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When the original instruction had a stride > 1, the combined registers written by the split instructions won't amount to the same register space written by the original instruction because the split instructions will use a stride of 1. The current code assumed otherwise and computed the number of registers written by split instructions as an equal share based on the relation between the lowered width and the original execution size of the instruction. It is only after the split, when we interleave the components of the result from the lowered instructions back into the original dst register, that the original stride takes effect and we write all the registers specified by the original instruction. Just make the number of register written the same as the vgrf space we allocate for the dst of the split instruction. Fixes crashes in fp64 tests produced as a result of assigning incorrectly the number of registers written by split instructions, which led to incorrect validation of the size of the writes against the allocated vgrf space. Reviewed-by: Francisco Jerez <currojerez@riseup.net> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> |
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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.