1 files changed, 29 insertions, 0 deletions
diff --git a/tests/autodiff-dstdlib/dstdlib-dot.slang b/tests/autodiff-dstdlib/dstdlib-dot.slang
new file mode 100644
index 000000000..4a4e2a78b
--- /dev/null
+++ b/tests/autodiff-dstdlib/dstdlib-dot.slang
@@ -0,0 +1,29 @@
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+
+typedef DifferentialPair<float3> dpfloat3;
+
+[BackwardDifferentiable]
+float diffDot(float3 x, float3 y)
+{
+    return dot(x, y);
+}
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
+{
+    {
+        dpfloat3 dpx = dpfloat3(float3(-0.5, 0.7, 0.8), float3(0.0, 0.0, 0.0));
+        dpfloat3 dpy = dpfloat3(float3(0.0, 0.0, 1.0), float3(0.0, 0.0, 0.0));
+        __bwd_diff(diffDot)(dpx, dpy, 1.0);
+        outputBuffer[0] = dpx.d[0]; // Expect: 0.000000
+        outputBuffer[1] = dpx.d[1]; // Expect: 0.000000
+        outputBuffer[2] = dpx.d[2]; // Expect: 1.000000
+        outputBuffer[3] = dpy.d[0]; // Expect: -0.500000
+        outputBuffer[4] = dpy.d[1]; // Expect: 0.700000
+        outputBuffer[5] = dpy.d[2]; // Expect: 0.800000
+    }
+}