| Commit message (Collapse) | Author | Age | Files | Lines |
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Conflicts:
config_help.txt
configure
mkspecs/features/uikit/sdk.prf
src/corelib/global/qhooks.cpp
src/corelib/io/qfilesystemwatcher.cpp
src/corelib/io/qlockfile_unix.cpp
src/corelib/tools/qalgorithms.h
src/gui/kernel/qwindowsysteminterface.h
src/gui/text/qtextdocument_p.cpp
src/network/access/access.pri
src/network/access/qnetworkaccessmanager.cpp
src/network/access/qnetworkreplynsurlconnectionimpl.mm
src/src.pro
src/testlib/qtestcase.cpp
src/widgets/kernel/qwidgetbackingstore_p.h
src/widgets/styles/qwindowscestyle.cpp
src/widgets/styles/qwindowsmobilestyle.cpp
tests/auto/corelib/io/qdiriterator/qdiriterator.pro
tests/auto/corelib/io/qfileinfo/qfileinfo.pro
tests/auto/gui/kernel/qwindow/BLACKLIST
tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp
tools/configure/configureapp.cpp
Change-Id: Ibf7fb9c8cf263a810ade82f821345d0725c57c67
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Conflicts:
.qmake.conf
config.tests/unix/nis/nis.cpp
mkspecs/unsupported/freebsd-g++/qplatformdefs.h
src/corelib/tools/qdatetime.cpp
src/corelib/tools/qsimd.cpp
src/corelib/tools/qsimd_p.h
src/network/access/access.pri
src/network/access/qnetworkreplynsurlconnectionimpl.mm
src/network/access/qnetworkreplynsurlconnectionimpl_p.h
src/plugins/platforms/cocoa/qnsview.mm
src/plugins/printsupport/windows/qwindowsprintdevice.cpp
tests/auto/corelib/kernel/qobject/tst_qobject.cpp
tests/auto/network/access/qnetworkreply/BLACKLIST
tests/auto/widgets/widgets/qopenglwidget/BLACKLIST
Change-Id: I4b32055bbf922392ef0264fd403405416fffee57
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This merge also blacklists a flaky tst_QGL::clipTest test on
OpenSUSE 13.1.
Conflicts:
src/network/socket/qnativesocketengine_winrt.cpp
tests/auto/opengl/qgl/BLACKLIST
Task-number: QTBUG-53133
Change-Id: I14b431aa5a189b7dd1d3e2dfff767d15df20fde3
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Move the Q_ALWAYS_INLINE and forcing of __builtin_memcpy to the existing
functions.
Change-Id: Icaa7fb2a490246bda156ffff143c137e520eea79
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
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On OpenBSD, ffsll needs to be defined to compile. This is the
same change as in commit 725a9c27021bef1ac3828a4eafc013a2f50e6f22
for NetBSD.
Change-Id: I3060caa10950a9419084a12de8c88a2f98b34d07
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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On NetBSD, ffsll needs to be defined to compile. The fix adds the
according Q_OS_NETBSD define to the list of operating systems
needing the define.
Fix obtained from NetBSD port maintainer Kamil Rytarowski <n54@gmx.com>
via IRC.
Change-Id: I966a7b3fba43fb56e72f19f6b7f7cacc19c3c6cf
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Conflicts:
mkspecs/wince80colibri-armv7-msvc2012/qmake.conf
qmake/generators/win32/msvc_vcproj.cpp
src/corelib/global/qnamespace.h
src/corelib/global/qnamespace.qdoc
src/corelib/io/qfsfileengine_win.cpp
src/corelib/tools/tools.pri
src/network/ssl/qsslconfiguration_p.h
src/plugins/platforms/linuxfb/qlinuxfbscreen.cpp
src/plugins/platforms/windows/windows.pri
src/src.pro
src/tools/bootstrap/bootstrap.pro
src/tools/uic/cpp/cppwriteinitialization.cpp
src/widgets/dialogs/qfilesystemmodel.cpp
tests/auto/testlib/selftests/expected_cmptest.teamcity
tests/auto/testlib/selftests/expected_cmptest.txt
Change-Id: I4d2ac78f0dcc97f008186bbbc769c6fe588ab0e5
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Conflicts:
configure
src/3rdparty/angle/src/libANGLE/renderer/d3d/d3d11/Renderer11.cpp
src/network/access/qnetworkaccessmanager.cpp
src/plugins/platforms/cocoa/qcocoacolordialoghelper.mm
src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmcursor.cpp
src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmcursor.h
src/widgets/widgets/qlineedit_p.cpp
src/widgets/widgets/qlineedit_p.h
src/winmain/winmain.pro
tests/auto/corelib/io/qstorageinfo/tst_qstorageinfo.cpp
tests/auto/dbus/qdbusconnection/tst_qdbusconnection.cpp
tests/auto/dbus/qdbusconnection/tst_qdbusconnection.h
tests/auto/testlib/selftests/expected_cmptest.teamcity
tests/auto/testlib/selftests/expected_cmptest.txt
tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp
tools/configure/configureapp.cpp
Change-Id: Ib9997b0d0f91946e4081d36c0c6b696c5c983b2a
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15b42af11123f9d1eb4bbd79870185585103ea8d changed the qt_cpu_features
variable to be an array and never fixed this #if branch of the code.
