Implement Atomics API

test/mjsunit/asm/atomics-store.js

+// 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 store = stdlib.Atomics.store;
+  var fround = stdlib.Math.fround;
+
+  function storei8(i, x) {
+    i = i | 0;
+    x = x | 0;
+    return store(MEM8, i, x)|0;
+  }
+
+  function storei16(i, x) {
+    i = i | 0;
+    x = x | 0;
+    return store(MEM16, i, x)|0;
+  }
+
+  function storei32(i, x) {
+    i = i | 0;
+    x = x | 0;
+    return store(MEM32, i, x)|0;
+  }
+
+  function storeu8(i, x) {
+    i = i | 0;
+    x = x >>> 0;
+    return store(MEMU8, i, x)>>>0;
+  }
+
+  function storeu16(i, x) {
+    i = i | 0;
+    x = x >>> 0;
+    return store(MEMU16, i, x)>>>0;
+  }
+
+  function storeu32(i, x) {
+    i = i | 0;
+    x = x >>> 0;
+    return store(MEMU32, i, x)>>>0;
+  }
+
+  function storef32(i, x) {
+    i = i | 0;
+    x = fround(x);
+    return fround(store(MEMF32, i, x));
+  }
+
+  function storef64(i, x) {
+    i = i | 0;
+    x = +x;
+    return +store(MEMF64, i, x);
+  }
+
+  return {
+    storei8: storei8,
+    storei16: storei16,
+    storei32: storei32,
+    storeu8: storeu8,
+    storeu16: storeu16,
+    storeu32: storeu32,
+    storef32: storef32,
+    storef64: storef64
+  };
+}
+
+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);
+  assertEquals(10, f(0, 10), name);
+  assertEquals(10, ta[0]);
+  // out of bounds
+  assertEquals(oobValue, f(-1, 0), name);
+  assertEquals(oobValue, f(ta.length, 0), name);
+}
+
+testElementType(Int8Array, m.storei8, 0);
+testElementType(Int16Array, m.storei16, 0);
+testElementType(Int32Array, m.storei32, 0);
+testElementType(Uint8Array, m.storeu8, 0);
+testElementType(Uint16Array, m.storeu16, 0);
+testElementType(Uint32Array, m.storeu32, 0);
+testElementType(Float32Array, m.storef32, NaN);
+testElementType(Float64Array, m.storef64, NaN);