1 files changed, 59 insertions, 0 deletions
diff --git a/tests/compute/global-generic-value-param.slang b/tests/compute/global-generic-value-param.slang
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+++ b/tests/compute/global-generic-value-param.slang
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+// global-generic-value-param.slang
+
+//TEST(compute):COMPARE_COMPUTE:
+
+// This is a basic test of support for global generic
+// value parameters: explicit named parameters at global
+// scope that can be used to generate specialized kernel
+// code based on different values.
+
+// We start by declaring a global generic value parameter:
+//
+// Note: only `int` parameters are expected to work for now.
+// Note: the default `= 0` intializer isn't used right now.
+//
+__generic_value_param kOffset : uint = 0;
+
+// For the test framework, we also need to specify what
+// value we want to specialize to.
+//
+// Note: this value (7) will be fed in to the compiler API
+// as a specialization argument, and will not be visible
+// to the compiler when it initially compiles the code
+// to IR.
+//
+//TEST_INPUT: globalSpecializationArg 7
+
+// Next we will declare a buffer of data just so that we
+// can index into something and make the shader logic a
+// bit less trivial.
+//
+RWStructuredBuffer<uint> vals;
+//TEST_INPUT: ubuffer(data=[0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15], stride=4):dxbinding(0),glbinding(0)
+
+// The core test function will use the `kOffset` value
+// we declared above along with the input value (the
+// thread ID) to index into our buffer of values and
+// compute a result. All of the math here is just to
+// make the result easy to validate by eye.
+//
+uint test(uint value)
+{
+	return value * 16 + vals[(value + kOffset) & 0xF];
+}
+
+// And finally we have the boilerplate cruft that almost
+// all of our compute tests use.
+
+//TEST_INPUT: ubuffer(data=[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0], stride=4):dxbinding(0),glbinding(1),out
+RWStructuredBuffer<uint> outputBuffer;
+
+[numthreads(16, 1, 1)]
+void computeMain(
+	uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+	uint tid = dispatchThreadID.x;
+	uint inVal = tid;
+	uint outVal = test(inVal);
+	outputBuffer[tid] = outVal;
+}
+\ No newline at end of file