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* Removed inappropriate-once.slang - the test is no longer valid when a file is loaded and has a unique identity by default.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>

3 files changed, 25 insertions, 2 deletions

diff --git a/tools/slang-test/options.cpp b/tools/slang-test/options.cpp
index 27b759a0e..875f9ef0b 100644
--- a/tools/slang-test/options.cpp
+++ b/tools/slang-test/options.cpp
@@ -266,6 +266,16 @@ static bool _isSubCommand(const char* arg)
                 return res;
             }
         }
+        else if (strcmp(arg, "-nv-api-path") == 0)
+        {
+            if (argCursor == argEnd)
+            {
+                stdError.print("error: expected operand for '%s'\n", arg);
+                return SLANG_FAIL;
+            }
+
+            optionsOut->nvAPIPath = *argCursor++;
+        }
         else
         {
             stdError.print("unknown option '%s'\n", arg);
diff --git a/tools/slang-test/options.h b/tools/slang-test/options.h
index a8c2e3852..ddd905e64 100644
--- a/tools/slang-test/options.h
+++ b/tools/slang-test/options.h
@@ -98,6 +98,8 @@ struct Options
     // The adapter to use. If empty will match first found adapter.
     Slang::String adapter;
 
+    Slang::String nvAPIPath;
+
         /// Parse the args, report any errors into stdError, and write the results into optionsOut
     static SlangResult parse(int argc, char** argv, TestCategorySet* categorySet, Slang::WriterHelper stdError, Options* optionsOut);
 };
diff --git a/tools/slang-test/slang-test-main.cpp b/tools/slang-test/slang-test-main.cpp
index 9ef013aad..c6562ed86 100644
--- a/tools/slang-test/slang-test-main.cpp
+++ b/tools/slang-test/slang-test-main.cpp
@@ -3191,8 +3191,6 @@ SlangResult innerMain(int argc, char** argv)
     TestContext context;
     SLANG_RETURN_ON_FAIL(SLANG_FAILED(context.init()))
 
-    TestToolUtil::setSessionDefaultPrelude(argv[0], context.getSession());
-
     auto& categorySet = context.categorySet;
 
     // Set up our test categories here
@@ -3272,6 +3270,19 @@ SlangResult innerMain(int argc, char** argv)
     
     Options& options = context.options;
 
+    // Set up the prelude
+    {
+        TestToolUtil::PreludeInfo info;
+        info.exePath = argv[0];
+
+        if (options.nvAPIPath.getLength())
+        {
+            info.nvAPIPath = options.nvAPIPath.getBuffer();
+        }
+
+        TestToolUtil::setSessionDefaultPrelude(info, context.getSession());
+    }
+
     if (options.outputMode == TestOutputMode::TeamCity)
     {
         // On TeamCity CI there is an issue with unix/linux targets where test system may be different from the build system