v8/test/mjsunit/asm/atomics-sub.js
binji 88724ec4cb [Atomics] Fix atomic access index validation
BUG=v8:4737
LOG=n
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1676613002

Cr-Commit-Position: refs/heads/master@{#35074}
2016-03-25 21:52:52 +00:00

104 lines
2.4 KiB
JavaScript

// 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 sub = stdlib.Atomics.sub;
var fround = stdlib.Math.fround;
function subi8(i, x) {
i = i | 0;
x = x | 0;
return sub(MEM8, i, x)|0;
}
function subi16(i, x) {
i = i | 0;
x = x | 0;
return sub(MEM16, i, x)|0;
}
function subi32(i, x) {
i = i | 0;
x = x | 0;
return sub(MEM32, i, x)|0;
}
function subu8(i, x) {
i = i | 0;
x = x >>> 0;
return sub(MEMU8, i, x)>>>0;
}
function subu16(i, x) {
i = i | 0;
x = x >>> 0;
return sub(MEMU16, i, x)>>>0;
}
function subu32(i, x) {
i = i | 0;
x = x >>> 0;
return sub(MEMU32, i, x)>>>0;
}
return {
subi8: subi8,
subi16: subi16,
subi32: subi32,
subu8: subu8,
subu16: subu16,
subu32: subu32,
};
}
function clearArray() {
var ui8 = new Uint8Array(sab);
for (var i = 0; i < sab.byteLength; ++i) {
ui8[i] = 0;
}
}
function testElementType(taConstr, f, offset) {
clearArray();
var ta = new taConstr(sab, offset);
var name = Object.prototype.toString.call(ta);
ta[0] = 30;
assertEquals(30, f(0, 10), name);
assertEquals(20, ta[0]);
assertEquals(20, f(0, 10), name);
assertEquals(10, ta[0]);
// out of bounds
assertThrows(function() { f(-1, 0); });
assertThrows(function() { f(ta.length, 0); });
}
function testElement(m, offset) {
testElementType(Int8Array, m.subi8, offset);
testElementType(Int16Array, m.subi16, offset);
testElementType(Int32Array, m.subi32, offset);
testElementType(Uint8Array, m.subu8, offset);
testElementType(Uint16Array, m.subu16, offset);
testElementType(Uint32Array, m.subu32, 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);