Change-Id: Id69569111e7d4e619e22ffff144cf930f86f478e
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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Remove QSysInfo::WV_CE_5/6 enumeration values, #ifdef sections for Q_OS_WINCE
and wince .pro file clauses in library, examples and tests.
Task-number: QTBUG-51673
Change-Id: Ib63463445f3a26e04d018b193e4655030002f5f9
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
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This change partially reverts 1bfc7f68 about QT_HAS_BUILTIN define
and undef in src/corelib/tools/qsimd_p.h.
This change is also squashed with "Fall back to c++11 standard
compiler flag for host builds" which is done by Peter Seiderer.
Conflicts:
mkspecs/features/default_post.prf
src/3rdparty/sqlite/0001-Fixing-the-SQLite3-build-for-WEC2013-again.patch
src/3rdparty/sqlite/sqlite3.c
src/corelib/tools/qsimd_p.h
src/gui/kernel/qevent.cpp
src/gui/kernel/qwindowsysteminterface.cpp
src/gui/kernel/qwindowsysteminterface_p.h
src/plugins/bearer/blackberry/blackberry.pro
src/plugins/platforms/cocoa/qcocoasystemsettings.mm
src/plugins/platformthemes/gtk2/gtk2.pro
src/plugins/styles/bb10style/bb10style.pro
src/sql/drivers/sqlite2/qsql_sqlite2.cpp
tools/configure/configureapp.cpp
Task-number: QTBUG-51644
Done-with: Peter Seiderer <ps.report@gmx.net>
Change-Id: I6100d6ace31b2e8d41a95f0b5d5ebf8f1fd88b44
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Found by UBSan:
src/corelib/tools/qstring.cpp:587:42: runtime error: load of misaligned address 0x2acbf4b7551b for type 'const long long int', which requires 8 byte alignment
src/corelib/json/qjson_p.h:405:30: runtime error: store to misaligned address 0x0000019b1e52 for type 'quint64', which requires 8 byte alignment
src/corelib/tools/qhash.cpp:116:27: runtime error: load of misaligned address 0x2b8f9ce80e85 for type 'const qlonglong', which requires 8 byte alignment
src/corelib/tools/qhash.cpp:133:26: runtime error: load of misaligned address 0x2b8f9ce80e8d for type 'const ushort', which requires 2 byte alignment
Fix by memcpy()ing into a local variable. Wrap this trick in
template functions in qsimd_p.h. These are marked as always-
inline and use __builtin_memcpy() where available in an
attempt to avoid the memcpy() function call overhead in debug
builds.
While this looks prohibitively expensive, from the pov of the
C++ abstract machine, it is 100% equivalent, except for the
absence of undefined behavior. In one case, the cast produces
a local temporary which is then copied into the function, and
in the other case, that local variable comes from return value
of qUnalignedLoad().
Consequently, GCC compiles these two versions into identical
assembler code (only verfied for ucstrncmp, but there's no
reason to believe that it wouldn't hold for the other cases,
too).
