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}
110 lines
2.5 KiB
JavaScript
110 lines
2.5 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 MEMF32 = new stdlib.Float32Array(heap);
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var MEMF64 = new stdlib.Float64Array(heap);
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var store = stdlib.Atomics.store;
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var fround = stdlib.Math.fround;
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function storei8(i, x) {
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i = i | 0;
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x = x | 0;
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return store(MEM8, i, x)|0;
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}
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function storei16(i, x) {
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i = i | 0;
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x = x | 0;
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return store(MEM16, i, x)|0;
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}
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function storei32(i, x) {
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i = i | 0;
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x = x | 0;
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return store(MEM32, i, x)|0;
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}
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function storeu8(i, x) {
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i = i | 0;
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x = x >>> 0;
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return store(MEMU8, i, x)>>>0;
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}
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function storeu16(i, x) {
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i = i | 0;
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x = x >>> 0;
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return store(MEMU16, i, x)>>>0;
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}
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function storeu32(i, x) {
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i = i | 0;
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x = x >>> 0;
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return store(MEMU32, i, x)>>>0;
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}
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function storef32(i, x) {
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i = i | 0;
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x = fround(x);
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return fround(store(MEMF32, i, x));
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}
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function storef64(i, x) {
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i = i | 0;
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x = +x;
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return +store(MEMF64, i, x);
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}
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return {
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storei8: storei8,
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storei16: storei16,
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storei32: storei32,
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storeu8: storeu8,
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storeu16: storeu16,
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storeu32: storeu32,
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storef32: storef32,
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storef64: storef64
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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, oobValue) {
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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(10, f(0, 10), name);
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assertEquals(10, ta[0]);
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// out of bounds
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assertEquals(oobValue, f(-1, 0), name);
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assertEquals(oobValue, f(ta.length, 0), name);
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}
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testElementType(Int8Array, m.storei8, 0);
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testElementType(Int16Array, m.storei16, 0);
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testElementType(Int32Array, m.storei32, 0);
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testElementType(Uint8Array, m.storeu8, 0);
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testElementType(Uint16Array, m.storeu16, 0);
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testElementType(Uint32Array, m.storeu32, 0);
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testElementType(Float32Array, m.storef32, NaN);
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testElementType(Float64Array, m.storef64, NaN);
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