Setup of runtime cuda device (#1162)

* CUDA generated first test compiles.

* WIP on enabling CUDA in render-test.

* Detect CUDA_PATH environmental variable to build build cuda support into render-test.
Added WIP cuda-compute-util.cpp/h
Added  CUDA as a renderer type.

* Fix libraries needed for cuda in premake.

* Added -enable-cuda premake option. Defaults to false.

* Creates CUDA device, loads PTX and finds entry point.

* Fix some erroneous cruft from slang-cuda-prelude.h

1 files changed, 31 insertions, 0 deletions

diff --git a/premake5.lua b/premake5.lua
index 1905bd2f4..4de256321 100644
--- a/premake5.lua
+++ b/premake5.lua
@@ -84,10 +84,26 @@ newoption {
    allowed     = { { "true", "True"}, { "false", "False" } }
 }
 
+newoption {
+   trigger     = "enable-cuda",
+   description = "(Optional) If true will enable cuda tests, if CUDA is found via CUDA_PATH",
+   value       = "bool",
+   default     = "false",
+   allowed     = { { "true", "True"}, { "false", "False" } }
+}
+
 buildLocation = _OPTIONS["build-location"]
 executeBinary = (_OPTIONS["execute-binary"] == "true")
 targetDetail = _OPTIONS["target-detail"]
 buildGlslang = (_OPTIONS["build-glslang"] == "true")
+enableCuda = (_OPTIONS["enable-cuda"] == "true")
+
+-- cudaPath is only set if cuda is enabled, and CUDA_PATH enviromental variable is set
+cudaPath = nil
+if enableCuda then
+    -- Get the CUDA path from the environment variable. If set, CUDA will be assumed installed
+    cudaPath = os.getenv("CUDA_PATH")
+end    
 
 -- Is true when the target is really windows (ie not something on top of windows like cygwin)
 local isTargetWindows = (os.target() == "windows") and not (targetDetail == "mingw" or targetDetail == "cygwin")
@@ -529,6 +545,21 @@ toolSharedLibrary "render-test"
         -- d3dcompiler_47.dll is copied from the external/slang-binaries submodule.
         postbuildcommands { '"$(SolutionDir)tools\\copy-hlsl-libs.bat" "$(WindowsSdkDir)Redist/D3D/%{cfg.platform:lower()}/" "%{cfg.targetdir}/" "windows-%{cfg.platform:lower()}"'}    
     end
+   
+    if type(cudaPath) == "string" and isTargetWindows then
+        addSourceDir "tools/render-test/cuda"
+        defines { "RENDER_TEST_CUDA" }
+        includedirs { cudaPath .. "/include" }
+        includedirs { cudaPath .. "/include", cudaPath .. "/common/inc" }
+        
+        filter { "platforms:x86" }
+            libdirs { cudaPath .. "/lib/Win32/" }
+           
+        filter { "platforms:x64" }
+            libdirs { cudaPath .. "/lib/x64/" }   
+           
+        links { "cuda", "cudart" }   
+    end
   
 --
 -- `gfx` is a utility library for doing GPU rendering