Task-number: QTBUG-51651
Change-Id: Ia50d4a1d7580b6f803e0895c9f3d89c7da37840c
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com>
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Change-Id: I8f962ac7ee85af50a573a451f54931d6c0dd67eb
Reviewed-by: Augustin Cavalier <waddlesplash@gmail.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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iOS cannot do runtime feature detection, and querying the CPU is only
allowed in kernel mode (or beyond), so we have to decide the features
at compile time, in which case we might as well use the fallback code
path that uses the built in __ARM_* macros to point out which features
are supported, instead of hard-coding the features for iOS.
Change-Id: Ie507c0d8e962a7bdab16508c8b8122645276512e
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>
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Change-Id: Ifcad547caf2d2a7ad7aa1ccb4fbed08810905cee
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@theqtcompany.com>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>
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From Qt 5.7 -> tools & applications are lisenced under GPL v3 with some
exceptions, see
http://blog.qt.io/blog/2016/01/13/new-agreement-with-the-kde-free-qt-foundation/
Updated license headers to use new GPL-EXCEPT header instead of LGPL21 one
(in those files which will be under GPL 3 with exceptions)
Change-Id: I42a473ddc97101492a60b9287d90979d9eb35ae1
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
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Change-Id: I44898909181e25247bf96cf4462971ac23c2a3ac
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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From Qt 5.7 -> LGPL v2.1 isn't an option anymore, see
http://blog.qt.io/blog/2016/01/13/new-agreement-with-the-kde-free-qt-foundation/
Updated license headers to use new LGPL header instead of LGPL21 one
(in those files which will be under LGPL v3)
Change-Id: I046ec3e47b1876cd7b4b0353a576b352e3a946d9
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
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Change-Id: I3cfac90dfa137d0bf3d124d87262eb2dbb56459c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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cpuid and cpuidex are available as intrinsics, but the GNU-style
assembly is needed for xgetbv.
Change-Id: Ib9f280ac6b69b7ffb9c39289b52fa4af5e2de9ba
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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If, after checking a condition, we issue a qFatal()
or a qCritical(), by definition that check is
unlikely to be true.
Tell the compiler so it can move the error handling
code out of the normal code path to increase the
effective icache size.
Moved conditional code around where possible so that
we could always use Q_UNLIKELY, instead of having to
revert to Q_LIKELY here and there.
In some cases, simplified the expressions newly wrapped
in Q_UNLIKELY as a drive-by.
Change-Id: I67537d62b04bc6977d69254690c5ebbdf98bfd6d
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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The ffsll function is missing with that SDK, but Clang and GCC support
it as the builtin.
Change-Id: I9f4d900898814b569c1affff140e15fb59fb45d8
Reviewed-by: Samuel Gaist <samuel.gaist@edeltech.ch>
Reviewed-by: Jake Petroules <jake.petroules@theqtcompany.com>
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The other left shifts in this file already have the Q_UINT64_C wrapper.
This one was missed.
Change-Id: I42e7ef1a481840699a8dffff140d758ac370c402
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
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Detection for most of them is free because we're loading the entire
registers anyway. The only exception is AVX512VBMI, which is in a new
register we hadn't yet read from.
I've also added the new GCC names so they can be used with
QT_FUNCTION_TARGET. The only two exceptions are "movbe" and "popcnt",
which are extremely restricted in use and we are not likely to have code
dedicated to using them.
Change-Id: Ib306f8f647014b399b87ffff13f1d8fd29e58be0
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Instead of trying to detect one bit and set another, let's just use the
bits from the x86 CPUID instruction on x86. This makes use of the full
64-bit space now.
Since MSVC doesn't like enums bigger than 32-bit, we have to store the
bit number instead of the actual bit value in the constant. For that
reason, I also renamed the constants, to catch anyone who was using them
directly, instead of through qCpuHasFeature.
Change-Id: Ib306f8f647014b399b87ffff13f1d587692d827a
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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I'm going to need the extra bits for x86.
Change-Id: Ib306f8f647014b399b87ffff13f1d3d23e138518
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com>
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Conflicts:
doc/global/qt-cpp-defines.qdocconf
src/3rdparty/forkfd/forkfd.c
src/corelib/codecs/qtextcodec.cpp
src/corelib/kernel/qmetatype.cpp
src/corelib/tools/qset.qdoc
src/gui/accessible/qaccessible.cpp
src/gui/image/qpixmapcache.cpp
src/opengl/qgl.cpp
src/tools/qdoc/generator.cpp
src/widgets/kernel/qwidget.cpp
tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
Change-Id: I4fbe1fa756a54c6843aa75f4ef70a1069ba7b085
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It does. When CPUID was introduced in late 486, it already supported
leaf 1. That means all Pentium-class systems (including Intel's new
Quark systems) have CPUID and they have at least leaf 1.
