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/*
* Copyright 2016 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var examples = [
{
name: 'empty',
contents: '(module)',
js: '',
},
{
name: 'simple',
contents:
`(module
(func (export "addTwo") (param i32 i32) (result i32)
local.get 0
local.get 1
i32.add))
`,
js:
`const wasmInstance =
new WebAssembly.Instance(wasmModule, {});
const { addTwo } = wasmInstance.exports;
for (let i = 0; i < 10; i++) {
console.log(addTwo(i, i));
}
`,
},
{
name: 'factorial',
contents:
`(module
(func $fac (export "fac") (param f64) (result f64)
local.get 0
f64.const 1
f64.lt
if (result f64)
f64.const 1
else
local.get 0
local.get 0
f64.const 1
f64.sub
call $fac
f64.mul
end))
`,
js: `const wasmInstance =
new WebAssembly.Instance(wasmModule, {});
const { fac } = wasmInstance.exports;
for (let i = 1; i <= 15; i++) {
console.log(fac(i));
}
`,
},
{
name: 'stuff',
contents:
`(module
(import "foo" "bar" (func (param f32)))
(memory (data "hi"))
(type (func (param i32) (result i32)))
(start 1)
(table 0 1 anyfunc)
(func)
(func (type 1)
i32.const 42
drop)
(export "e" (func 1)))
`,
js: `const wasmInstance = new WebAssembly.Instance(wasmModule, {
foo: {
bar() {}
},
});
`,
},
{
name: 'mutable globals',
contents:
`(module
(import "env" "g" (global (mut i32)))
(func (export "f")
i32.const 100
global.set 0))
`,
js:
`
const g = new WebAssembly.Global({value: 'i32', mutable: true});
const wasmInstance = new WebAssembly.Instance(wasmModule, {env: {g}});
console.log('before: ' + g.value);
wasmInstance.exports.f();
console.log('after: ' + g.value);
`
},
{
name: "saturating float-to-int",
contents:
`(module
(func (export "f") (param f32) (result i32)
local.get 0
i32.trunc_sat_f32_s))`,
js:
`const wasmInstance = new WebAssembly.Instance(wasmModule);
const {f} = wasmInstance.exports;
console.log(f(Infinity));`
},
{
name: "sign extension",
contents:
`(module
(func (export "f") (param i32) (result i32)
local.get 0
i32.extend8_s))
`,
js:
`const wasmInstance = new WebAssembly.Instance(wasmModule);
const {f} = wasmInstance.exports;
console.log(f(0));
console.log(f(127));
console.log(f(128));
console.log(f(255));`
},
{
name: "multi value",
contents:
`(module
(func $swap (param i32 i32) (result i32 i32)
local.get 1
local.get 0)
(func (export "reverseSub") (param i32 i32) (result i32)
local.get 0
local.get 1
call $swap
i32.sub))
`,
js:
`const wasmInstance = new WebAssembly.Instance(wasmModule);
const {reverseSub} = wasmInstance.exports;
console.log(reverseSub(10, 3));`
},
{
name: "bulk memory",
contents:
`(module
(memory (export "mem") 1)
(func (export "fill") (param i32 i32 i32)
local.get 0
local.get 1
local.get 2
memory.fill))
`,
js:
`const wasmInstance = new WebAssembly.Instance(wasmModule);
const {fill, mem} = wasmInstance.exports;
fill(0, 13, 5);
fill(10, 77, 7);
fill(20, 255, 1000);
console.log(new Uint8Array(mem.buffer, 0, 50));
`
}
];
|
