uint32_interleave_2()

static uint64_t uint32_interleave_2 ( uint32_t  u1, uint32_t  u2  )

static

Definition at line 228 of file g_serialized.c.

References pixval::x, and pixval::y.

Referenced by gbox_get_sortable_hash(), and gserialized_cmp().

{
    uint64_t x = u1;
    uint64_t y = u2;
    int i;

    static uint64_t B[5] =
    {
        0x5555555555555555,
        0x3333333333333333,
        0x0F0F0F0F0F0F0F0F,
        0x00FF00FF00FF00FF,
        0x0000FFFF0000FFFF
    };
    static uint64_t S[5] = { 1, 2, 4, 8, 16 };

    for ( i = 4; i >= 0; i-- )
    {
        x = (x | (x << S[i])) & B[i];
        y = (y | (y << S[i])) & B[i];
    }

    return x | (y << 1);
}

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