Improvements to testing and ABI for CPU (#1057)

* WIP: Improving CPU performance/ABI

* Optionally output code on CPU for groupThreadID and groupID.

* Added ability to set compute dispatch size on command line for render-test.
Dispatch compute tests taking into account dispatch size.
Added test for semantics are working.

* Test using GroupRange.

* Fix problem with adding \n for externa diagnostic - to do it if there isn't a \n at the end. Change the ouput order (put result before) so last value is diagnostic string.

* Made GroupRange the default exposed CPU ABI entry point style.
Removed CPU_EXECUTE test style -as tested via the now cross platform render-test

* Split out execution from setup for execution to improve perf.

* For better code coverage/testing test all styles of CPU compute entry point.

* Improve documentation for ABI changes for CPU code.
Add 'expecting' to error message from review.

* Fix small typos.

1 files changed, 10 insertions, 3 deletions

diff --git a/prelude/slang-cpp-types.h b/prelude/slang-cpp-types.h
index c79465032..ab87c6208 100644
--- a/prelude/slang-cpp-types.h
+++ b/prelude/slang-cpp-types.h
@@ -226,21 +226,28 @@ struct Texture2D
 };
 
 /* Varying input for Compute */
-struct ComputeVaryingInput
+
+/* Used when running a single thread */
+struct ComputeThreadVaryingInput
 {
     uint3 groupID;
     uint3 groupThreadID;
 };
 
-struct GroupComputeVaryingInput
+struct ComputeVaryingInput
 {
     uint3 startGroupID;     ///< start groupID
     uint3 endGroupID;       ///< Non inclusive end groupID
 };
 
 /* Type that defines the uniform entry point params. The actual content of this type is dependent on the entry point parameters, and can be
-found via reflection or defined such that it matches the shader appropriately. */
+found via reflection or defined such that it matches the shader appropriately.
+*/
 struct UniformEntryPointParams;
+struct UniformState;
+
+typedef void(*ComputeThreadFunc)(ComputeThreadVaryingInput* varyingInput, UniformEntryPointParams* uniformEntryPointParams, UniformState* uniformState);
+typedef void(*ComputeFunc)(ComputeVaryingInput* varyingInput, UniformEntryPointParams* uniformEntryPointParams, UniformState* uniformState);
 
 #ifdef SLANG_PRELUDE_NAMESPACE
 }