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In the past, we imported the prototypes of built-in functions, generated calls to those, and waited until link time to resolve the calls and import the actual code for the built-in functions. This severely limited our compile-time optimization opportunities: even trivial functions like dot() were represented as function calls. We also had no way of reasoning about those calls; they could have been 1,000 line functions with side-effects for all we knew. Practically all built-in functions are trivial translations to ir_expression opcodes, so it makes sense to just generate those inline. Since we eventually inline all functions anyway, we may as well just do it for all built-in functions. There's only one snag: built-in functions that refer to built-in global variables need those remapped to the variables in the shader being compiled, rather than the ones in the built-in shader. Currently, ftransform() is the only function matching those criteria, so it seemed easier to just make it a special case. On Skylake: total instructions in shared programs: 12023491 -> 12024010 (0.00%) instructions in affected programs: 77595 -> 78114 (0.67%) helped: 97 HURT: 309 total cycles in shared programs: 137239044 -> 137295498 (0.04%) cycles in affected programs: 16714026 -> 16770480 (0.34%) helped: 4663 HURT: 4923 while these statistics are in the wrong direction, the number of hurt programs is small (309 / 41282 = 0.75%), and I don't think anything can be done about it. A change like this significantly alters the order in which optimizations are performed. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by; Ian Romanick <ian.d.romanick@intel.com> |
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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 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.