Long live Qt 4.5!

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diff --git a/src/gui/painting/qdrawhelper_sse_p.h b/src/gui/painting/qdrawhelper_sse_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QDRAWHELPER_SSE_P_H
+#define QDRAWHELPER_SSE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <private/qdrawhelper_mmx_p.h>
+
+#ifdef QT_HAVE_SSE
+
+#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 <xmmintrin.h>
+#  undef posix_memalign
+#else
+#  include <xmmintrin.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+#ifndef _MM_SHUFFLE
+#define _MM_SHUFFLE(fp3,fp2,fp1,fp0) \
+ (((fp3) << 6) | ((fp2) << 4) | ((fp1) << 2) | (fp0))
+#endif
+
+struct QSSEIntrinsics : public QMMXIntrinsics
+{
+    static inline m64 alpha(m64 x) {
+        return _mm_shuffle_pi16 (x, _MM_SHUFFLE(3, 3, 3, 3));
+    }
+
+    static inline m64 _load_alpha(uint x, const m64 &mmx_0x0000) {
+        m64 t = _mm_unpacklo_pi8(_mm_cvtsi32_si64(x), mmx_0x0000);
+        return _mm_shuffle_pi16 (t, _MM_SHUFFLE(0, 0, 0, 0));
+    }
+};
+
+template <class MM>
+inline void qt_memfill32_sse_template(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;
+    };
+
+    __m64 *dst64 = reinterpret_cast<__m64*>(dest);
+    const __m64 value64 = _mm_set_pi32(value, value);
+    int count64 = count / 2;
+
+    int n = (count64 + 3) / 4;
+    switch (count64 & 0x3) {
+    case 0: do { _mm_stream_pi(dst64++, value64);
+    case 3:      _mm_stream_pi(dst64++, value64);
+    case 2:      _mm_stream_pi(dst64++, value64);
+    case 1:      _mm_stream_pi(dst64++, value64);
+    } while (--n > 0);
+    }
+
+    if (count & 0x1)
+        dest[count - 1] = value;
+
+    MM::end();
+}
+
+template <class MM>
+inline void qt_bitmapblit16_sse_template(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 __m64 c64 = _mm_set1_pi16(c);
+#if defined(Q_OS_WIN)
+#  pragma warning(disable: 4309) // truncation of constant value
+#endif
+    const __m64 maskmask1 = _mm_set_pi16(0x1010, 0x2020, 0x4040, 0x8080);
+    const __m64 maskadd1 = _mm_set_pi16(0x7070, 0x6060, 0x4040, 0x0000);
+
+    if (width > 4) {
+        const __m64 maskmask2 = _mm_set_pi16(0x0101, 0x0202, 0x0404, 0x0808);
+        const __m64 maskadd2 = _mm_set_pi16(0x7f7f, 0x7e7e, 0x7c7c, 0x7878);
+
+        while (height--) {
+            for (int x = 0; x < width; x += 8) {
+                const quint8 s = src[x >> 3];
+                if (!s)
+                    continue;
+                __m64 mask1 = _mm_set1_pi8(s);
+                __m64 mask2 = mask1;
+                mask1 = _m_pand(mask1, maskmask1);
+                mask1 = _mm_add_pi16(mask1, maskadd1);
+                _mm_maskmove_si64(c64, mask1, (char*)(dest + x));
+                mask2 = _m_pand(mask2, maskmask2);
+                mask2 = _mm_add_pi16(mask2, maskadd2);
+                _mm_maskmove_si64(c64, mask2, (char*)(dest + x + 4));
+            }
+            dest += destStride;
+            src += stride;
+        }
+    } else {
+        while (height--) {
+            const quint8 s = *src;
+            if (s) {
+                __m64 mask1 = _mm_set1_pi8(s);
+                mask1 = _m_pand(mask1, maskmask1);
+                mask1 = _mm_add_pi16(mask1, maskadd1);
+                _mm_maskmove_si64(c64, mask1, (char*)(dest));
+            }
+            dest += destStride;
+            src += stride;
+        }
+    }
+
+    MM::end();
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_HAVE_SSE
+#endif // QDRAWHELPER_SSE_P_H