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For the texturing packs, things looked pretty terrible. For every lerp, we were repacking the values, and while those look sort of cheap with 128bit, with 256bit we end up with 2 of them instead of just 1 but worse, plus 2 extracts too (the unpack, however, works fine with a single instruction, albeit only with llvm 3.8 - the vpmovzxbw). Ideally we'd use more clever pack for llvmpipe backend conversion too since we actually use the "wrong" shuffle (which is more work) when doing the fs twiddle just so we end up with the wrong order for being able to do native pack when converting from 2x8f -> 1x16b. But this requires some refactoring, since the untwiddle is separate from conversion. This is only used for avx2 256bit pack/unpack for now. Improves openarena scores by 8% or so, though overall it's still pretty disappointing how much faster 256bit vectors are even with avx2 (or rather, aren't...). And, of course, eliminating the needless packs/unpacks in the first place would eliminate most of that advantage (not quite all) from this patch. Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
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.