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If we only feed one source vector at a time, we cannot use pack intrinsics (as we only have a 64bit destination dst vector). lp_bld_conv_auto is specifically designed to alter the length and number of destination vectors, so this works just fine (if we use single source vectors at a time, afterwards we immediately reassemble the vectors). For AVX though this isn't really possible, since we expect 128bit output already for a single 256bit input. (One day we should handle AVX2 which again would need multiple inputs, however there's the problem that we get different ordered output there and we don't want to reorder, so would need to be able to tell build_conv to handle upper and lower halfs independently.) A similar strategy would probably work for 32->8bit too (if it doesn't hit the special case) but I'm going to try something different for that... 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.