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      1 // Copyright 2011 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 // Flags: --max-semi-space-size=1 --allow-natives-syntax
     29 
     30 var test_id = 0;
     31 
     32 function testFloor(expect, input) {
     33   var test = new Function('n',
     34                           '"' + (test_id++) + '";return Math.floor(n)');
     35   assertEquals(expect, test(input));
     36   assertEquals(expect, test(input));
     37   assertEquals(expect, test(input));
     38   %OptimizeFunctionOnNextCall(test);
     39   assertEquals(expect, test(input));
     40 
     41   var test_double_output = new Function(
     42       'n',
     43       '"' + (test_id++) + '";return Math.floor(n) + -0.0');
     44   assertEquals(expect, test_double_output(input));
     45   assertEquals(expect, test_double_output(input));
     46   assertEquals(expect, test_double_output(input));
     47   %OptimizeFunctionOnNextCall(test_double_output);
     48   assertEquals(expect, test_double_output(input));
     49 }
     50 
     51 function zero() {
     52   var x = 0.5;
     53   return (function() { return x - 0.5; })();
     54 }
     55 
     56 function test() {
     57   // 2^30 is a smi boundary.
     58   var two_30 = 1 << 30;
     59 
     60   testFloor(two_30, two_30);
     61   testFloor(two_30, two_30 + 0.1);
     62   testFloor(two_30, two_30 + 0.5);
     63   testFloor(two_30, two_30 + 0.7);
     64 
     65   testFloor(two_30 - 1, two_30 - 1);
     66   testFloor(two_30 - 1, two_30 - 1 + 0.1);
     67   testFloor(two_30 - 1, two_30 - 1 + 0.5);
     68   testFloor(two_30 - 1, two_30 - 1 + 0.7);
     69 
     70   testFloor(-two_30, -two_30);
     71   testFloor(-two_30, -two_30 + 0.1);
     72   testFloor(-two_30, -two_30 + 0.5);
     73   testFloor(-two_30, -two_30 + 0.7);
     74 
     75   testFloor(-two_30 + 1, -two_30 + 1);
     76   testFloor(-two_30 + 1, -two_30 + 1 + 0.1);
     77   testFloor(-two_30 + 1, -two_30 + 1 + 0.5);
     78   testFloor(-two_30 + 1, -two_30 + 1 + 0.7);
     79 }
     80 
     81 
     82 // Test in a loop to cover the custom IC and GC-related issues.
     83 for (var i = 0; i < 100; i++) {
     84   test();
     85 }
     86