Support for float atomics on RWByteAddressBuffer (#1502)

* Fix premake5.lua so it uses the new path needed for OpenCLDebugInfo100.h

* Keep including the includes directory.

* Added the spirv-tools-generated files.

* We don't need to include the spirv/unified1 path because the files needed are actually in the spirv-tools-generated folder.

* Put the build_info.h glslang generated files in external/glslang-generated. Alter premake5.lua to pick up that header.

* First pass at documenting how to build glslang and spirv-tools.

* Improved glsl/spir-v tools README.md

* Added revision.h

* Change how gResources is calculated.
Update about revision.h

* Update docs a little.

* Split out spirv-tools into a separate project for building glslang. This was not necessary on linux, but *is* necessary on windows, because there is a file disassemble.cpp in spirv-tools and in glslang, and this leads to VS choosing only one. With the separate library, the problem is resolved.

* Fix direct-spirv-emit output.

* Update to latest version of spirv headers and spirv-tools.

* Upgrade submodule version of glslang in external.

* Add fPIC to build options of slang-spirv-tools

* WIP adding support for InterlockedAddFp32

* Upgrade slang-binaries to have new glslang.

* Fix issues with Windows slang-glslang binaries, via update of slang-binaries used.

* WIP - atomicAdd. This solution can't work as we can't do (float*) in glsl.

* WIP on atomic float ops.

* Added checking for multiple decls that takes into account __target_intrinsic and __specialized_for_target.
First pass impl of atomic add on float for glsl.

* Split __atomicAdd so extensions are applied appropriately.

* Made Dxc/Fxc support includes.
Use HLSL prelude to pass the path to nvapi
Added -nv-api-path

* Refactor around IncludeHandler and impl of IncludeSystem

* slang-include-handler -> slang-include-system
Have IncludeHandler/Impl defined in slang-preprocessor

* Small comment improvements.

* Document atomic float add addition in target-compatibility.md.

* CUDA float atomic support on RWByteAddressBuffer.

* Add atomic-float-byte-address-buffer-cross.slang

* Removed inappropriate-once.slang - the test is no longer valid when a file is loaded and has a unique identity by default. A test could be made, but would require an API call to create the file (so no unique id).
Improved handling of loadFile - uses uniqueId if has one.

* Work around for testing target overlaps - to avoid exceptions on adding targets.
Simplify PathInfo setup.
Modify single-target-intrinsic.slang - it no longer failed because there were no longer multiple definitions for the same target.

Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>

1 files changed, 62 insertions, 0 deletions

diff --git a/source/slang/slang-include-system.h b/source/slang/slang-include-system.h
new file mode 100644
index 000000000..3b368b70d
--- /dev/null
+++ b/source/slang/slang-include-system.h
@@ -0,0 +1,62 @@
+#ifndef SLANG_INCLUDE_SYSTEM_H
+#define SLANG_INCLUDE_SYSTEM_H
+// slang-include-system.h
+
+#include "slang-source-loc.h"
+
+namespace Slang
+{
+
+// A directory to be searched when looking for files (e.g., `#include`)
+struct SearchDirectory
+{
+    SearchDirectory() = default;
+    SearchDirectory(SearchDirectory const& other) = default;
+    SearchDirectory(String const& path)
+        : path(path)
+    {}
+
+    String path;
+};
+
+/// A list of directories to search for files (e.g., `#include`)
+struct SearchDirectoryList
+{
+    // A parent list that should also be searched
+    SearchDirectoryList*    parent = nullptr;
+
+    // Directories to be searched
+    List<SearchDirectory>   searchDirectories;
+};
+
+/* A helper class that builds basic include handling on top of searchDirectories/fileSystemExt and optionally a sourceManager */
+struct IncludeSystem
+{
+    IncludeSystem(SearchDirectoryList* searchDirectories, ISlangFileSystemExt* fileSystemExt, SourceManager* sourceManager = nullptr) :
+        m_searchDirectories(searchDirectories),
+        m_fileSystemExt(fileSystemExt),
+        m_sourceManager(sourceManager)
+    {
+    }
+
+    SlangResult findFile(const String& pathToInclude, const String& pathIncludedFrom, PathInfo& outPathInfo);
+    SlangResult findFile(SlangPathType fromPathType, const String& fromPath, const String& path, PathInfo& outPathInfo);
+    String simplifyPath(const String& path);
+    SlangResult loadFile(const PathInfo& pathInfo, ComPtr<ISlangBlob>& outBlob);
+
+    SlangResult findAndLoadFile(const String& pathToInclude, const String& pathIncludedFrom, PathInfo& outPathInfo, ComPtr<ISlangBlob>& outBlob);
+
+    SearchDirectoryList* getSearchDirectoryList() const { return m_searchDirectories; }
+    ISlangFileSystemExt* getFileSystem() const { return m_fileSystemExt; }
+    SourceManager* getSourceManager() const { return m_sourceManager; }
+
+protected:
+    
+    SearchDirectoryList* m_searchDirectories;
+    ISlangFileSystemExt* m_fileSystemExt;
+    SourceManager* m_sourceManager;                 ///< If not set, will not look up the content in the source manager
+};
+
+}
+
+#endif  // SLANG_INCLUDE_HANDLER_H