Simple test for the "saturate" operation (#62)

Author: bogner

test/Feature/HLSLLib/saturate.test

@@ -0,0 +1,59 @@
+#--- source.hlsl
+
+StructuredBuffer<float4> In : register(t0);
+RWStructuredBuffer<float4> Out : register(u1);
+
+[numthreads(1,1,1)]
+void main() {
+  Out[0] = saturate(In[0]);
+  Out[1].x = saturate(In[1].x);
+  Out[1].yzw = saturate(In[1].yzw);
+  Out[2].xy = saturate(In[0].xy);
+}
+
+//--- pipeline.yaml
+
+---
+Shaders:
+  - Stage: Compute
+    Entry: main
+    DispatchSize: [1, 1, 1]
+Buffers:
+  - Name: In
+    Format: Float32
+    Stride: 16
+    Data: [ 0, 1.0, -1.0, -2.0, 84.0, -inf, nan, inf ]
+  - Name: Out
+    Format: Float32
+    Stride: 16
+    ZeroInitSize: 48
+DescriptorSets:
+  - Resources:
+    - Name: In
+      Kind: StructuredBuffer
+      DirectXBinding:
+        Register: 0
+        Space: 0
+      VulkanBinding:
+        Binding: 0
+    - Name: Out
+      Kind: RWStructuredBuffer
+      DirectXBinding:
+        Register: 1
+        Space: 0
+      VulkanBinding:
+        Binding: 1
+...
+#--- end
+
+# UNSUPPORTED: Clang-Vulkan
+# RUN: split-file %s %t
+# RUN: %dxc_target -T cs_6_5 -Fo %t.o %t/source.hlsl
+# RUN: %offloader %t/pipeline.yaml %t.o | FileCheck %s
+
+# CHECK: - Name: In
+# CHECK:   Format: Float32
+
+# CHECK: - Name: Out
+# CHECK:   Format: Float32
+# CHECK:   Data: [ 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0 ]