196d6aeec1
Having both flags is tedious, and it is unlikely you'd ever want them separately. R=jarin@chromium.org Review URL: https://codereview.chromium.org/1304163010 Cr-Commit-Position: refs/heads/master@{#30523}
95 lines
2.0 KiB
JavaScript
95 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-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 sub = stdlib.Atomics.sub;
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var fround = stdlib.Math.fround;
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function subi8(i, x) {
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i = i | 0;
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x = x | 0;
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return sub(MEM8, i, x)|0;
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}
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function subi16(i, x) {
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i = i | 0;
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x = x | 0;
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return sub(MEM16, i, x)|0;
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}
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function subi32(i, x) {
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i = i | 0;
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x = x | 0;
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return sub(MEM32, i, x)|0;
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}
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function subu8(i, x) {
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i = i | 0;
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x = x >>> 0;
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return sub(MEMU8, i, x)>>>0;
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}
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function subu16(i, x) {
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i = i | 0;
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x = x >>> 0;
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return sub(MEMU16, i, x)>>>0;
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}
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function subu32(i, x) {
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i = i | 0;
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x = x >>> 0;
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return sub(MEMU32, i, x)>>>0;
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}
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return {
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subi8: subi8,
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subi16: subi16,
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subi32: subi32,
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subu8: subu8,
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subu16: subu16,
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subu32: subu32,
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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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ta[0] = 30;
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assertEquals(30, f(0, 10), name);
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assertEquals(20, ta[0]);
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assertEquals(20, f(0, 10), name);
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assertEquals(10, 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.subi8);
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testElementType(Int16Array, m.subi16);
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testElementType(Int32Array, m.subi32);
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testElementType(Uint8Array, m.subu8);
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testElementType(Uint16Array, m.subu16);
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testElementType(Uint32Array, m.subu32);
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