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sourceRevisionAtLastExport: 33f2fb0e53d135f0ee17cfccd9d993eb2a6f47de targetRevisionAtLastExport: 31340cbd9add103f586d501b0c3354b7b182abc0
192 lines
7.1 KiB
JavaScript
192 lines
7.1 KiB
JavaScript
// Copyright 2011 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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// Flags: --allow-natives-syntax
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var test_id = 0;
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function testRound(expect, input) {
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// Make source code different on each invocation to make
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// sure it gets optimized each time.
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var doRound = new Function('input',
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'"' + (test_id++) + '";return Math.round(input)');
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assertEquals(expect, doRound(input));
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assertEquals(expect, doRound(input));
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assertEquals(expect, doRound(input));
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%OptimizeFunctionOnNextCall(doRound);
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assertEquals(expect, doRound(input));
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// Force the Math.round() representation to double to exercise the associated
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// optimized code.
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var doRoundToDouble = new Function('input',
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'"' + (test_id++) + '";return Math.round(input) + -0.0');
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assertEquals(expect, doRoundToDouble(input));
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assertEquals(expect, doRoundToDouble(input));
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assertEquals(expect, doRoundToDouble(input));
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%OptimizeFunctionOnNextCall(doRoundToDouble);
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assertEquals(expect, doRoundToDouble(input));
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}
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testRound(0, 0);
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testRound(-0, -0);
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testRound(Infinity, Infinity);
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testRound(-Infinity, -Infinity);
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testRound(NaN, NaN);
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// Regression test for a bug where a negative zero coming from Math.round
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// was not properly handled by other operations.
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function roundsum(i, n) {
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var ret = Math.round(n);
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while (--i > 0) {
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ret += Math.round(n);
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}
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return ret;
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}
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assertEquals(-0, roundsum(1, -0));
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%OptimizeFunctionOnNextCall(roundsum);
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// The optimized function will deopt. Run it with enough iterations to try
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// to optimize via OSR (triggering the bug).
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assertEquals(-0, roundsum(100000, -0));
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testRound(1, 0.5);
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testRound(1, 0.7);
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testRound(1, 1);
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testRound(1, 1.1);
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testRound(1, 1.49999);
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testRound(-0, -0.5);
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testRound(-1, -0.5000000000000001);
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testRound(-1, -0.7);
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testRound(-1, -1);
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testRound(-1, -1.1);
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testRound(-1, -1.49999);
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testRound(-1, -1.5);
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testRound(9007199254740990, 9007199254740990);
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testRound(9007199254740991, 9007199254740991);
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testRound(-9007199254740990, -9007199254740990);
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testRound(-9007199254740991, -9007199254740991);
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testRound(Number.MAX_VALUE, Number.MAX_VALUE);
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testRound(-Number.MAX_VALUE, -Number.MAX_VALUE);
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testRound(Number.MAX_SAFE_INTEGER, Number.MAX_SAFE_INTEGER);
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testRound(Number.MAX_SAFE_INTEGER + 1, Number.MAX_SAFE_INTEGER + 1);
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testRound(Number.MAX_SAFE_INTEGER + 2, Number.MAX_SAFE_INTEGER + 2);
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testRound(Number.MAX_SAFE_INTEGER + 3, Number.MAX_SAFE_INTEGER + 3);
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testRound(Number.MAX_SAFE_INTEGER + 4, Number.MAX_SAFE_INTEGER + 4);
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testRound(Number.MIN_SAFE_INTEGER, Number.MIN_SAFE_INTEGER);
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testRound(Number.MIN_SAFE_INTEGER - 1, Number.MIN_SAFE_INTEGER - 1);
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testRound(Number.MIN_SAFE_INTEGER - 2, Number.MIN_SAFE_INTEGER - 2);
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testRound(Number.MIN_SAFE_INTEGER - 3, Number.MIN_SAFE_INTEGER - 3);
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testRound(536870911, 536870910.5);
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testRound(536870911, 536870911);
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testRound(536870911, 536870911.4);
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testRound(536870912, 536870911.5);
