    ASMAtomicBitClear(&p->au32[0], 0);
    ASMAtomicBitClear(&p->au32[0], 30);
    ASMAtomicBitClear(&p->au32[0], 64);
    CHECK(p->au32[0] == ~0x40000001U);
    CHECK(p->au32[2] == ~0x00000001U);
    CHECK(!ASMAtomicBitTestAndClear(&p->au32[0], 0)   && p->au32[0] == ~0x40000001U);
    CHECK(ASMAtomicBitTestAndClear(&p->au32[0], 16)   && p->au32[0] == ~0x40010001U);
    CHECK(!ASMAtomicBitTestAndClear(&p->au32[0], 16)  && p->au32[0] == ~0x40010001U);
    CHECK(ASMAtomicBitTestAndClear(&p->au32[0], 80)   && p->au32[2] == ~0x00010001U);

    /* toggle */
    MAP_SET(p);
    ASMBitToggle(&p->au32[0], 0);
    ASMBitToggle(&p->au32[0], 31);
    ASMBitToggle(&p->au32[0], 65);
    ASMBitToggle(&p->au32[0], 47);
    ASMBitToggle(&p->au32[0], 47);
    CHECK(p->au32[0] == ~0x80000001U);
    CHECK(p->au32[2] == ~0x00000002U);
    CHECK(!ASMBitTestAndToggle(&p->au32[0], 0)   && p->au32[0] == ~0x80000000U);
    CHECK(ASMBitTestAndToggle(&p->au32[0], 0)    && p->au32[0] == ~0x80000001U);
    CHECK(ASMBitTestAndToggle(&p->au32[0], 16)   && p->au32[0] == ~0x80010001U);
    CHECK(!ASMBitTestAndToggle(&p->au32[0], 16)  && p->au32[0] == ~0x80000001U);
    CHECK(ASMBitTestAndToggle(&p->au32[0], 80)   && p->au32[2] == ~0x00010002U);

    MAP_SET(p);
    ASMAtomicBitToggle(&p->au32[0], 0);
    ASMAtomicBitToggle(&p->au32[0], 30);
    ASMAtomicBitToggle(&p->au32[0], 64);
    ASMAtomicBitToggle(&p->au32[0], 47);
    ASMAtomicBitToggle(&p->au32[0], 47);
    CHECK(p->au32[0] == ~0x40000001U);
    CHECK(p->au32[2] == ~0x00000001U);
    CHECK(!ASMAtomicBitTestAndToggle(&p->au32[0], 0)   && p->au32[0] == ~0x40000000U);
    CHECK(ASMAtomicBitTestAndToggle(&p->au32[0], 0)    && p->au32[0] == ~0x40000001U);
    CHECK(ASMAtomicBitTestAndToggle(&p->au32[0], 16)   && p->au32[0] == ~0x40010001U);
    CHECK(!ASMAtomicBitTestAndToggle(&p->au32[0], 16)  && p->au32[0] == ~0x40000001U);
    CHECK(ASMAtomicBitTestAndToggle(&p->au32[0], 80)   && p->au32[2] == ~0x00010001U);

    /* test bit. */
    for (i = 0; i < 128; i++)
    {
        MAP_SET(p);
        CHECK_BIT(ASMBitTest(&p->au32[0], i), i);
        ASMBitToggle(&p->au32[0], i);
        CHECK_BIT(!ASMBitTest(&p->au32[0], i), i);
        CHECK_BIT(!ASMBitTestAndToggle(&p->au32[0], i), i);
        CHECK_BIT(ASMBitTest(&p->au32[0], i), i);
        CHECK_BIT(ASMBitTestAndToggle(&p->au32[0], i), i);
        CHECK_BIT(!ASMBitTest(&p->au32[0], i), i);

