CPU compute testing on non windows targets (#1045)

* WIP: Refactor of CPUCompute and stand alone cpu-render-test

* Fix compilation on CygWin.

* Make CPU compute tests run on non windows targets.

* Check that C/C++ compiler is available for CPU compute.

* Fix some tabbing issues.

* Add -fPIC on gfx

* Use dxcompiler_47.dll from slang-binaries on windows.

* make https for git module slang-binaries

* Fix comment in premake5.lua around d3dcompiler_47.dll

* Add resources to the CPUComputeUtil::Context to keep in scope.

* Fixes problem compiling on cygwin where dx12 is included in build of gfx lib.

1 files changed, 28 insertions, 6 deletions

diff --git a/tools/slang-test/slang-test-main.cpp b/tools/slang-test/slang-test-main.cpp
index af78dbb14..3b14b353b 100644
--- a/tools/slang-test/slang-test-main.cpp
+++ b/tools/slang-test/slang-test-main.cpp
@@ -607,7 +607,7 @@ static SlangResult _extractRenderTestRequirements(const CommandLine& cmdLine, Te
     // to render-test what renderer will be used. 
     // That a similar logic has to be kept inside the implementation of render-test and both this
     // and render-test will have to be kept in sync.
-   
+
     bool useDxil = cmdLine.findArgIndex(UnownedStringSlice::fromLiteral("-use-dxil")) >= 0;
 
     bool usePassthru = false;
@@ -751,11 +751,26 @@ static SlangResult _extractReflectionTestRequirements(const CommandLine& cmdLine
     return SLANG_OK;
 }
 
+static SlangResult _tryUseCPURenderTest(TestContext* context, CommandLine& ioCmdLine)
+{
+    String exeName = Path::getFileNameWithoutExt(ioCmdLine.m_executable);
+
+    if (exeName == "render-test")
+    {
+        bool useCPU = ioCmdLine.findArgIndex(UnownedStringSlice::fromLiteral("-cpu")) >= 0;
+        if (useCPU)
+        {
+            ioCmdLine.setExecutablePath(Path::combine(context->options.binDir,  String("cpu-render-test") + ProcessUtil::getExecutableSuffix()));
+        }
+    }
+    return SLANG_OK;
+}
+
 static SlangResult _extractTestRequirements(const CommandLine& cmdLine, TestRequirements* ioInfo)
 {
     String exeName = Path::getFileNameWithoutExt(cmdLine.m_executable);
 
-    if (exeName == "render-test")
+    if (exeName == "render-test" || exeName == "cpu-render-test")
     {
         return _extractRenderTestRequirements(cmdLine, ioInfo);
     }
@@ -787,10 +802,11 @@ static RenderApiFlags _getAvailableRenderApiFlags(TestContext* context)
 
             if (apiType == RenderApiType::CPU)
             {
-                // TODO(JS): Only enable CPU on Windows for now
-#if SLANG_WINDOWS_FAMILY
-                availableRenderApiFlags |= RenderApiFlags(1) << int(apiType);
-#endif
+                // Check that the session has the generic C/CPP compiler availability - which is all we should need for CPU target
+                if (SLANG_SUCCEEDED(spSessionCheckPassThroughSupport(context->getSession(), SLANG_PASS_THROUGH_GENERIC_C_CPP)))
+                {
+                    availableRenderApiFlags |= RenderApiFlags(1) << int(apiType);
+                }
                 continue;
             }
 
@@ -809,6 +825,8 @@ static RenderApiFlags _getAvailableRenderApiFlags(TestContext* context)
                 builder << "-" << RenderApiUtil::getApiName(apiType);
                 cmdLine.addArg(builder);
 
+                _tryUseCPURenderTest(context, cmdLine);
+
                 // Run the render-test tool and see if the device could startup
                 ExecuteResult exeRes;
                 if (SLANG_SUCCEEDED(spawnAndWaitSharedLibrary(context, "device-startup", cmdLine, exeRes))
@@ -2046,6 +2064,8 @@ TestResult runComputeComparisonImpl(TestContext* context, TestInput& input, cons
     auto actualOutputFile = outputStem + ".actual.txt";
     cmdLine.addArg(actualOutputFile);
 
+    _tryUseCPURenderTest(context, cmdLine);
+
     if (context->isExecuting())
     {
         // clear the stale actual output file first. This will allow us to detect error if render-test fails and outputs nothing.
@@ -2161,6 +2181,8 @@ TestResult doRenderComparisonTestRun(TestContext* context, TestInput& input, cha
     cmdLine.addArg("-o");
     cmdLine.addArg(outputStem + outputKind + ".png");
 
+    _tryUseCPURenderTest(context, cmdLine);
+
     ExecuteResult exeRes;
     TEST_RETURN_ON_DONE(spawnAndWait(context, outputStem, input.spawnType, cmdLine, exeRes));