63 lines
2.2 KiB
JavaScript
63 lines
2.2 KiB
JavaScript
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// Copyright 2010 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Test overflow checks in optimized code.
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function testMul(a, b) {
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a *= 2;
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b *= 2;
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if (a < 1 && b < 1) {
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return a * b;
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}
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}
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for (var i=0; i<10000000; i++) testMul(0,0);
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assertEquals(4611686018427388000, testMul(-0x40000000, -0x40000000));
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function testAdd(a, b) {
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a *= 2;
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b *= 2;
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if (a < 1 && b < 1) {
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return a + b;
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}
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}
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for (var i=0; i<10000000; i++) testAdd(0,0);
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assertEquals(-4294967296, testAdd(-0x40000000, -0x40000000));
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function testSub(a, b) {
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a *= 2;
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b *= 2;
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if (b == 2) {print(a); print(b);}
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if (a < 1 && b < 3) {
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return a - b;
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}
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}
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for (var i=0; i<10000000; i++) testSub(0,0);
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assertEquals(-2147483650, testSub(-0x40000000, 1));
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