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On released hardware, values 4-6 are overloaded. For normal registers, they mean UB/B/DF. But for immediates, they mean UV/VF/V. Previously, we just created #defines for each name, reusing the same value. This meant we could directly splat the brw_reg::type field into the assembly encoding, which was fairly nice, and worked well. Unfortunately, Broadwell makes this infeasible: the HF and DF types are represented as different numeric values depending on whether the source register is an immediate or not. To preserve sanity, I decided to simply convert BRW_REGISTER_TYPE_* to an abstract enum that has a unique value for each register type, and write translation functions. One nice benefit is that we can add assertions about register files and generations. I've chosen not to convert brw_reg::type to the enum, since converting it caused a lot of trouble due to C++ enum rules (even though it's defined in an extern "C" block...). Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> Reviewed-by: Eric Anholt <eric@anholt.net> |
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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 osmesa mesagdi to build classic mesa Windows GDI drivers; or 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. 1) install python 2.7 2) install scons (latest) 3) install mingw, flex, and bison 4) install libxml2 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get libxml2-python-2.9.1.win-amd64-py2.7.exe 5) install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe 6) install git 7) download mesa from git see http://www.mesa3d.org/repository.html 8) 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.