1 files changed, 95 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/ldexp.spec.ts b/dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/ldexp.spec.ts
new file mode 100644
index 0000000000..b443aef4b6
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/ldexp.spec.ts
@@ -0,0 +1,95 @@
+export const description = `
+Execution tests for the 'ldexp' builtin function
+
+S is AbstractFloat, f32, f16
+T is S or vecN<S>
+
+K is AbstractInt, i32
+I is K or vecN<K>, where
+  I is a scalar if T is a scalar, or a vector when T is a vector
+
+@const fn ldexp(e1: T ,e2: I ) -> T
+Returns e1 * 2^e2. 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 { f32, i32, TypeF32, TypeI32 } from '../../../../../util/conversion.js';
+import { ldexpInterval } from '../../../../../util/f32_interval.js';
+import {
+  biasedRange,
+  fullF32Range,
+  fullI32Range,
+  quantizeToF32,
+  quantizeToI32,
+} from '../../../../../util/math.js';
+import { makeCaseCache } from '../../case_cache.js';
+import { allInputSources, Case, run } from '../../expression.js';
+
+import { builtin } from './builtin.js';
+
+export const g = makeTestGroup(GPUTest);
+
+const makeCase = (e1: number, e2: number): Case => {
+  // Due to the heterogeneous types of the params to ldexp (f32 & i32),
+  // makeBinaryToF32IntervalCase cannot be used here.
+  e1 = quantizeToF32(e1);
+  e2 = quantizeToI32(e2);
+  const expected = ldexpInterval(e1, e2);
+  return { input: [f32(e1), i32(e2)], expected };
+};
+
+export const d = makeCaseCache('ldexp', {
+  f32_non_const: () => {
+    const cases: Array<Case> = [];
+    fullF32Range().forEach(e1 => {
+      fullI32Range().forEach(e2 => {
+        cases.push(makeCase(e1, e2));
+      });
+    });
+    return cases;
+  },
+  f32_const: () => {
+    const cases: Array<Case> = [];
+    fullF32Range().forEach(e1 => {
+      biasedRange(-128, 128, 10).forEach(e2 => {
+        const val = e1 * Math.pow(2, e2);
+        if (val >= kValue.f32.negative.min && val <= kValue.f32.positive.max) {
+          cases.push(makeCase(e1, e2));
+        }
+      });
+    });
+    return cases;
+  },
+});
+
+g.test('abstract_float')
+  .specURL('https://www.w3.org/TR/WGSL/#float-builtin-functions')
+  .desc(
+    `
+`
+  )
+  .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('ldexp'), [TypeF32, TypeI32], 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();