Change-Id: Ib306f8f647014b399b87ffff13f1d5d2530d9ddd
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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There's no __HLE__ macro and there won't be, since the HLE prefix can be
run on older CPUs. There's no need for runtime detection.
Change-Id: Ib306f8f647014b399b87ffff13f1daba0e654b02
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
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If you're running Qt under valgrind, it stands to reason that you know
what you're doing.
In particular, Valgrind does support AVX and AVX2 instructions, but some
versions seem to be missing the necessary CPUID bits.
Change-Id: I9a75ad8521ae4e5cbbe5ffff13d1940f6fa5c4f4
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: David Faure <david.faure@kdab.com>
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Change-Id: Ib0dd8d34f0a5d68acb1efbc37680165e7d7933bd
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Gunnar Roth
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Bionic on x86 does not have an implementation of ffs(),
for some reason. The declaration is available in
strings.h, but causes a linker error. The toolchain has
a builtin version though, which can be used instead.
Change-Id: Iaf4c27542c1aabe88713842303251db44ae6ba86
Reviewed-by: Jani Heikkinen <jani.heikkinen@theqtcompany.com>
Reviewed-by: Christian Stromme <christian.stromme@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Qt copyrights are now in The Qt Company, so we could update the source
code headers accordingly. In the same go we should also fix the links to
point to qt.io.
Outdated header.LGPL removed (use header.LGPL21 instead)
Old header.LGPL3 renamed to header.LGPL3-COMM to match actual licensing
combination. New header.LGPL-COMM taken in the use file which were
using old header.LGPL3 (src/plugins/platforms/android/extract.cpp)
Added new header.LGPL3 containing Commercial + LGPLv3 + GPLv2 license
combination
Change-Id: I6f49b819a8a20cc4f88b794a8f6726d975e8ffbe
Reviewed-by: Matti Paaso <matti.paaso@theqtcompany.com>
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The sequence of (__GNUC__ * 100 + __GNUC_MINOR__) was used in quite a
few places. Simplify it to make the code more readable.
This follows the change done for Clang, which was quite necessary since
Apple's version of Clang has different build numbers.
Change-Id: I886271a5a5f21ae59485ecf8d140527723345a46
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
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- Renamed LICENSE.LGPL to LICENSE.LGPLv21
- Added LICENSE.LGPLv3
- Removed LICENSE.GPL
Change-Id: Iec3406e3eb3f133be549092015cefe33d259a3f2
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
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This code hasn't been tested for at least 4 years. It's not maintained
and probably doesn't work.
Change-Id: I4b9a5179e34111b400914f91caa6b741b69771bb
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
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The #undef in qcompilerdetection.h was missing.
And apparently we can detect Neon since Windows Mobile 6 too.
Change-Id: I38a5f71b2704a29a706183e39f43db3a78a729db
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
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It's easier to read AVXState and AVX512State than 6 and 0xe6.
Also add a note that where we should have checked whether the SSE state
is being saved by the OS. However, we won't do it because it's just a
waste of CPU cycles: any OS Qt 5 runs on will enable the proper
state-saving.
Change-Id: Id87b59fe1388a6cab983c9412341e36a86dd15c5
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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Add detection of MIPS DSPr2 at run-time in qsimd.cpp. This makes it
possible to have generic Qt builds for MIPS that can enable the fast
code paths for processors with the DSP ASE at run-time. Also, this
makes it possible to manually disable them by setting the environment
variable "QT_NO_CPU_FEATURE=dspr2". Last, but not least, functions
requiring DSPr2 are not enabled when running in CPUs with version-1
DSP.
Change-Id: Ia5a01d84119553c22ab83386c74a6cb8ba5fee53
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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This way, the same codebase works for x86, x86-64 LP64 and x86-64 ILP32
(a.k.a. x32).
Task-number: QTBUG-35463
Change-Id: Iffcecc6a4c03267fb64e287c2d6226d078d7d115
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Fixes ARM build, as the NEON drawhelpers and image conversion functions
were ifdef'ed out.
