CPU uniform entry point params (#1041)

* * Made entry point parameters a separate entry point
* Made CPUMemoryBinding work with entry point parameters/initialize constant buffers
* Added isCPUOnly to bindings, because entry point parameters do not layout like constant buffer
* entry-point-uniform.slang works on CPU

* EntryPointParams -> UniformEntryPointParams
Updated CPU documentation.

* Update cpu-target.md to removed completed issues.

* Only allocate CPU buffers if the size is > 0.
Small update to cpu-target doc.

1 files changed, 5 insertions, 3 deletions

diff --git a/tools/render-test/render-test-main.cpp b/tools/render-test/render-test-main.cpp
index ef3613240..440ba9c82 100644
--- a/tools/render-test/render-test-main.cpp
+++ b/tools/render-test/render-test-main.cpp
@@ -294,6 +294,7 @@ static SlangResult _compile(SlangSession* session, const String& sourcePath, Opt
 
     // Parse the layout
     layout.parse(sourceText.getBuffer());
+    layout.updateForTarget(input.target);
 
     // Setup SourceInfo
     ShaderCompileRequest::SourceInfo sourceInfo;
@@ -420,7 +421,7 @@ static SlangResult _doCPUCompute(SlangSession* session, const String& sourcePath
     auto request = output.compileOutput.request;
 
     struct UniformState;
-    typedef void(*Func)(CPPPrelude::ComputeVaryingInput* varyingInput, UniformState* uniformState);
+    typedef void(*Func)(CPPPrelude::ComputeVaryingInput* varyingInput, CPPPrelude::UniformEntryPointParams* params, UniformState* uniformState);
 
     auto reflection = (slang::ShaderReflection*) spGetReflection(request);
 
@@ -442,7 +443,7 @@ static SlangResult _doCPUCompute(SlangSession* session, const String& sourcePath
     }
 
     CPUMemoryBinding binding;
-    binding.init(reflection);
+    SLANG_RETURN_ON_FAIL(binding.init(reflection, 0));
 
     List<CPUMemoryBinding::Buffer> buffers;
 
@@ -645,6 +646,7 @@ static SlangResult _doCPUCompute(SlangSession* session, const String& sourcePath
 
     {
         UniformState* uniformState = (UniformState*)binding.m_rootBuffer.m_data;
+        CPPPrelude::UniformEntryPointParams* params = (CPPPrelude::UniformEntryPointParams*)binding.m_entryPointBuffer.m_data;
 
         CPPPrelude::ComputeVaryingInput varying;
         varying.groupID = {};
@@ -659,7 +661,7 @@ static SlangResult _doCPUCompute(SlangSession* session, const String& sourcePath
                 {
                     varying.groupThreadID.x = x;
 
-                    func(&varying, uniformState);
+                    func(&varying, params, uniformState);
                 }
             }
         }