Kenneth Graunke
09655bb81b
Previously, brw_CMP with a null destination implicitly set the default state to make future instructions predicated. This is messy and confusing - emitting a CMP that populates the flag register and later using it to predicate instructions are logically separate. With the main compiler, we may even schedule instructions between the CMP and the user of the flag value. This patch simplifies brw_CMP to just emit a CMP instruction, and not mess with predication. It also updates all necessary callers. These mostly fell into two patterns: 1. brw_CMP followed by brw_IF. We don't need to do anything special here; brw_IF already sets up predication appropriately. 2. brw_CMP followed by a single predicated instruction. The old model was to call brw_CMP, emit the next (predicated) instruction, then disable predication for any instructions beyond that. Instead, just explicitly set predicate_control on the single instruction we want to predicate. It's no more code, and requires less cross-module knowledge. This drops setting flag_value to 0xff as well, which is a field only used by the SF compile. There is only one brw_CMP call in the SF code, which is in do_twoside_caller, and called at the start of brw_emit_tri_setup, where flag_value is already 0xff. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Matt Turner <mattst88@gmail.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 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. - 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.