Follow-up to 1b12c0608be2359baa2f96ae28b135a84abd388c.
Change-Id: I0b5e89c8f445741432db2dfe1f8d971b971c8605
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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If we're compiling for Pentium or better CPUs, then we know that the
CPUID instruction is present (I think it was introduced in late 486s,
actually). So don't try to detect it. Simply assume it's there and then
execute it.
This means that if you compile Qt for Pentium (or higher) and run it on
an i386 or i486, you'll get a SIGILL (or whatever your OS produces for
an #UD processor exception). If the CPU detection code even got run --
SIGILL might happen for any other instructions found along the way.
Change-Id: Iacd4a94a51363a609a61fc2bfd2e218fb290272d
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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MinGW has a longstanding problem of providing the MSVC intrinsics that
every Windows developer expects to be there. Other projects have run
into those problems.
So instead just use the GCC inline assembly.
Change-Id: I5651f97f9a4dfbf98ebbf063f91f221eab80b224
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
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use the same conditional around the #include as the actual code below
uses, otherwise we risk mismatches.
Change-Id: I8ca32c0178b1970928626a927948b06d4c6d31b9
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Follow the conventions at
http://qt-project.org/wiki/Spelling_Module_Names_in_Qt_Documentation
QtCore -> Qt Core
QtDBus -> Qt D-Bus
QtDesigner -> Qt Designer
QtGui -> Qt GUI
QtImageFormats -> Qt Image Formats
QtNetwork -> Qt Network
QtPrintSupport -> Qt Print Support
QtScript -> Qt Script
QtSql -> Qt SQL
QtSvg -> Qt SVG
QtTest -> Qt Test
QtWebKit -> Qt WebKit
QtWidgets -> Qt Widgets
QtXml -> Qt XML
QtConcurrent -> Qt Concurrent (partial)
QtQuick -> Qt Quick (partial)
Also, distinguish between "module" and "library"
Change-Id: Icb8aa695ae60b0e45920b0c8fce4dc763a12b0cd
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
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Change-Id: Ic804938fc352291d011800d21e549c10acac66fb
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
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Change copyrights and license headers from Nokia to Digia
Change-Id: If1cc974286d29fd01ec6c19dd4719a67f4c3f00e
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
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Change-Id: Ibae8d10183f6b15a16b1499daa2df8802dbb014e
Reviewed-by: Geir Vattekar <geir.vattekar@nokia.com>
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This is not the first time that GCC 4.2 on Mac has produced bad code
surrounding the CPUID instruction (see also commit 81d1f79a7f4b0f67d71).
So declare it broken beyond repair and don't run the instruction at all.
Instead, initialise the set of features found to be exactly that which
we detected at compile-time. For that reason, we can also disable the
runtime checking of the processor (minFeatures == detected features).
At the time of this commit, only the draw helpers and one QImage
helper make use of the runtime detection. Since the detection now
switches to compile-time, QtGui will start carrying dead code for GCC
4.2 and earlier: it will never run the SSE2/SSSE3 code on 32-bit
builds. (GCC 4.2 does not support AVX, so that code won't be built)
Note: all Clang versions report that they are GCC 4.2, so we need to
exclude it from the test; ICC reports the same version as the system's
GCC.
Change-Id: I43f168a9480a2479c6444eea175782b2eadc2ab2
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>
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First, check that the option in question hasn't been already enabled
by the compiler, via compiler switches. If it has been, then we don't
need to verify anything, and we can assume that it's safe to use such
instructions. For example, on an x86-64 build, qCpuHasFeature(SSE2) is
always a constant true.
If the compile-time check fails, then we proceed to try and detect the
processor features at runtime. But instead of insisting on a call to
qDetectCPUFeatures, allow the code using the detection to read from a
variable and simply test it for values. Only if the variable isn't
initialised should it make a function call. The Q_ASSUME allows this
code to be very efficient even with multiple uses of qCpuHasFeature.
Change the uninitialised value from -1 to 0 so that simpler
instructions can be used to check for non-initialisation.
The qDetectCPUFeatures function is renamed to qDetectCpuFeatures to
match the Qt coding style and also to catch uses this code that need
to be adapted.
Change-Id: I24ca5a6ad21075e2e249e1a4f8f5057b8f68ce7c
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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