v8/test/mjsunit/asm/int16array-negative-offset.js
Benedikt Meurer 19418d76df [x64] Fix optimization for certain checked load/stores.
BUG=chromium:439743
LOG=y
TEST=mjsunit
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/733893008

Cr-Commit-Position: refs/heads/master@{#25731}
2014-12-10 07:49:12 +00:00

43 lines
957 B
JavaScript

// Copyright 2014 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.
var stdlib = this;
var buffer = new ArrayBuffer(64 * 1024);
var foreign = {}
var m = (function Module(stdlib, foreign, heap) {
"use asm";
var MEM16 = new stdlib.Int16Array(heap);
function load(i) {
i = i|0;
i = MEM16[i >> 1]|0;
return i;
}
function store(i, v) {
i = i|0;
v = v|0;
MEM16[i >> 1] = v;
}
function load8(i) {
i = i|0;
i = MEM16[i + 8 >> 1]|0;
return i;
}
function store8(i, v) {
i = i|0;
v = v|0;
MEM16[i + 8 >> 1] = v;
}
return { load: load, store: store, load8: load8, store8: store8 };
})(stdlib, foreign, buffer);
assertEquals(0, m.load(-8));
assertEquals(0, m.load8(-16));
m.store(0, 42);
assertEquals(42, m.load8(-8));
m.store8(-8, 99);
assertEquals(99, m.load(0));
assertEquals(99, m.load8(-8));