1 files changed, 68 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/exp2.spec.ts b/dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/exp2.spec.ts
new file mode 100644
index 0000000000..e0321387c1
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/exp2.spec.ts
@@ -0,0 +1,68 @@
+export const description = `
+Execution tests for the 'exp2' builtin function
+
+S is AbstractFloat, f32, f16
+T is S or vecN<S>
+@const fn exp2(e: T ) -> T
+Returns 2 raised to the power e (e.g. 2^e). Component-wise when T is a vector.
+`;
+
+import { makeTestGroup } from '../../../../../../common/framework/test_group.js';
+import { GPUTest } from '../../../../../gpu_test.js';
+import { kValue } from '../../../../../util/constants.js';
+import { TypeF32 } from '../../../../../util/conversion.js';
+import { exp2Interval } from '../../../../../util/f32_interval.js';
+import { biasedRange, linearRange } from '../../../../../util/math.js';
+import { makeCaseCache } from '../../case_cache.js';
+import { allInputSources, generateUnaryToF32IntervalCases, run } from '../../expression.js';
+
+import { builtin } from './builtin.js';
+
+export const g = makeTestGroup(GPUTest);
+
+// floor(log2(max f32 value)) = 127, so exp2(127) will be within range of a f32, but exp2(128) will not
+// floor(ln(max f64 value)) = 1023, so exp2(1023) can be handled by the testing framework, but exp2(1024) will misbehave
+const inputs = [
+  0, // Returns 1 by definition
+  -128, // Returns subnormal value
+  kValue.f32.negative.min, // Closest to returning 0 as possible
+  ...biasedRange(kValue.f32.negative.max, -127, 100),
+  ...biasedRange(kValue.f32.positive.min, 127, 100),
+  ...linearRange(128, 1023, 10), // Overflows f32, but not f64
+];
+
+export const d = makeCaseCache('exp2', {
+  f32_const: () => {
+    return generateUnaryToF32IntervalCases(inputs, 'f32-only', exp2Interval);
+  },
+  f32_non_const: () => {
+    return generateUnaryToF32IntervalCases(inputs, 'unfiltered', exp2Interval);
+  },
+});
+
+g.test('abstract_float')
+  .specURL('https://www.w3.org/TR/WGSL/#float-builtin-functions')
+  .desc(`abstract float tests`)
+  .params(u =>
+    u.combine('inputSource', allInputSources).combine('vectorize', [undefined, 2, 3, 4] as const)
+  )
+  .unimplemented();
+
+g.test('f32')
+  .specURL('https://www.w3.org/TR/WGSL/#float-builtin-functions')
+  .desc(`f32 tests`)
+  .params(u =>
+    u.combine('inputSource', allInputSources).combine('vectorize', [undefined, 2, 3, 4] as const)
+  )
+  .fn(async t => {
+    const cases = await d.get(t.params.inputSource === 'const' ? 'f32_const' : 'f32_non_const');
+    await run(t, builtin('exp2'), [TypeF32], TypeF32, t.params, cases);
+  });
+
+g.test('f16')
+  .specURL('https://www.w3.org/TR/WGSL/#float-builtin-functions')
+  .desc(`f16 tests`)
+  .params(u =>
+    u.combine('inputSource', allInputSources).combine('vectorize', [undefined, 2, 3, 4] as const)
+  )
+  .unimplemented();