e59e40a354
This is behind the flag "--harmony-atomics", and it only works on SharedArrayBuffers. This implementation only includes the runtime functions. The TurboFan implementation will be next. The draft spec for Atomics can be found here: https://docs.google.com/document/d/1NDGA_gZJ7M7w1Bh8S0AoDyEqwDdRh4uSoTPSNn77PFk BUG= LOG=n Review URL: https://codereview.chromium.org/1162503002 Cr-Commit-Position: refs/heads/master@{#28796}
103 lines
2.3 KiB
JavaScript
103 lines
2.3 KiB
JavaScript
// Copyright 2015 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
// Flags: --harmony-atomics --harmony-sharedarraybuffer
|
|
|
|
function Module(stdlib, foreign, heap) {
|
|
"use asm";
|
|
var MEM8 = new stdlib.Int8Array(heap);
|
|
var MEM16 = new stdlib.Int16Array(heap);
|
|
var MEM32 = new stdlib.Int32Array(heap);
|
|
var MEMU8 = new stdlib.Uint8Array(heap);
|
|
var MEMU16 = new stdlib.Uint16Array(heap);
|
|
var MEMU32 = new stdlib.Uint32Array(heap);
|
|
var MEMF32 = new stdlib.Float32Array(heap);
|
|
var MEMF64 = new stdlib.Float64Array(heap);
|
|
var load = stdlib.Atomics.load;
|
|
var fround = stdlib.Math.fround;
|
|
|
|
function loadi8(i) {
|
|
i = i | 0;
|
|
return load(MEM8, i)|0;
|
|
}
|
|
|
|
function loadi16(i) {
|
|
i = i | 0;
|
|
return load(MEM16, i)|0;
|
|
}
|
|
|
|
function loadi32(i) {
|
|
i = i | 0;
|
|
return load(MEM32, i)|0;
|
|
}
|
|
|
|
function loadu8(i) {
|
|
i = i | 0;
|
|
return load(MEMU8, i)>>>0;
|
|
}
|
|
|
|
function loadu16(i) {
|
|
i = i | 0;
|
|
return load(MEMU16, i)>>>0;
|
|
}
|
|
|
|
function loadu32(i) {
|
|
i = i | 0;
|
|
return load(MEMU32, i)>>>0;
|
|
}
|
|
|
|
function loadf32(i) {
|
|
i = i | 0;
|
|
return fround(load(MEMF32, i));
|
|
}
|
|
|
|
function loadf64(i) {
|
|
i = i | 0;
|
|
return +load(MEMF64, i);
|
|
}
|
|
|
|
return {
|
|
loadi8: loadi8,
|
|
loadi16: loadi16,
|
|
loadi32: loadi32,
|
|
loadu8: loadu8,
|
|
loadu16: loadu16,
|
|
loadu32: loadu32,
|
|
loadf32: loadf32,
|
|
loadf64: loadf64
|
|
};
|
|
}
|
|
|
|
var sab = new SharedArrayBuffer(16);
|
|
var m = Module(this, {}, sab);
|
|
|
|
function clearArray() {
|
|
var ui8 = new Uint8Array(sab);
|
|
for (var i = 0; i < sab.byteLength; ++i) {
|
|
ui8[i] = 0;
|
|
}
|
|
}
|
|
|
|
function testElementType(taConstr, f, oobValue) {
|
|
clearArray();
|
|
|
|
var ta = new taConstr(sab);
|
|
var name = Object.prototype.toString.call(ta);
|
|
ta[0] = 10;
|
|
assertEquals(10, f(0), name);
|
|
assertEquals(0, f(1), name);
|
|
// out of bounds
|
|
assertEquals(oobValue, f(-1), name);
|
|
assertEquals(oobValue, f(ta.length), name);
|
|
}
|
|
|
|
testElementType(Int8Array, m.loadi8, 0);
|
|
testElementType(Int16Array, m.loadi16, 0);
|
|
testElementType(Int32Array, m.loadi32, 0);
|
|
testElementType(Uint8Array, m.loadu8, 0);
|
|
testElementType(Uint16Array, m.loadu16, 0);
|
|
testElementType(Uint32Array, m.loadu32, 0);
|
|
testElementType(Float32Array, m.loadf32, NaN);
|
|
testElementType(Float64Array, m.loadf64, NaN);
|