1 files changed, 40 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/unpack2x16snorm.spec.ts b/dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/unpack2x16snorm.spec.ts
new file mode 100644
index 0000000000..6b003ad5d2
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/unpack2x16snorm.spec.ts
@@ -0,0 +1,40 @@
+export const description = `
+Decomposes a 32-bit value into two 16-bit chunks, then reinterprets each chunk
+as a signed normalized floating point value.
+Component i of the result is max(v ÷ 32767, -1), where v is the interpretation
+of bits 16×i through 16×i+15 of e as a twos-complement signed integer.
+`;
+
+import { makeTestGroup } from '../../../../../../common/framework/test_group.js';
+import { GPUTest } from '../../../../../gpu_test.js';
+import { TypeF32, TypeU32, TypeVec } from '../../../../../util/conversion.js';
+import { unpack2x16snormInterval } from '../../../../../util/f32_interval.js';
+import { fullU32Range } from '../../../../../util/math.js';
+import { makeCaseCache } from '../../case_cache.js';
+import { allInputSources, generateU32ToVectorCases, run } from '../../expression.js';
+
+import { builtin } from './builtin.js';
+
+export const g = makeTestGroup(GPUTest);
+
+export const d = makeCaseCache('unpack2x16snorm', {
+  u32_const: () => {
+    return generateU32ToVectorCases(fullU32Range(), 'f32-only', unpack2x16snormInterval);
+  },
+  u32_non_const: () => {
+    return generateU32ToVectorCases(fullU32Range(), 'unfiltered', unpack2x16snormInterval);
+  },
+});
+
+g.test('unpack')
+  .specURL('https://www.w3.org/TR/WGSL/#unpack-builtin-functions')
+  .desc(
+    `
+@const fn unpack2x16snorm(e: u32) -> vec2<f32>
+`
+  )
+  .params(u => u.combine('inputSource', allInputSources))
+  .fn(async t => {
+    const cases = await d.get(t.params.inputSource === 'const' ? 'u32_const' : 'u32_non_const');
+    await run(t, builtin('unpack2x16snorm'), [TypeU32], TypeVec(2, TypeF32), t.params, cases);
+  });