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// 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-sharedarraybuffer
function Module(stdlib, foreign, heap, offset) {
"use asm";
var MEM8 = new stdlib.Int8Array(heap, offset);
var MEM16 = new stdlib.Int16Array(heap, offset);
var MEM32 = new stdlib.Int32Array(heap, offset);
var MEMU8 = new stdlib.Uint8Array(heap, offset);
var MEMU16 = new stdlib.Uint16Array(heap, offset);
var MEMU32 = new stdlib.Uint32Array(heap, offset);
var compareExchange = stdlib.Atomics.compareExchange;
var fround = stdlib.Math.fround;
function compareExchangei8(i, o, n) {
i = i | 0;
o = o | 0;
n = n | 0;
return compareExchange(MEM8, i, o, n)|0;
}
function compareExchangei16(i, o, n) {
i = i | 0;
o = o | 0;
n = n | 0;
return compareExchange(MEM16, i, o, n)|0;
}
function compareExchangei32(i, o, n) {
i = i | 0;
o = o | 0;
n = n | 0;
return compareExchange(MEM32, i, o, n)|0;
}
function compareExchangeu8(i, o, n) {
i = i | 0;
o = o >>> 0;
n = n >>> 0;
return compareExchange(MEMU8, i, o, n)>>>0;
}
function compareExchangeu16(i, o, n) {
i = i | 0;
o = o >>> 0;
n = n >>> 0;
return compareExchange(MEMU16, i, o, n)>>>0;
}
function compareExchangeu32(i, o, n) {
i = i | 0;
o = o >>> 0;
n = n >>> 0;
return compareExchange(MEMU32, i, o, n)>>>0;
}
return {
compareExchangei8: compareExchangei8,
compareExchangei16: compareExchangei16,
compareExchangei32: compareExchangei32,
compareExchangeu8: compareExchangeu8,
compareExchangeu16: compareExchangeu16,
compareExchangeu32: compareExchangeu32,
};
}
function clearArray() {
var ui8 = new Uint8Array(sab);
for (var i = 0; i < sab.byteLength; ++i) {
ui8[i] = 0;
}
}
function testElementType(taConstr, f, oobValue, offset) {
clearArray();
var ta = new taConstr(sab, offset);
var name = Object.prototype.toString.call(ta);
assertEquals(0, ta[0]);
assertEquals(0, f(0, 0, 50), name);
assertEquals(50, ta[0]);
// Value is not equal to 0, so compareExchange won't store 100
assertEquals(50, f(0, 0, 100), name);
assertEquals(50, ta[0]);
// out of bounds
assertThrows(function() { f(-1, 0, 0); });
assertThrows(function() { f(ta.length, 0, 0); });
}
function testElement(m, offset) {
testElementType(Int8Array, m.compareExchangei8, 0, offset);
testElementType(Int16Array, m.compareExchangei16, 0, offset);
testElementType(Int32Array, m.compareExchangei32, 0, offset);
testElementType(Uint8Array, m.compareExchangeu8, 0, offset);
testElementType(Uint16Array, m.compareExchangeu16, 0, offset);
testElementType(Uint32Array, m.compareExchangeu32, 0, offset);
}
var offset = 0;
var sab = new SharedArrayBuffer(16);
var m1 = Module(this, {}, sab, offset);
testElement(m1, offset);
offset = 32;
sab = new SharedArrayBuffer(64);
var m2 = Module(this, {}, sab, offset);
testElement(m2, offset);
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