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testRound(536870912, 536870912);
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testRound(536870912, 536870912.4);
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testRound(536870913, 536870912.5);
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testRound(536870913, 536870913);
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testRound(536870913, 536870913.4);
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testRound(1073741823, 1073741822.5);
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testRound(1073741823, 1073741823);
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testRound(1073741823, 1073741823.4);
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testRound(1073741824, 1073741823.5);
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testRound(1073741824, 1073741824);
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testRound(1073741824, 1073741824.4);
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testRound(1073741825, 1073741824.5);
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testRound(2147483647, 2147483646.5);
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testRound(2147483647, 2147483647);
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testRound(2147483647, 2147483647.4);
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testRound(2147483648, 2147483647.5);
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testRound(2147483648, 2147483648);
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testRound(2147483648, 2147483648.4);
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testRound(2147483649, 2147483648.5);
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// Tests based on WebKit LayoutTests
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testRound(0, 0.4);
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testRound(-0, -0.4);
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testRound(-0, -0.5);
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testRound(1, 0.6);
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testRound(-1, -0.6);
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testRound(2, 1.5);
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testRound(2, 1.6);
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testRound(-2, -1.6);
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testRound(8640000000000000, 8640000000000000);
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testRound(8640000000000001, 8640000000000001);
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testRound(8640000000000002, 8640000000000002);
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testRound(9007199254740990, 9007199254740990);
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testRound(9007199254740991, 9007199254740991);
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testRound(1.7976931348623157e+308, 1.7976931348623157e+308);
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testRound(-8640000000000000, -8640000000000000);
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testRound(-8640000000000001, -8640000000000001);
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testRound(-8640000000000002, -8640000000000002);
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testRound(-9007199254740990, -9007199254740990);
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testRound(-9007199254740991, -9007199254740991);
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testRound(-1.7976931348623157e+308, -1.7976931348623157e+308);
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testRound(Infinity, Infinity);
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testRound(-Infinity, -Infinity);
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// Some special double number cases.
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var ulp = Math.pow(2, -1022 - 52);
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var max_denormal = (Math.pow(2, 52) - 1) * ulp;
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var min_normal = Math.pow(2, -1022);
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var max_fraction = Math.pow(2, 52) - 0.5;
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var min_nonfraction = Math.pow(2, 52);
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var max_non_infinite = Number.MAX_VALUE;
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var max_smi31 = Math.pow(2,30) - 1;
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var min_smi31 = -Math.pow(2,30);
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var max_smi32 = Math.pow(2,31) - 1;
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var min_smi32 = -Math.pow(2,31);
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testRound(0, ulp);
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testRound(0, max_denormal);
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testRound(0, min_normal);
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testRound(0, 0.49999999999999994);
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testRound(1, 0.5);
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testRound(Math.pow(2,52), max_fraction);
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testRound(min_nonfraction, min_nonfraction);
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testRound(max_non_infinite, max_non_infinite);
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testRound(max_smi31, max_smi31 - 0.5);
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testRound(max_smi31 + 1, max_smi31 + 0.5);
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testRound(max_smi32, max_smi32 - 0.5);
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testRound(max_smi32 + 1, max_smi32 + 0.5);
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testRound(-0, -ulp);
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testRound(-0, -max_denormal);
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testRound(-0, -min_normal);
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testRound(-0, -0.49999999999999994);
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testRound(-0, -0.5);
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testRound(-Math.pow(2,52)+1, -max_fraction);
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testRound(-min_nonfraction, -min_nonfraction);
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testRound(-max_non_infinite, -max_non_infinite);
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testRound(min_smi31, min_smi31 - 0.5);
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testRound(min_smi31 + 1, min_smi31 + 0.5);
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testRound(min_smi32, min_smi32 - 0.5);
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testRound(min_smi32 + 1, min_smi32 + 0.5);
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