Int64 atomic add RWByteAddressBuffer support (#1504)

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* Removed inappropriate-once.slang - the test is no longer valid when a file is loaded and has a unique identity by default.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

* Int64 atomic add RwByteAddressBuffer support.

* Fix typo in stdlib for int atomic ByteAddressBuffer.

* Small fixes to int64 atomic test.

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

3 files changed, 37 insertions, 1 deletions

diff --git a/tests/slang-extension/atomic-float-byte-address-buffer.slang b/tests/slang-extension/atomic-float-byte-address-buffer.slang
index e6e2268ff..d89ee8bd1 100644
--- a/tests/slang-extension/atomic-float-byte-address-buffer.slang
+++ b/tests/slang-extension/atomic-float-byte-address-buffer.slang
@@ -7,7 +7,7 @@
 // Disabled because requires nvapi to work
 // Note for this feature we require dxc and we can force that with -use-dxil
 //DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-d3d12 -compute -use-dxil
-//TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute -use-dxil
+//TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute
 
 //TEST_INPUT:ubuffer(data=[0.1 0.2 0.3 0.4]):out,name=outputBuffer
 RWByteAddressBuffer outputBuffer;
diff --git a/tests/slang-extension/atomic-int64-byte-address-buffer.slang b/tests/slang-extension/atomic-int64-byte-address-buffer.slang
new file mode 100644
index 000000000..22f21408c
--- /dev/null
+++ b/tests/slang-extension/atomic-int64-byte-address-buffer.slang
@@ -0,0 +1,28 @@
+// No atomic support on CPU
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute 
+// No support for int64_t on DX11
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-slang -compute
+// No support for int64_t on fxc - we need SM6.0 and dxil
+// https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/hlsl-shader-model-6-0-features-for-direct3d-12
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12
+// Disable for now, because can only test when NVAPI is available, and it is not by default.
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12 -profile cs_6_0 -use-dxil 
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute
+//TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute
+
+//TEST_INPUT:ubuffer(data=[0 1 2 3 4 5 6 7]):out,name=outputBuffer
+RWByteAddressBuffer outputBuffer;
+
+[numthreads(16, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{    
+    uint tid = dispatchThreadID.x;
+    int idx = (tid & 3) ^ (tid >> 2); 
+
+    int64_t previousValue = 0;
+    outputBuffer.InterlockedAddI64((idx << 3), 1, previousValue);
+    
+    int anotherIdx = tid >> 2;
+    outputBuffer.InterlockedAddI64(anotherIdx << 3, 3);
+}
+
diff --git a/tests/slang-extension/atomic-int64-byte-address-buffer.slang.expected.txt b/tests/slang-extension/atomic-int64-byte-address-buffer.slang.expected.txt
new file mode 100644
index 000000000..811dc1584
--- /dev/null
+++ b/tests/slang-extension/atomic-int64-byte-address-buffer.slang.expected.txt
@@ -0,0 +1,8 @@
+10
+1
+12
+3
+14
+5
+16
+7