        MAP_SET(p);
        CHECK_BIT(ASMBitTest(&p->au32[0], i), i);
        ASMAtomicBitToggle(&p->au32[0], i);
        CHECK_BIT(!ASMBitTest(&p->au32[0], i), i);
        CHECK_BIT(!ASMAtomicBitTestAndToggle(&p->au32[0], i), i);
        CHECK_BIT(ASMBitTest(&p->au32[0], i), i);
        CHECK_BIT(ASMAtomicBitTestAndToggle(&p->au32[0], i), i);
        CHECK_BIT(!ASMBitTest(&p->au32[0], i), i);
    }

    /* bit searching */
    MAP_SET(p);
    CHECK(ASMBitFirstClear(&p->au32[0], sizeof(p->au32) * 8) == -1);
    CHECK(ASMBitFirstSet(&p->au32[0], sizeof(p->au32) * 8) == 0);

    ASMBitClear(&p->au32[0], 1);
    CHECK(ASMBitFirstClear(&p->au32[0], sizeof(p->au32) * 8) == 1);
    CHECK(ASMBitFirstSet(&p->au32[0], sizeof(p->au32) * 8) == 0);

    MAP_SET(p);
    ASMBitClear(&p->au32[0], 95);
    CHECK(ASMBitFirstClear(&p->au32[0], sizeof(p->au32) * 8) == 95);
    CHECK(ASMBitFirstSet(&p->au32[0], sizeof(p->au32) * 8) == 0);

    MAP_SET(p);
    ASMBitClear(&p->au32[0], 127);
    CHECK(ASMBitFirstClear(&p->au32[0], sizeof(p->au32) * 8) == 127);
    CHECK(ASMBitFirstSet(&p->au32[0], sizeof(p->au32) * 8) == 0);
    CHECK(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, 0) == 1);
    CHECK(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, 1) == 2);
    CHECK(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, 2) == 3);


    MAP_SET(p);
    CHECK(ASMBitNextClear(&p->au32[0], sizeof(p->au32) * 8, 0) == -1);
    ASMBitClear(&p->au32[0], 32);
    CHECK(ASMBitNextClear(&p->au32[0], sizeof(p->au32) * 8, 32) == -1);
    ASMBitClear(&p->au32[0], 88);
    CHECK(ASMBitNextClear(&p->au32[0], sizeof(p->au32) * 8,  57) ==  88);

    MAP_SET(p);
    ASMBitClear(&p->au32[0], 31);
    ASMBitClear(&p->au32[0], 57);
    ASMBitClear(&p->au32[0], 88);
    ASMBitClear(&p->au32[0], 101);
    ASMBitClear(&p->au32[0], 126);
    ASMBitClear(&p->au32[0], 127);
    CHECK(ASMBitFirstClear(&p->au32[0], sizeof(p->au32) * 8) == 31);
    CHECK(ASMBitNextClear(&p->au32[0], sizeof(p->au32) * 8,  31) ==  57);
    CHECK(ASMBitNextClear(&p->au32[0], sizeof(p->au32) * 8,  57) ==  88);
    CHECK(ASMBitNextClear(&p->au32[0], sizeof(p->au32) * 8,  88) == 101);
    CHECK(ASMBitNextClear(&p->au32[0], sizeof(p->au32) * 8, 101) == 126);
    CHECK(ASMBitNextClear(&p->au32[0], sizeof(p->au32) * 8, 126) == 127);
    CHECK(ASMBitNextClear(&p->au32[0], sizeof(p->au32) * 8, 127) == -1);

    CHECK(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, 29) == 30);
    CHECK(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, 30) == 32);

    MAP_CLEAR(p);
    for (i = 1; i < 128; i++)
        CHECK_BIT(ASMBitNextClear(&p->au32[0], sizeof(p->au32) * 8, i - 1) == i, i);
    for (i = 0; i < 128; i++)
    {
        MAP_SET(p);
        ASMBitClear(&p->au32[0], i);
        CHECK_BIT(ASMBitFirstClear(&p->au32[0], sizeof(p->au32) * 8) == i, i);
        for (j = 0; j < i; j++)
            CHECK_BIT(ASMBitNextClear(&p->au32[0], sizeof(p->au32) * 8, j) == i, i);
        for (j = i; j < 128; j++)
            CHECK_BIT(ASMBitNextClear(&p->au32[0], sizeof(p->au32) * 8, j) == -1, i);
    }

