mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
2.2 KiB
63 lines
2.2 KiB
14 years ago
|
// Copyright 2010 the V8 project authors. All rights reserved.
|
||
|
// Redistribution and use in source and binary forms, with or without
|
||
|
// modification, are permitted provided that the following conditions are
|
||
|
// met:
|
||
|
//
|
||
|
// * Redistributions of source code must retain the above copyright
|
||
|
// notice, this list of conditions and the following disclaimer.
|
||
|
// * Redistributions in binary form must reproduce the above
|
||
|
// copyright notice, this list of conditions and the following
|
||
|
// disclaimer in the documentation and/or other materials provided
|
||
|
// with the distribution.
|
||
|
// * Neither the name of Google Inc. nor the names of its
|
||
|
// contributors may be used to endorse or promote products derived
|
||
|
// from this software without specific prior written permission.
|
||
|
//
|
||
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
||
|
// Test overflow checks in optimized code.
|
||
|
function testMul(a, b) {
|
||
|
a *= 2;
|
||
|
b *= 2;
|
||
|
if (a < 1 && b < 1) {
|
||
|
return a * b;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
for (var i=0; i<1000000; i++) testMul(0,0);
|
||
|
assertEquals(4611686018427388000, testMul(-0x40000000, -0x40000000));
|
||
|
|
||
|
function testAdd(a, b) {
|
||
|
a *= 2;
|
||
|
b *= 2;
|
||
|
if (a < 1 && b < 1) {
|
||
|
return a + b;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
for (var i=0; i<1000000; i++) testAdd(0,0);
|
||
|
assertEquals(-4294967296, testAdd(-0x40000000, -0x40000000));
|
||
|
|
||
|
|
||
|
function testSub(a, b) {
|
||
|
a *= 2;
|
||
|
b *= 2;
|
||
|
if (b == 2) {print(a); print(b);}
|
||
|
if (a < 1 && b < 3) {
|
||
|
return a - b;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
for (var i=0; i<1000000; i++) testSub(0,0);
|
||
|
assertEquals(-2147483650, testSub(-0x40000000, 1));
|