dom/webgpu/tests/cts/checkout/src/webgpu/shader/execution/expression/call/builtin/atomicExchange.spec.ts


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export const description = `
Atomically stores the value v in the atomic object pointed to atomic_ptr and returns the original value stored in the atomic object.
`;

import { makeTestGroup } from '../../../../../../common/framework/test_group.js';
import { GPUTest } from '../../../../../gpu_test.js';

export const g = makeTestGroup(GPUTest);

g.test('stage')
  .specURL('https://www.w3.org/TR/WGSL/#atomic-rmw')
  .desc(
    `
Atomic built-in functions must not be used in a vertex shader stage.
`
  )
  .params(u => u.combine('stage', ['fragment', 'vertex', 'compute'] as const))
  .unimplemented();

g.test('exchange')
  .specURL('https://www.w3.org/TR/WGSL/#atomic-rmw')
  .desc(
    `
SC is storage or workgroup
T is i32 or u32

fn atomicExchange(atomic_ptr: ptr<SC, atomic<T>, read_write>, v: T) -> T
`
  )
  .params(u =>
    u.combine('SC', ['storage', 'uniform'] as const).combine('T', ['i32', 'u32'] as const)
  )
  .unimplemented();