diff -r 5dc02b23752f -r 3e2da88830cd src/gui/image/qimage_sse2.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/image/qimage_sse2.cpp	Wed Aug 18 10:37:55 2010 +0300
@@ -0,0 +1,109 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qimage.h"
+#include <private/qimage_p.h>
+#include <private/qsimd_p.h>
+#include <private/qdrawhelper_p.h>
+#include <private/qdrawingprimitive_sse2_p.h>
+
+#ifdef QT_HAVE_SSE2
+
+QT_BEGIN_NAMESPACE
+
+bool convert_ARGB_to_ARGB_PM_inplace_sse2(QImageData *data, Qt::ImageConversionFlags)
+{
+    Q_ASSERT(data->format == QImage::Format_ARGB32);
+
+    // extra pixels on each line
+    const int spare = data->width & 3;
+    // width in pixels of the pad at the end of each line
+    const int pad = (data->bytes_per_line >> 2) - data->width;
+    const int iter = data->width >> 2;
+    int height = data->height;
+
+    const __m128i alphaMask = _mm_set1_epi32(0xff000000);
+    const __m128i nullVector = _mm_setzero_si128();
+    const __m128i half = _mm_set1_epi16(0x80);
+    const __m128i colorMask = _mm_set1_epi32(0x00ff00ff);
+
+    __m128i *d = reinterpret_cast<__m128i*>(data->data);
+    while (height--) {
+        const __m128i *end = d + iter;
+
+        for (; d != end; ++d) {
+            const __m128i srcVector = _mm_loadu_si128(d);
+            const __m128i srcVectorAlpha = _mm_and_si128(srcVector, alphaMask);
+            if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, alphaMask)) == 0xffff) {
+                // opaque, data is unchanged
+            } else if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, nullVector)) == 0xffff) {
+                // fully transparent
+                _mm_storeu_si128(d, nullVector);
+            } else {
+                __m128i alphaChannel = _mm_srli_epi32(srcVector, 24);
+                alphaChannel = _mm_or_si128(alphaChannel, _mm_slli_epi32(alphaChannel, 16));
+
+                __m128i result;
+                BYTE_MUL_SSE2(result, srcVector, alphaChannel, colorMask, half);
+                result = _mm_or_si128(_mm_andnot_si128(alphaMask, result), srcVectorAlpha);
+                _mm_storeu_si128(d, result);
+            }
+        }
+
+        QRgb *p = reinterpret_cast<QRgb*>(d);
+        QRgb *pe = p+spare;
+        for (; p != pe; ++p) {
+            if (*p < 0x00ffffff)
+                *p = 0;
+            else if (*p < 0xff000000)
+                *p = PREMUL(*p);
+        }
+
+        d = reinterpret_cast<__m128i*>(p+pad);
+    }
+
+    data->format = QImage::Format_ARGB32_Premultiplied;
+    return true;
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_HAVE_SSE2