81fe5b3c45
BUG=497295 LOG=n Review URL: https://codereview.chromium.org/1422533009 Cr-Commit-Position: refs/heads/master@{#32064}
111 lines
3.0 KiB
JavaScript
111 lines
3.0 KiB
JavaScript
// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --harmony-sharedarraybuffer
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function Module(stdlib, foreign, heap, offset) {
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"use asm";
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var MEM8 = new stdlib.Int8Array(heap, offset);
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var MEM16 = new stdlib.Int16Array(heap, offset);
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var MEM32 = new stdlib.Int32Array(heap, offset);
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var MEMU8 = new stdlib.Uint8Array(heap, offset);
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var MEMU16 = new stdlib.Uint16Array(heap, offset);
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var MEMU32 = new stdlib.Uint32Array(heap, offset);
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var compareExchange = stdlib.Atomics.compareExchange;
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var fround = stdlib.Math.fround;
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function compareExchangei8(i, o, n) {
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i = i | 0;
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o = o | 0;
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n = n | 0;
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return compareExchange(MEM8, i, o, n)|0;
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}
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function compareExchangei16(i, o, n) {
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i = i | 0;
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o = o | 0;
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n = n | 0;
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return compareExchange(MEM16, i, o, n)|0;
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}
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function compareExchangei32(i, o, n) {
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i = i | 0;
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o = o | 0;
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n = n | 0;
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return compareExchange(MEM32, i, o, n)|0;
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}
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function compareExchangeu8(i, o, n) {
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i = i | 0;
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o = o >>> 0;
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n = n >>> 0;
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return compareExchange(MEMU8, i, o, n)>>>0;
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}
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function compareExchangeu16(i, o, n) {
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i = i | 0;
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o = o >>> 0;
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n = n >>> 0;
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return compareExchange(MEMU16, i, o, n)>>>0;
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}
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function compareExchangeu32(i, o, n) {
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i = i | 0;
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o = o >>> 0;
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n = n >>> 0;
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return compareExchange(MEMU32, i, o, n)>>>0;
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}
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return {
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compareExchangei8: compareExchangei8,
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compareExchangei16: compareExchangei16,
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compareExchangei32: compareExchangei32,
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compareExchangeu8: compareExchangeu8,
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compareExchangeu16: compareExchangeu16,
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compareExchangeu32: compareExchangeu32,
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};
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}
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function clearArray() {
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var ui8 = new Uint8Array(sab);
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for (var i = 0; i < sab.byteLength; ++i) {
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ui8[i] = 0;
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}
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}
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function testElementType(taConstr, f, oobValue, offset) {
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clearArray();
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var ta = new taConstr(sab, offset);
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var name = Object.prototype.toString.call(ta);
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assertEquals(0, ta[0]);
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assertEquals(0, f(0, 0, 50), name);
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assertEquals(50, ta[0]);
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// Value is not equal to 0, so compareExchange won't store 100
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assertEquals(50, f(0, 0, 100), name);
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assertEquals(50, ta[0]);
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// out of bounds
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assertEquals(oobValue, f(-1, 0, 0), name);
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assertEquals(oobValue, f(ta.length, 0, 0), name);
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}
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function testElement(m, offset) {
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testElementType(Int8Array, m.compareExchangei8, 0, offset);
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testElementType(Int16Array, m.compareExchangei16, 0, offset);
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testElementType(Int32Array, m.compareExchangei32, 0, offset);
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testElementType(Uint8Array, m.compareExchangeu8, 0, offset);
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testElementType(Uint16Array, m.compareExchangeu16, 0, offset);
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testElementType(Uint32Array, m.compareExchangeu32, 0, offset);
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}
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var offset = 0;
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var sab = new SharedArrayBuffer(16);
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var m1 = Module(this, {}, sab, offset);
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testElement(m1, offset);
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offset = 32;
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sab = new SharedArrayBuffer(64);
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var m2 = Module(this, {}, sab, offset);
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testElement(m2, offset);
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