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Previously when generating the send instruction for a sample instruction with an indirect sampler it would use the destination register as a temporary store. This breaks when used in combination with the opt_sampler_eot optimisation because that forces the destination to be null. This patch fixes that by avoiding the temp register altogether. The reason the temporary register was needed was because it was trying to ensure the binding table index doesn't overflow a byte by and'ing it with 0xff. The result is then or'd with samper_index<<8. This patch instead just and's the whole thing by 0xfff. This will ensure that a bogus sampler index won't overflow into the rest of the message descriptor but unlike the previous code it won't ensure that the binding table index doesn't overflow into the sampler index. It doesn't seem like that should matter very much though because if the shader is generating a bogus sampler index then it's going to just get garbage out either way. Instead of doing sampler_index<<8|(sampler_index+base_table_index) the new code avoids one operation by doing sampler_index*0x101+base_table_index which should be equivalent. However if we wanted to avoid the multiply for some reason we could do this by adding an extra or instruction still without needing the temporary register. This fixes a number of Piglit tests on Skylake that were using indirect samplers such as: spec@arb_gpu_shader5@execution@sampler_array_indexing@fs-simple Reviewed-by: Matt Turner <mattst88@gmail.com> Reviewed-by: Chris Forbes <chrisf@ijw.co.nz> Acked-by: Ben Widawsky <ben@bwidawsk.net> Tested-by: Anuj Phogat <anuj.phogat@gmail.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.