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+// |reftest| skip-if(!this.hasOwnProperty('Atomics')||!this.hasOwnProperty('SharedArrayBuffer')||(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('arm64-simulator'))) -- Atomics,SharedArrayBuffer is not enabled unconditionally, ARM64 Simulator cannot emulate atomics
+// Copyright (C) 2017 Mozilla Corporation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-atomics.add
+description: Test Atomics.add on arrays that allow atomic operations.
+includes: [testAtomics.js, testTypedArray.js]
+features: [ArrayBuffer, Atomics, DataView, SharedArrayBuffer, Symbol, TypedArray]
+---*/
+
+const sab = new SharedArrayBuffer(1024);
+const ab = new ArrayBuffer(16);
+const views = nonClampedIntArrayConstructors.slice();
+
+testWithTypedArrayConstructors(function(TA) {
+ // Make it interesting - use non-zero byteOffsets and non-zero indexes.
+
+ const view = new TA(sab, 32, 20);
+ const control = new TA(ab, 0, 2);
+
+ // Add positive number
+ view[8] = 0;
+ assert.sameValue(Atomics.add(view, 8, 10), 0, 'Atomics.add(view, 8, 10) returns 0');
+ assert.sameValue(view[8], 10, 'The value of view[8] is 10');
+
+ // Add negative number
+ assert.sameValue(Atomics.add(view, 8, -5), 10, 'Atomics.add(view, 8, -5) returns 10');
+ assert.sameValue(view[8], 5, 'The value of view[8] is 5');
+
+ view[3] = -5;
+ control[0] = -5;
+ assert.sameValue(Atomics.add(view, 3, 0), control[0],
+ 'Atomics.add(view, 3, 0) returns the value of `control[0]` (-5)');
+
+ control[0] = 12345;
+ view[3] = 12345;
+ assert.sameValue(Atomics.add(view, 3, 0), control[0],
+ 'Atomics.add(view, 3, 0) returns the value of `control[0]` (12345)');
+
+ control[0] = 123456789;
+ view[3] = 123456789;
+ assert.sameValue(Atomics.add(view, 3, 0), control[0],
+ 'Atomics.add(view, 3, 0) returns the value of `control[0]` (123456789)');
+
+ // In-bounds boundary cases for indexing
+ testWithAtomicsInBoundsIndices(function(IdxGen) {
+ let Idx = IdxGen(view);
+ view.fill(0);
+ // Atomics.store() computes an index from Idx in the same way as other
+ // Atomics operations, not quite like view[Idx].
+ Atomics.store(view, Idx, 37);
+ assert.sameValue(Atomics.add(view, Idx, 0), 37, 'Atomics.add(view, Idx, 0) returns 37');
+ });
+}, views);
+
+reportCompare(0, 0);