GSOC 2017 is effectively over for me, Here's the link to the GSOC landing page that I will be submitting later: https://github.com/programmerjake/vulkan-cpu/blob/gsoc-2017/docs/gsoc-2017-landing-page.md
I've only completed part of the Vulkan on CPU project: - I've completely implemented generating the SPIR-V parser from Khronos's JSON grammar description files. - I've completely implemented using LLVM ORC as the JIT compiler back-end. I implemented a ORC layer that integrates with the old JITEventListener interface, allowing me to use LLVM's debugger integration. - I've developed this project on GNU/Linux, so it has complete support. - I've partially implemented translating from SPIR-V to LLVM IR. - I've partially implemented generating a graphics pipeline by compiling several shaders together. - I've partially implemented image support: currently only VK_FORMAT_B8G8R8A8_UNORM - I have a temporary rasterizer implementation: I've implemented a scanline rasterizer just to get stuff to draw, I'm planning on replacing it with the originally-planned tiled binning rasterizer. - I have less than 5 functions to implement before it will work on Win32, mostly filesystem support. - I've not yet started implementing the actual Vulkan ICD interface. - I've not yet started implementing the Whole-function vectorization pass. - I've not yet started implementing support for other platforms, however, it should compile and run without problems on most Unix systems. Some interesting things I learned: - Vulkan doesn't actually specify using the top-left fill rule. (I couldn't find it in the rasterization section of the Vulkan specification.) - SPIR-V is surprisingly complicated to parse for an IR that's designed to be simple to parse. OpSwitch requires you to determine the bit-width of the value being switched on before you can parse the list of cases. See https://bugs.freedesktop.org/show_bug.cgi?id=101560 I had gotten delayed by my implementing a SPIR-V parser myself. In hindsight, the amount of time needed to run the SPIR-V to LLVM IR translator is dwarfed by running LLVM's optimizations, so I could have just used the SPIR-V parser that Khronos has already written as it's fast enough. Jacob Lifshay
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