WIP Atomics

test/mjsunit/asm/atomics-load.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-shared-typed-arrays
+
+function Module(stdlib, foreign, heap) {
+  "use asm";
+  var MEM8 = new stdlib.SharedInt8Array(heap);
+  var MEM16 = new stdlib.SharedInt16Array(heap);
+  var MEM32 = new stdlib.SharedInt32Array(heap);
+  var MEMF32 = new stdlib.SharedFloat32Array(heap);
+  var MEMF64 = new stdlib.SharedFloat64Array(heap);
+  var load = stdlib.Atomics.load;
+
+  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 loadf32(i) {
+    i = i | 0;
+    return +load(MEMF32, i);
+  }
+
+  function loadf64(i) {
+    i = i | 0;
+    return +load(MEMF64, i);
+  }
+
+  return {
+    loadi8: loadi8,
+    loadi16: loadi16,
+    loadi32: loadi32,
+    loadf32: loadf32,
+    loadf64: loadf64
+  };
+}
+
+var sab = new SharedArrayBuffer(16);
+var m = Module(this, {}, sab);
+
+function testElementType(taConstr, f, oobValue) {
+  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(SharedInt8Array, m.loadi8, 0);
+testElementType(SharedInt16Array, m.loadi16, 0);
+testElementType(SharedInt32Array, m.loadi32, 0);
+testElementType(SharedFloat32Array, m.loadf32, NaN);
+testElementType(SharedFloat64Array, m.loadf64, NaN);