Merge branch 'master' of git://scm.dev.nokia.troll.no/qt/qt-doc-team

* 'master' of git://scm.dev.nokia.troll.no/qt/qt-doc-team: (63 commits)
  my changelog for 4.8.0
  Add a function that returns the D-Bus local machine ID
  Add an SSE4.2 even simpler version of toLatin1
  Skip boundry neutral characters in bidi itemization
  symbian socket engine: resolve some fixme and todo items
  trivial: fix typo in comment
  Fix QDeclarativeInspector when starting with ,block
  changelog
  docu update for QNX 6.5
  get rid of anacronysm
  massive improvements for the QNX screen driver
  massive improvements for the QNX mouse driver
  massive improvements for the QNX keyboard driver
  disable the Embedded Linux data directory permissions check for QNX
  skip two subtests that are known to fail on QNX
  implement POSIX IPC based QLock, QWSLock and QWSSharedMemory backends
  implement POSIX IPC based QSystemSemaphore and QSharedMemory backends
  add a configure-time check for an IPC support
  make QProcess really work on QNX
  make the kernel attempt to emulate an instruction with a misaligned access
  ...

2 files changed, 24 insertions, 0 deletions

diff --git a/src/corelib/tools/qstring.cpp b/src/corelib/tools/qstring.cpp
index f8f4bdc..ee45cfd 100644
--- a/src/corelib/tools/qstring.cpp
+++ b/src/corelib/tools/qstring.cpp
@@ -3580,6 +3580,28 @@ static inline __m128i mergeQuestionMarks(__m128i chunk)
 {
     const __m128i questionMark = _mm_set1_epi16('?');
 
+# ifdef __SSE4_2__
+    // compare the unsigned shorts for the range 0x0100-0xFFFF
+    // note on the use of _mm_cmpestrm:
+    //  The MSDN documentation online (http://technet.microsoft.com/en-us/library/bb514080.aspx)
+    //  says for range search the following:
+    //    For each character c in a, determine whether b0 <= c <= b1 or b2 <= c <= b3
+    //
+    //  However, all examples on the Internet, including from Intel
+    //  (see http://software.intel.com/en-us/articles/xml-parsing-accelerator-with-intel-streaming-simd-extensions-4-intel-sse4/)
+    //  put the range to be searched first
+    //
+    //  Disassembly and instruction-level debugging with GCC and ICC show
+    //  that they are doing the right thing. Inverting the arguments in the
+    //  instruction does cause a bunch of test failures.
+
+    const int mode = _SIDD_UWORD_OPS | _SIDD_CMP_RANGES | _SIDD_UNIT_MASK;
+    const __m128i rangeMatch = _mm_cvtsi32_si128(0xffff0100);
+    const __m128i offLimitMask = _mm_cmpestrm(rangeMatch, 2, chunk, 8, mode);
+
+    // replace the non-Latin 1 characters in the chunk with question marks
+    chunk = _mm_blendv_epi8(chunk, questionMark, offLimitMask);
+# else
     // SSE has no compare instruction for unsigned comparison.
     // The variables must be shiffted + 0x8000 to be compared
     const __m128i signedBitOffset = _mm_set1_epi16(0x8000);
@@ -3603,6 +3625,7 @@ static inline __m128i mergeQuestionMarks(__m128i chunk)
     // merge offLimitQuestionMark and correctBytes to have the result
     chunk = _mm_or_si128(correctBytes, offLimitQuestionMark);
 #  endif
+# endif
     return chunk;
 }
 #endif
diff --git a/src/corelib/tools/qstring.h b/src/corelib/tools/qstring.h
index c61d09e..bf0a0ad 100644
--- a/src/corelib/tools/qstring.h
+++ b/src/corelib/tools/qstring.h
@@ -639,6 +639,7 @@ private:
     static Data *fromAscii_helper(const char *str, int size = -1);
     void replace_helper(uint *indices, int nIndices, int blen, const QChar *after, int alen);
     friend class QCharRef;
+    friend class QCFString;
     friend class QTextCodec;
     friend class QStringRef;
     friend struct QAbstractConcatenable;