diff options
author | Thiago Macieira <thiago.macieira@intel.com> | 2013-08-06 19:32:37 -0700 |
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committer | The Qt Project <gerrit-noreply@qt-project.org> | 2014-05-27 06:26:57 +0200 |
commit | 689e8055f5c4f3bbdbb9a90ac0405b5295f81374 (patch) | |
tree | 619de88b9d816d5d9d8b7b0fc420bd286f81627d /tools/configure | |
parent | cb09e1e88944e1ab9b0d00a95cdc71bdab69ad58 (diff) |
Add support for single-file multi-target intrinsics in Qt
GCC 4.9 now allows us to #include any and all intrinsics headers, not
just the one for which we're compiling code, a behavior that ICC and
MSVC have had for some time. With that, we're able to have the functions
for different targets in the same source file. See the GCC manual:
http://gcc.gnu.org/onlinedocs/gcc/Function-Multiversioning.html
This functionality is notified by the QT_COMPILER_SUPPORTS_HERE(XXX)
macro, which indicates that all the intrinsics from
QT_COMPILER_SUPPORTS_xxx are available and enabled. To complement, a
QT_COMPILER_SUPPORTS(XXX) macro is also added.
Unlike ICC and MSVC, GCC requires a special function attribute, which
will also cause code optimization. That's the QT_FUNCTION_TARGET macro.
Note: because of the absence of the target attribute, ICC and MSVC will
not generate instructions with the VEX prefix unless they only exist
with the VEX prefix or if -mavx / -arch:AVX are enabled.
Change-Id: I0c1880c20324bd8e0fc68a863e36d1fa7755dff0
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@digia.com>
Diffstat (limited to 'tools/configure')
-rw-r--r-- | tools/configure/configureapp.cpp | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/tools/configure/configureapp.cpp b/tools/configure/configureapp.cpp index 37bf576d37..06083f2592 100644 --- a/tools/configure/configureapp.cpp +++ b/tools/configure/configureapp.cpp @@ -3476,21 +3476,21 @@ void Configure::generateConfigfiles() tmpStream << endl << "// Compiler sub-arch support" << endl; if (dictionary[ "SSE2" ] == "yes") - tmpStream << "#define QT_COMPILER_SUPPORTS_SSE2" << endl; + tmpStream << "#define QT_COMPILER_SUPPORTS_SSE2 1" << endl; if (dictionary[ "SSE3" ] == "yes") - tmpStream << "#define QT_COMPILER_SUPPORTS_SSE3" << endl; + tmpStream << "#define QT_COMPILER_SUPPORTS_SSE3 1" << endl; if (dictionary[ "SSSE3" ] == "yes") - tmpStream << "#define QT_COMPILER_SUPPORTS_SSSE3" << endl; + tmpStream << "#define QT_COMPILER_SUPPORTS_SSSE3 1" << endl; if (dictionary[ "SSE4_1" ] == "yes") - tmpStream << "#define QT_COMPILER_SUPPORTS_SSE4_1" << endl; + tmpStream << "#define QT_COMPILER_SUPPORTS_SSE4_1 1" << endl; if (dictionary[ "SSE4_2" ] == "yes") - tmpStream << "#define QT_COMPILER_SUPPORTS_SSE4_2" << endl; + tmpStream << "#define QT_COMPILER_SUPPORTS_SSE4_2 1" << endl; if (dictionary[ "AVX" ] == "yes") - tmpStream << "#define QT_COMPILER_SUPPORTS_AVX" << endl; + tmpStream << "#define QT_COMPILER_SUPPORTS_AVX 1" << endl; if (dictionary[ "AVX2" ] == "yes") - tmpStream << "#define QT_COMPILER_SUPPORTS_AVX2" << endl; + tmpStream << "#define QT_COMPILER_SUPPORTS_AVX2 1" << endl; if (dictionary[ "IWMMXT" ] == "yes") - tmpStream << "#define QT_COMPILER_SUPPORTS_IWMMXT" << endl; + tmpStream << "#define QT_COMPILER_SUPPORTS_IWMMXT 1" << endl; if (dictionary["QREAL"] != "double") tmpStream << "#define QT_COORD_TYPE " << dictionary["QREAL"] << endl; |