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| author | Thiago Macieira <thiago.macieira@intel.com> | 2018-05-23 00:54:19 -0300 |
|---|---|---|
| committer | Thiago Macieira <thiago.macieira@intel.com> | 2018-07-09 00:18:24 +0000 |
| commit | c3a4ec5d0bbd5f2710f4fd1d3bd4a2d7f0f507ad (patch) | |
| tree | f18c0e54743eb213df0e5374bb5fdf4281aa5c4e /mkspecs/common | |
| parent | 746f15d0c213fef0e46207682815bd839a36ecc6 (diff) | |
SIMD: Add a haswell sub-architecture selection to our support
As the comment says, Haswell is a nice divider and is a good
optimization target.
I'm using -march=core-avx2 instead of -march=haswell because the latter
form was only added to GCC 4.9 but we still support 4.7 and that has
support for AVX2.
This commit changes the AVX2-optimized code in QtGui to Haswell-
optimized instead. That means, for example, that qdrawhelper_avx2.cpp
can now use the FMA instructions.
Change-Id: If025d476890745368955fffd153129c1716ba006
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
Diffstat (limited to 'mkspecs/common')
| -rw-r--r-- | mkspecs/common/gcc-base.conf | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mkspecs/common/gcc-base.conf b/mkspecs/common/gcc-base.conf index e51b173276..c2669e4833 100644 --- a/mkspecs/common/gcc-base.conf +++ b/mkspecs/common/gcc-base.conf @@ -108,6 +108,9 @@ QMAKE_CFLAGS_NEON += -mfpu=neon QMAKE_CFLAGS_MIPS_DSP += -mdsp QMAKE_CFLAGS_MIPS_DSPR2 += -mdspr2 +# -march=haswell is supported as of GCC 4.9 and Clang 3.6 +QMAKE_CFLAGS_ARCH_HASWELL = -march=core-avx2 + # Wrapper tools that understand .o/.a files with GIMPLE instead of machine code QMAKE_AR_LTCG = gcc-ar cqs QMAKE_NM_LTCG = gcc-nm -P |