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Diffstat (limited to 'deps/v8/test/mjsunit/math-floor-of-div.js')
-rw-r--r-- | deps/v8/test/mjsunit/math-floor-of-div.js | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/math-floor-of-div.js b/deps/v8/test/mjsunit/math-floor-of-div.js new file mode 100644 index 0000000000..e917182c71 --- /dev/null +++ b/deps/v8/test/mjsunit/math-floor-of-div.js @@ -0,0 +1,216 @@ +// Copyright 2012 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. + +// Flags: --allow-natives-syntax --nouse_inlining + +// Use this function as reference. Make sure it is not inlined. +function div(a, b) { + return a / b; +} + +var limit = 0x1000000; +var exhaustive_limit = 100; +var step = 10; +var values = [0x10000001, + 0x12345678, + -0x789abcdf, // 0x87654321 + 0x01234567, + 0x76543210, + -0x80000000, // 0x80000000 + 0x7fffffff, + -0x0fffffff, // 0xf0000001 + 0x00000010, + -0x01000000 // 0xff000000 + ]; + +function test_div() { + var c = 0; + for (var k = 0; k <= limit; k++) { + if (k > exhaustive_limit) { c += step; k += c; } + assertEquals(Math.floor(div(k, 1)), Math.floor(k / 1)); + assertEquals(Math.floor(div(k, -1)), Math.floor(k / -1)); + assertEquals(Math.floor(div(k, 2)), Math.floor(k / 2)); + assertEquals(Math.floor(div(k, -2)), Math.floor(k / -2)); + assertEquals(Math.floor(div(k, 3)), Math.floor(k / 3)); + assertEquals(Math.floor(div(k, -3)), Math.floor(k / -3)); + assertEquals(Math.floor(div(k, 4)), Math.floor(k / 4)); + assertEquals(Math.floor(div(k, -4)), Math.floor(k / -4)); + assertEquals(Math.floor(div(k, 5)), Math.floor(k / 5)); + assertEquals(Math.floor(div(k, -5)), Math.floor(k / -5)); + assertEquals(Math.floor(div(k, 6)), Math.floor(k / 6)); + assertEquals(Math.floor(div(k, -6)), Math.floor(k / -6)); + assertEquals(Math.floor(div(k, 7)), Math.floor(k / 7)); + assertEquals(Math.floor(div(k, -7)), Math.floor(k / -7)); + assertEquals(Math.floor(div(k, 8)), Math.floor(k / 8)); + assertEquals(Math.floor(div(k, -8)), Math.floor(k / -8)); + assertEquals(Math.floor(div(k, 9)), Math.floor(k / 9)); + assertEquals(Math.floor(div(k, -9)), Math.floor(k / -9)); + assertEquals(Math.floor(div(k, 10)), Math.floor(k / 10)); + assertEquals(Math.floor(div(k, -10)), Math.floor(k / -10)); + assertEquals(Math.floor(div(k, 11)), Math.floor(k / 11)); + assertEquals(Math.floor(div(k, -11)), Math.floor(k / -11)); + assertEquals(Math.floor(div(k, 12)), Math.floor(k / 12)); + assertEquals(Math.floor(div(k, -12)), Math.floor(k / -12)); + assertEquals(Math.floor(div(k, 13)), Math.floor(k / 13)); + assertEquals(Math.floor(div(k, -13)), Math.floor(k / -13)); + assertEquals(Math.floor(div(k, 14)), Math.floor(k / 14)); + assertEquals(Math.floor(div(k, -14)), Math.floor(k / -14)); + assertEquals(Math.floor(div(k, 15)), Math.floor(k / 15)); + assertEquals(Math.floor(div(k, -15)), Math.floor(k / -15)); + assertEquals(Math.floor(div(k, 16)), Math.floor(k / 16)); + assertEquals(Math.floor(div(k, -16)), Math.floor(k / -16)); + assertEquals(Math.floor(div(k, 17)), Math.floor(k / 17)); + assertEquals(Math.floor(div(k, -17)), Math.floor(k / -17)); + assertEquals(Math.floor(div(k, 18)), Math.floor(k / 18)); + assertEquals(Math.floor(div(k, -18)), Math.floor(k / -18)); + assertEquals(Math.floor(div(k, 19)), Math.floor(k / 19)); + assertEquals(Math.floor(div(k, -19)), Math.floor(k / -19)); + assertEquals(Math.floor(div(k, 20)), Math.floor(k / 20)); + assertEquals(Math.floor(div(k, -20)), Math.floor(k / -20)); + assertEquals(Math.floor(div(k, 21)), Math.floor(k / 21)); + assertEquals(Math.floor(div(k, -21)), Math.floor(k / -21)); + assertEquals(Math.floor(div(k, 22)), Math.floor(k / 22)); + assertEquals(Math.floor(div(k, -22)), Math.floor(k / -22)); + assertEquals(Math.floor(div(k, 23)), Math.floor(k / 23)); + assertEquals(Math.floor(div(k, -23)), Math.floor(k / -23)); + assertEquals(Math.floor(div(k, 24)), Math.floor(k / 24)); + assertEquals(Math.floor(div(k, -24)), Math.floor(k / -24)); + assertEquals(Math.floor(div(k, 25)), Math.floor(k / 25)); + assertEquals(Math.floor(div(k, -25)), Math.floor(k / -25)); + assertEquals(Math.floor(div(k, 125)), Math.floor(k / 125)); + assertEquals(Math.floor(div(k, -125)), Math.floor(k / -125)); + assertEquals(Math.floor(div(k, 625)), Math.floor(k / 625)); + assertEquals(Math.floor(div(k, -625)), Math.floor(k / -625)); + } + c = 0; + for (var k = 0; k <= limit; k++) { + if (k > exhaustive_limit) { c += step; k += c; } + assertEquals(Math.floor(div(-k, 1)), Math.floor(-k / 1)); + assertEquals(Math.floor(div(-k, -1)), Math.floor(-k / -1)); + assertEquals(Math.floor(div(-k, 2)), Math.floor(-k / 2)); + assertEquals(Math.floor(div(-k, -2)), Math.floor(-k / -2)); + assertEquals(Math.floor(div(-k, 3)), Math.floor(-k / 3)); + assertEquals(Math.floor(div(-k, -3)), Math.floor(-k / -3)); + assertEquals(Math.floor(div(-k, 4)), Math.floor(-k / 4)); + assertEquals(Math.floor(div(-k, -4)), Math.floor(-k / -4)); + assertEquals(Math.floor(div(-k, 5)), Math.floor(-k / 5)); + assertEquals(Math.floor(div(-k, -5)), Math.floor(-k / -5)); + assertEquals(Math.floor(div(-k, 6)), Math.floor(-k / 6)); + assertEquals(Math.floor(div(-k, -6)), Math.floor(-k / -6)); + assertEquals(Math.floor(div(-k, 7)), Math.floor(-k / 7)); + assertEquals(Math.floor(div(-k, -7)), Math.floor(-k / -7)); + assertEquals(Math.floor(div(-k, 8)), Math.floor(-k / 8)); + assertEquals(Math.floor(div(-k, -8)), Math.floor(-k / -8)); + assertEquals(Math.floor(div(-k, 9)), Math.floor(-k / 9)); + assertEquals(Math.floor(div(-k, -9)), Math.floor(-k / -9)); + assertEquals(Math.floor(div(-k, 10)), Math.floor(-k / 10)); + assertEquals(Math.floor(div(-k, -10)), Math.floor(-k / -10)); + assertEquals(Math.floor(div(-k, 11)), Math.floor(-k / 11)); + assertEquals(Math.floor(div(-k, -11)), Math.floor(-k / -11)); + assertEquals(Math.floor(div(-k, 12)), Math.floor(-k / 12)); + assertEquals(Math.floor(div(-k, -12)), Math.floor(-k / -12)); + assertEquals(Math.floor(div(-k, 13)), Math.floor(-k / 13)); + assertEquals(Math.floor(div(-k, -13)), Math.floor(-k / -13)); + assertEquals(Math.floor(div(-k, 14)), Math.floor(-k / 14)); + assertEquals(Math.floor(div(-k, -14)), Math.floor(-k / -14)); + assertEquals(Math.floor(div(-k, 15)), Math.floor(-k / 15)); + assertEquals(Math.floor(div(-k, -15)), Math.floor(-k / -15)); + assertEquals(Math.floor(div(-k, 