e59e40a354
This is behind the flag "--harmony-atomics", and it only works on SharedArrayBuffers. This implementation only includes the runtime functions. The TurboFan implementation will be next. The draft spec for Atomics can be found here: https://docs.google.com/document/d/1NDGA_gZJ7M7w1Bh8S0AoDyEqwDdRh4uSoTPSNn77PFk BUG= LOG=n Review URL: https://codereview.chromium.org/1162503002 Cr-Commit-Position: refs/heads/master@{#28796}
94 lines
2.0 KiB
JavaScript
94 lines
2.0 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-atomics --harmony-sharedarraybuffer
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function Module(stdlib, foreign, heap) {
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"use asm";
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var MEM8 = new stdlib.Int8Array(heap);
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var MEM16 = new stdlib.Int16Array(heap);
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var MEM32 = new stdlib.Int32Array(heap);
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var MEMU8 = new stdlib.Uint8Array(heap);
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var MEMU16 = new stdlib.Uint16Array(heap);
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var MEMU32 = new stdlib.Uint32Array(heap);
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var xor = stdlib.Atomics.xor;
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var fround = stdlib.Math.fround;
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function xori8(i, x) {
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i = i | 0;
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x = x | 0;
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return xor(MEM8, i, x)|0;
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}
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function xori16(i, x) {
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i = i | 0;
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x = x | 0;
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return xor(MEM16, i, x)|0;
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}
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function xori32(i, x) {
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i = i | 0;
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x = x | 0;
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return xor(MEM32, i, x)|0;
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}
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function xoru8(i, x) {
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i = i | 0;
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x = x >>> 0;
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return xor(MEMU8, i, x)>>>0;
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}
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function xoru16(i, x) {
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i = i | 0;
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x = x >>> 0;
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return xor(MEMU16, i, x)>>>0;
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}
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function xoru32(i, x) {
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i = i | 0;
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x = x >>> 0;
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return xor(MEMU32, i, x)>>>0;
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}
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return {
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xori8: xori8,
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xori16: xori16,
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xori32: xori32,
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xoru8: xoru8,
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xoru16: xoru16,
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xoru32: xoru32,
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};
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}
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var sab = new SharedArrayBuffer(16);
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var m = Module(this, {}, sab);
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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) {
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clearArray();
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var ta = new taConstr(sab);
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var name = Object.prototype.toString.call(ta);
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assertEquals(0, f(0, 0xf), name);
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assertEquals(0xf, ta[0]);
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assertEquals(0xf, f(0, 0x11), name);
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assertEquals(0x1e, ta[0]);
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// out of bounds
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assertEquals(0, f(-1, 0), name);
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assertEquals(0, f(ta.length, 0), name);
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}
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testElementType(Int8Array, m.xori8);
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testElementType(Int16Array, m.xori16);
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testElementType(Int32Array, m.xori32);
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testElementType(Uint8Array, m.xoru8);
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testElementType(Uint16Array, m.xoru16);
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testElementType(Uint32Array, m.xoru32);
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