8bd67a35c5
By using a dst_type in the the gather interface, gather has some more knowledge about how values should be fetched. E.g. if this is a 3x32bit fetch and dst_type is 4x32bit vector gather will no longer do a ZExt with a 96bit scalar value to 128bit, but just fetch the 96bit as 3x32bit vector (this is still going to be 2 loads of course, but the loads can be done directly to simd vector that way). Also, we can now do some try to use the right int/float type. This should make no difference really since there's typically no domain transition penalties for such simd loads, however it actually makes a difference since llvm will use different shuffle lowering afterwards so the caller can use this to trick llvm into using sane shuffle afterwards (and yes llvm is really stupid there - nothing against using the shuffle instruction from the correct domain, but not at the cost of doing 3 times more shuffles, the case which actually matters is refusal to use shufps for integer values). Also do some attempt to avoid things which look great on paper but llvm doesn't really handle (e.g. fetching 3-element 8 bit and 16 bit vectors which is simply disastrous - I suspect type legalizer is to blame trying to extend these vectors to 128bit types somehow, so fetching these with scalars like before which is suboptimal due to the ZExt). Remove the ability for truncation (no point, this is gather, not conversion) as it is complex enough already. While here also implement not just the float, but also the 64bit avx2 gathers (disabled though since based on the theoretical numbers the benefit just isn't there at all until Skylake at least). Reviewed-by: Jose Fonseca <jfonseca@vmware.com> |
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| REVIEWERS | ||
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| common.py | ||
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| install-gallium-links.mk | ||
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docs/README.WIN32
File: docs/README.WIN32 Last updated: 21 June 2013 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons libgl-gdi to build gallium based GDI driver. This will work both with MSVS or Mingw. Windows Drivers ------- ------- At this time, only the gallium GDI driver is known to work. Source code also exists in the tree for other drivers in src/mesa/drivers/windows, but the status of this code is unknown. Recipe ------ Building on windows requires several open-source packages. These are steps that work as of this writing. - install python 2.7 - install scons (latest) - install mingw, flex, and bison - install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe - install git - download mesa from git see http://www.mesa3d.org/repository.html - run scons General ------- After building, you can copy the above DLL files to a place in your PATH such as $SystemRoot/SYSTEM32. If you don't like putting things in a system directory, place them in the same directory as the executable(s). Be careful about accidentially overwriting files of the same name in the SYSTEM32 directory. The DLL files are built so that the external entry points use the stdcall calling convention. Static LIB files are not built. The LIB files that are built with are the linker import files associated with the DLL files. The si-glu sources are used to build the GLU libs. This was done mainly to get the better tessellator code. If you have a Windows-related build problem or question, please post to the mesa-dev or mesa-users list.