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1// META: global=window,dedicatedworker,jsshell
2// META: script=/wasm/jsapi/wasm-module-builder.js
3// META: script=/wasm/jsapi/assertions.js
4
5const type_if_fi = makeSig([kWasmF64, kWasmI32], [kWasmI32, kWasmF64]);
6
7promise_test(async () => {
8  const builder = new WasmModuleBuilder();
9
10  builder
11    .addFunction("swap", type_if_fi)
12    .addBody([
13        kExprLocalGet, 1,
14        kExprLocalGet, 0,
15        kExprReturn,
16    ])
17    .exportFunc();
18
19  const buffer = builder.toBuffer();
20
21  const result = await WebAssembly.instantiate(buffer);
22  const swapped = result.instance.exports.swap(4.2, 7);
23  assert_true(Array.isArray(swapped));
24  assert_equals(Object.getPrototypeOf(swapped), Array.prototype);
25  assert_array_equals(swapped, [7, 4.2]);
26}, "multiple return values from wasm to js");
27
28promise_test(async () => {
29  const builder = new WasmModuleBuilder();
30
31  const swap = builder
32    .addFunction("swap", type_if_fi)
33    .addBody([
34        kExprLocalGet, 1,
35        kExprLocalGet, 0,
36        kExprReturn,
37    ]);
38  builder
39    .addFunction("callswap", kSig_i_v)
40    .addBody([
41        ...wasmF64Const(4.2),
42        ...wasmI32Const(7),
43        kExprCallFunction, swap.index,
44        kExprDrop,
45        kExprReturn,
46    ])
47    .exportFunc();
48
49  const buffer = builder.toBuffer();
50
51  const result = await WebAssembly.instantiate(buffer);
52  const swapped = result.instance.exports.callswap();
53  assert_equals(swapped, 7);
54}, "multiple return values inside wasm");
55
56promise_test(async () => {
57  const builder = new WasmModuleBuilder();
58
59  const fnIndex = builder.addImport("module", "fn", type_if_fi);
60  builder
61    .addFunction("callfn", kSig_i_v)
62    .addBody([
63        ...wasmF64Const(4.2),
64        ...wasmI32Const(7),
65        kExprCallFunction, fnIndex,
66        kExprDrop,
67        kExprReturn,
68    ])
69    .exportFunc();
70
71  const buffer = builder.toBuffer();
72
73  const actual = [];
74  const imports = {
75    "module": {
76      fn(f32, i32) {
77        assert_equals(f32, 4.2);
78        assert_equals(i32, 7);
79        const result = [2, 7.3];
80        let i = 0;
81        return {
82          get [Symbol.iterator]() {
83            actual.push("@@iterator getter");
84            return function iterator() {
85              actual.push("@@iterator call");
86              return {
87                get next() {
88                  actual.push("next getter");
89                  return function next(...args) {
90                    assert_array_equals(args, []);
91                    let j = ++i;
92                    actual.push(`next call ${j}`);
93                    if (j > result.length) {
94                      return {
95                        get done() {
96                          actual.push(`done call ${j}`);
97                          return true;
98                        }
99                      };
100                    }
101                    return {
102                      get done() {
103                        actual.push(`done call ${j}`);
104                        return false;
105                      },
106                      get value() {
107                        actual.push(`value call ${j}`);
108                        return {
109                          get valueOf() {
110                            actual.push(`valueOf get ${j}`);
111                            return function() {
112                              actual.push(`valueOf call ${j}`);
113                              return result[j - 1];
114                            };
115                          }
116                        };
117                      }
118                    };
119                  };
120                }
121              };
122            }
123          },
124        };
125      },
126    }
127  };
128
129  const { instance } = await WebAssembly.instantiate(buffer, imports);
130  const result = instance.exports.callfn();
131  assert_equals(result, 2);
132  assert_array_equals(actual, [
133    "@@iterator getter",
134    "@@iterator call",
135    "next getter",
136    "next call 1",
137    "done call 1",
138    "value call 1",
139    "next call 2",
140    "done call 2",
141    "value call 2",
142    "next call 3",
143    "done call 3",
144    "valueOf get 1",
145    "valueOf call 1",
146    "valueOf get 2",
147    "valueOf call 2",
148  ]);
149}, "multiple return values from js to wasm");
150