1 files changed, 23 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/dpdx.spec.ts b/dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/dpdx.spec.ts
new file mode 100644
index 0000000000..287a51c699
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/dpdx.spec.ts
@@ -0,0 +1,23 @@
+export const description = `
+Execution tests for the 'dpdx' builtin function
+
+T is f32 or vecN<f32>
+fn dpdx(e:T) -> T
+Partial derivative of e with respect to window x coordinates.
+The result is the same as either dpdxFine(e) or dpdxCoarse(e).
+
+`;
+
+import { makeTestGroup } from '../../../../../../common/framework/test_group.js';
+import { GPUTest } from '../../../../../gpu_test.js';
+import { allInputSources } from '../../expression.js';
+
+export const g = makeTestGroup(GPUTest);
+
+g.test('f32')
+  .specURL('https://www.w3.org/TR/WGSL/#derivative-builtin-functions')
+  .desc(`f32 tests`)
+  .params(u =>
+    u.combine('inputSource', allInputSources).combine('vectorize', [undefined, 2, 3, 4] as const)
+  )
+  .unimplemented();