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This simplifies the code that iterates over the per-component values found in the matching copy_entry struct and checks whether the register regions that were copied to each component are similar enough to be treated as a single (reswizzled) value which can be propagated into the current instruction. Aside from being scattered between opt_copy_propagation(), try_copy_propagate(), and try_constant_propagate(), what I found terribly confusing about the preexisting logic was that opt_copy_propagation() tried to reorder the array of values according to the swizzle of the instruction source, which meant one would have had to invert the reordering applied at the top level in order to find out which component to take from each value (we were just taking the i-th component from the i-th value, which is not correct in general). The saturate mask was also being swizzled incorrectly. This consolidates the logic for matching multiple components of a copy_entry into a single function which returns the result as a regular src_reg on success, as if the copy had been performed with a single MOV instruction copying all components of the src_reg into the destination. Fixes several ARB_vertex_program MOV test-cases from: https://cgit.freedesktop.org/~kwg/piglit/log/?h=arb_program Acked-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 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.