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#include <private/qdrawhelper_x86_p.h>

#ifdef QT_HAVE_SSE2

#include <private/qpaintengine_raster_p.h>

#ifdef QT_LINUXBASE

// this is an evil hack - the posix_memalign declaration in LSB

// is wrong - see http://bugs.linuxbase.org/show_bug.cgi?id=2431

#  define posix_memalign _lsb_hack_posix_memalign

#  include <emmintrin.h>

#  undef posix_memalign

#else

#  include <emmintrin.h>

#endif

QT_BEGIN_NAMESPACE

void qt_memfill32_sse2(quint32 *dest, quint32 value, int count)

{

    if (count < 7) {

        switch (count) {

        case 6: *dest++ = value;

        case 5: *dest++ = value;

        case 4: *dest++ = value;

        case 3: *dest++ = value;

        case 2: *dest++ = value;

        case 1: *dest   = value;

        }

        return;

    };

    const int align = (quintptr)(dest) & 0xf;

    switch (align) {

    case 4:  *dest++ = value; --count;

    case 8:  *dest++ = value; --count;

    case 12: *dest++ = value; --count;

    }

    int count128 = count / 4;

    __m128i *dst128 = reinterpret_cast<__m128i*>(dest);

    const __m128i value128 = _mm_set_epi32(value, value, value, value);

    int n = (count128 + 3) / 4;

    switch (count128 & 0x3) {

    case 0: do { _mm_store_si128(dst128++, value128);

    case 3:      _mm_store_si128(dst128++, value128);

    case 2:      _mm_store_si128(dst128++, value128);

    case 1:      _mm_store_si128(dst128++, value128);

    } while (--n > 0);

    }

    const int rest = count & 0x3;

    if (rest) {

        switch (rest) {

        case 3: dest[count - 3] = value;

        case 2: dest[count - 2] = value;

        case 1: dest[count - 1] = value;

        }

    }

}

void qt_memfill16_sse2(quint16 *dest, quint16 value, int count)

{

    if (count < 3) {

        switch (count) {

        case 2: *dest++ = value;

        case 1: *dest = value;

        }

        return;

    }

    const int align = (quintptr)(dest) & 0x3;

    switch (align) {

    case 2: *dest++ = value; --count;

    }

    const quint32 value32 = (value << 16) | value;

    qt_memfill32_sse2(reinterpret_cast<quint32*>(dest), value32, count / 2);

    if (count & 0x1)

        dest[count - 1] = value;

}

void qt_bitmapblit32_sse2(QRasterBuffer *rasterBuffer, int x, int y,

                          quint32 color,

                          const uchar *src, int width, int height, int stride)

{

    quint32 *dest = reinterpret_cast<quint32*>(rasterBuffer->scanLine(y)) + x;

    const int destStride = rasterBuffer->bytesPerLine() / sizeof(quint32);

    const __m128i c128 = _mm_set1_epi32(color);

    const __m128i maskmask1 = _mm_set_epi32(0x10101010, 0x20202020,

                                            0x40404040, 0x80808080);

    const __m128i maskadd1 = _mm_set_epi32(0x70707070, 0x60606060,

                                           0x40404040, 0x00000000);

    if (width > 4) {

        const __m128i maskmask2 = _mm_set_epi32(0x01010101, 0x02020202,

                                                0x04040404, 0x08080808);

        const __m128i maskadd2 = _mm_set_epi32(0x7f7f7f7f, 0x7e7e7e7e,

                                               0x7c7c7c7c, 0x78787878);

        while (height--) {

            for (int x = 0; x < width; x += 8) {

                const quint8 s = src[x >> 3];

                if (!s)

                    continue;

                __m128i mask1 = _mm_set1_epi8(s);

                __m128i mask2 = mask1;

                mask1 = _mm_and_si128(mask1, maskmask1);

                mask1 = _mm_add_epi8(mask1, maskadd1);

                _mm_maskmoveu_si128(c128, mask1, (char*)(dest + x));

                mask2 = _mm_and_si128(mask2, maskmask2);

                mask2 = _mm_add_epi8(mask2, maskadd2);

                _mm_maskmoveu_si128(c128, mask2, (char*)(dest + x + 4));

            }

            dest += destStride;

            src += stride;

        }

    } else {

        while (height--) {

            const quint8 s = *src;

            if (s) {

                __m128i mask1 = _mm_set1_epi8(s);

                mask1 = _mm_and_si128(mask1, maskmask1);

                mask1 = _mm_add_epi8(mask1, maskadd1);

                _mm_maskmoveu_si128(c128, mask1, (char*)(dest));

            }

            dest += destStride;

            src += stride;

        }

    }

}

void qt_bitmapblit16_sse2(QRasterBuffer *rasterBuffer, int x, int y,

                          quint32 color,

                          const uchar *src, int width, int height, int stride)

{

    const quint16 c = qt_colorConvert<quint16, quint32>(color, 0);

    quint16 *dest = reinterpret_cast<quint16*>(rasterBuffer->scanLine(y)) + x;

    const int destStride = rasterBuffer->bytesPerLine() / sizeof(quint16);

    const __m128i c128 = _mm_set1_epi16(c);

#if defined(Q_CC_MSVC)

#  pragma warning(disable: 4309) // truncation of constant value

#endif

    const __m128i maskmask = _mm_set_epi16(0x0101, 0x0202, 0x0404, 0x0808,

                                           0x1010, 0x2020, 0x4040, 0x8080);

    const __m128i maskadd = _mm_set_epi16(0x7f7f, 0x7e7e, 0x7c7c, 0x7878,

                                          0x7070, 0x6060, 0x4040, 0x0000);

    while (height--) {

        for (int x = 0; x < width; x += 8) {

            const quint8 s = src[x >> 3];

            if (!s)

                continue;

            __m128i mask = _mm_set1_epi8(s);

            mask = _mm_and_si128(mask, maskmask);

            mask = _mm_add_epi8(mask, maskadd);

            _mm_maskmoveu_si128(c128, mask, (char*)(dest + x));

        }

        dest += destStride;

        src += stride;

    }

}

QT_END_NAMESPACE

#endif // QT_HAVE_SSE2