    /* clear range. */
    MAP_SET(p);
    ASMBitClearRange(&p->au32, 0, 128);
    CHECK(!p->au32[0] && !p->au32[1] && !p->au32[2] && !p->au32[3]);
    for (i = 0; i < 128; i++)
    {
        for (j = i + 1; j <= 128; j++)
        {
            MAP_SET(p);
            ASMBitClearRange(&p->au32, i, j);
            for (k = 0; k < i; k++)
                CHECK_BIT3(ASMBitTest(&p->au32[0], k), i, j, k);
            for (k = i; k < j; k++)
                CHECK_BIT3(!ASMBitTest(&p->au32[0], k), i, j, k);
            for (k = j; k < 128; k++)
                CHECK_BIT3(ASMBitTest(&p->au32[0], k), i, j, k);
        }
    }

    /* searching for set bits. */
    MAP_CLEAR(p);
    CHECK(ASMBitFirstSet(&p->au32[0], sizeof(p->au32) * 8) == -1);

    ASMBitSet(&p->au32[0], 65);
    CHECK(ASMBitFirstSet(&p->au32[0], sizeof(p->au32) * 8) == 65);
    CHECK(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, 65) == -1);
    for (i = 0; i < 65; i++)
        CHECK(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, i) == 65);
    for (i = 65; i < 128; i++)
        CHECK(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, i) == -1);

    ASMBitSet(&p->au32[0], 17);
    CHECK(ASMBitFirstSet(&p->au32[0], sizeof(p->au32) * 8) == 17);
    CHECK(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, 17) == 65);
    for (i = 0; i < 16; i++)
        CHECK(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, i) == 17);
    for (i = 17; i < 65; i++)
        CHECK(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, i) == 65);

    MAP_SET(p);
    for (i = 1; i < 128; i++)
        CHECK_BIT(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, i - 1) == i, i);
    for (i = 0; i < 128; i++)
    {
        MAP_CLEAR(p);
        ASMBitSet(&p->au32[0], i);
        CHECK_BIT(ASMBitFirstSet(&p->au32[0], sizeof(p->au32) * 8) == i, i);
        for (j = 0; j < i; j++)
            CHECK_BIT(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, j) == i, i);
        for (j = i; j < 128; j++)
            CHECK_BIT(ASMBitNextSet(&p->au32[0], sizeof(p->au32) * 8, j) == -1, i);
    }


    CHECK(ASMBitLastSetU32(0) == 0);
    CHECK(ASMBitLastSetU32(1) == 1);
    CHECK(ASMBitLastSetU32(0x80000000) == 32);
    CHECK(ASMBitLastSetU32(0xffffffff) == 32);
    CHECK(ASMBitLastSetU32(RT_BIT(23) | RT_BIT(11)) == 24);
    for (i = 0; i < 32; i++)
        CHECK(ASMBitLastSetU32(1 << i) == (unsigned)i + 1);

    CHECK(ASMBitFirstSetU32(0) == 0);
    CHECK(ASMBitFirstSetU32(1) == 1);
    CHECK(ASMBitFirstSetU32(0x80000000) == 32);
    CHECK(ASMBitFirstSetU32(0xffffffff) == 1);
    CHECK(ASMBitFirstSetU32(RT_BIT(23) | RT_BIT(11)) == 12);
    for (i = 0; i < 32; i++)
        CHECK(ASMBitFirstSetU32(1 << i) == (unsigned)i + 1);

    /*
     * Special tests.
     */
    test2(hTest);

    /*
     * Summary
     */
    return RTTestSummaryAndDestroy(hTest);
}