16)), Math.floor(-k / 16)); + assertEquals(Math.floor(div(-k, -16)), Math.floor(-k / -16)); + assertEquals(Math.floor(div(-k, 17)), Math.floor(-k / 17)); + assertEquals(Math.floor(div(-k, -17)), Math.floor(-k / -17)); + assertEquals(Math.floor(div(-k, 18)), Math.floor(-k / 18)); + assertEquals(Math.floor(div(-k, -18)), Math.floor(-k / -18)); + assertEquals(Math.floor(div(-k, 19)), Math.floor(-k / 19)); + assertEquals(Math.floor(div(-k, -19)), Math.floor(-k / -19)); + assertEquals(Math.floor(div(-k, 20)), Math.floor(-k / 20)); + assertEquals(Math.floor(div(-k, -20)), Math.floor(-k / -20)); + assertEquals(Math.floor(div(-k, 21)), Math.floor(-k / 21)); + assertEquals(Math.floor(div(-k, -21)), Math.floor(-k / -21)); + assertEquals(Math.floor(div(-k, 22)), Math.floor(-k / 22)); + assertEquals(Math.floor(div(-k, -22)), Math.floor(-k / -22)); + assertEquals(Math.floor(div(-k, 23)), Math.floor(-k / 23)); + assertEquals(Math.floor(div(-k, -23)), Math.floor(-k / -23)); + assertEquals(Math.floor(div(-k, 24)), Math.floor(-k / 24)); + assertEquals(Math.floor(div(-k, -24)), Math.floor(-k / -24)); + assertEquals(Math.floor(div(-k, 25)), Math.floor(-k / 25)); + assertEquals(Math.floor(div(-k, -25)), Math.floor(-k / -25)); + assertEquals(Math.floor(div(-k, 125)), Math.floor(-k / 125)); + assertEquals(Math.floor(div(-k, -125)), Math.floor(-k / -125)); + assertEquals(Math.floor(div(-k, 625)), Math.floor(-k / 625)); + assertEquals(Math.floor(div(-k, -625)), Math.floor(-k / -625)); + } + // Test for edge cases. + // Use (values[key] | 0) to force the integer type. + for (var i = 0; i < values.length; i++) { + for (var j = 0; j < values.length; j++) { + assertEquals(Math.floor(div((values[i] | 0), (values[j] | 0))), + Math.floor((values[i] | 0) / (values[j] | 0))); + assertEquals(Math.floor(div(-(values[i] | 0), (values[j] | 0))), + Math.floor(-(values[i] | 0) / (values[j] | 0))); + assertEquals(Math.floor(div((values[i] | 0), -(values[j] | 0))), + Math.floor((values[i] | 0) / -(values[j] | 0))); + assertEquals(Math.floor(div(-(values[i] | 0), -(values[j] | 0))), + Math.floor(-(values[i] | 0) / -(values[j] | 0))); + } + } +} + +test_div(); +%OptimizeFunctionOnNextCall(test_div); +test_div(); + +// Test for negative zero and overflow. +// Separate the tests to prevent deoptimizations from making the other optimized +// test unreachable. + +function IsNegativeZero(x) { + assertTrue(x == 0); // Is 0 or -0. + var y = 1 / x; + assertFalse(isFinite(y)); + return y < 0; +} + +function test_div_deopt_minus_zero() { + var zero_in_array = [0]; + assertTrue(IsNegativeZero(Math.floor((zero_in_array[0] | 0) / -1))); +} + +function test_div_deopt_overflow() { + // We box the value in an array to avoid constant propagation. + var min_int_in_array = [-2147483648]; + // We use '| 0' to force the representation to int32. + assertEquals(-min_int_in_array[0], + Math.floor((min_int_in_array[0] | 0) / -1)); +} + +test_div_deopt_minus_zero(); +test_div_deopt_overflow(); +%OptimizeFunctionOnNextCall(test_div_deopt_minus_zero); +%OptimizeFunctionOnNextCall(test_div_deopt_overflow); +test_div_deopt_minus_zero(); +test_div_deopt_overflow(); |