// 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 // Helper function assertInstance(o, f) { assertSame(o.constructor, f); assertInstanceof(o, f); } // This is a regression test for overlapping key and value registers. function f(a) { a[0] = 0; a[1] = 0; } var a = new Int32Array(2); for (var i = 0; i < 5; i++) { f(a); } %OptimizeFunctionOnNextCall(f); f(a); assertEquals(0, a[0]); assertEquals(0, a[1]); // Test derivation from an ArrayBuffer var ab = new ArrayBuffer(12); assertInstance(ab, ArrayBuffer); var derived_uint8 = new Uint8Array(ab); assertInstance(derived_uint8, Uint8Array); assertSame(ab, derived_uint8.buffer); assertEquals(12, derived_uint8.length); assertEquals(12, derived_uint8.byteLength); assertEquals(0, derived_uint8.byteOffset); assertEquals(1, derived_uint8.BYTES_PER_ELEMENT); var derived_uint8_2 = new Uint8Array(ab,7); assertInstance(derived_uint8_2, Uint8Array); assertSame(ab, derived_uint8_2.buffer); assertEquals(5, derived_uint8_2.length); assertEquals(5, derived_uint8_2.byteLength); assertEquals(7, derived_uint8_2.byteOffset); assertEquals(1, derived_uint8_2.BYTES_PER_ELEMENT); var derived_int16 = new Int16Array(ab); assertInstance(derived_int16, Int16Array); assertSame(ab, derived_int16.buffer); assertEquals(6, derived_int16.length); assertEquals(12, derived_int16.byteLength); assertEquals(0, derived_int16.byteOffset); assertEquals(2, derived_int16.BYTES_PER_ELEMENT); var derived_int16_2 = new Int16Array(ab,6); assertInstance(derived_int16_2, Int16Array); assertSame(ab, derived_int16_2.buffer); assertEquals(3, derived_int16_2.length); assertEquals(6, derived_int16_2.byteLength); assertEquals(6, derived_int16_2.byteOffset); assertEquals(2, derived_int16_2.BYTES_PER_ELEMENT); var derived_uint32 = new Uint32Array(ab); assertInstance(derived_uint32, Uint32Array); assertSame(ab, derived_uint32.buffer); assertEquals(3, derived_uint32.length); assertEquals(12, derived_uint32.byteLength); assertEquals(0, derived_uint32.byteOffset); assertEquals(4, derived_uint32.BYTES_PER_ELEMENT); var derived_uint32_2 = new Uint32Array(ab,4); assertInstance(derived_uint32_2, Uint32Array); assertSame(ab, derived_uint32_2.buffer); assertEquals(2, derived_uint32_2.length); assertEquals(8, derived_uint32_2.byteLength); assertEquals(4, derived_uint32_2.byteOffset); assertEquals(4, derived_uint32_2.BYTES_PER_ELEMENT); var derived_uint32_3 = new Uint32Array(ab,4,1); assertInstance(derived_uint32_3, Uint32Array); assertSame(ab, derived_uint32_3.buffer); assertEquals(1, derived_uint32_3.length); assertEquals(4, derived_uint32_3.byteLength); assertEquals(4, derived_uint32_3.byteOffset); assertEquals(4, derived_uint32_3.BYTES_PER_ELEMENT); var derived_float64 = new Float64Array(ab,0,1); assertInstance(derived_float64, Float64Array); assertSame(ab, derived_float64.buffer); assertEquals(1, derived_float64.length); assertEquals(8, derived_float64.byteLength); assertEquals(0, derived_float64.byteOffset); assertEquals(8, derived_float64.BYTES_PER_ELEMENT); // If a given byteOffset and length references an area beyond the end of the // ArrayBuffer an exception is raised. function abfunc3() { new Uint32Array(ab,4,3); } assertThrows(abfunc3); function abfunc4() { new Uint32Array(ab,16); } assertThrows(abfunc4); // The given byteOffset must be a multiple of the element size of the specific // type, otherwise an exception is raised. function abfunc5() { new Uint32Array(ab,5); } assertThrows(abfunc5); // If length is not explicitly specified, the length of the ArrayBuffer minus // the byteOffset must be a multiple of the element size of the specific type, // or an exception is raised. var ab2 = new ArrayBuffer(13); function abfunc6() { new Uint32Array(ab2,4); } assertThrows(abfunc6); // Test that an array constructed without an array buffer creates one properly. a = new Uint8Array(31); assertEquals(a.byteLength, a.buffer.byteLength); assertEquals(a.length, a.buffer.byteLength); assertEquals(a.length * a.BYTES_PER_ELEMENT, a.buffer.byteLength); a = new Int16Array(5); assertEquals(a.byteLength, a.buffer.byteLength); assertEquals(a.length * a.BYTES_PER_ELEMENT, a.buffer.byteLength); a = new Float64Array(7); assertEquals(a.byteLength, a.buffer.byteLength); assertEquals(a.length * a.BYTES_PER_ELEMENT, a.buffer.byteLength); // Test that an implicitly created buffer is a valid buffer. a = new Float64Array(7); assertSame(a.buffer, (new Uint16Array(a.buffer)).buffer); assertSame(a.buffer, (new Float32Array(a.buffer,4)).buffer); assertSame(a.buffer, (new Int8Array(a.buffer,3,51)).buffer); assertInstance(a.buffer, ArrayBuffer); // Test the correct behavior of the |BYTES_PER_ELEMENT| property a = new Int32Array(2); assertEquals(4, a.BYTES_PER_ELEMENT); a.BYTES_PER_ELEMENT = 42; a = new Uint8Array(2); assertEquals(1, a.BYTES_PER_ELEMENT); a = new Int16Array(2); assertEquals(2, a.BYTES_PER_ELEMENT); // Test Float64Arrays. function get(a, index) { return a[index]; } function set(a, index, value) { a[index] = value; } function temp() { var array = new Float64Array(2); for (var i = 0; i < 5; i++) { set(array, 0, 2.5); assertEquals(2.5, array[0]); } %OptimizeFunctionOnNextCall(set); set(array, 0, 2.5); assertEquals(2.5, array[0]); set(array, 1, 3.5); assertEquals(3.5, array[1]); for (var i = 0; i < 5; i++) { assertEquals(2.5, get(array, 0)); assertEquals(3.5, array[1]); } %OptimizeFunctionOnNextCall(get); assertEquals(2.5, get(array, 0)); assertEquals(3.5, get(array, 1)); } // Test non-number parameters. var array_with_length_from_non_number = new Int32Array("2"); assertEquals(2, array_with_length_from_non_number.length); // Test loads and stores. types = [Array, Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array, Uint8ClampedArray, Float32Array, Float64Array]; test_result_nan = [NaN, 0, 0, 0, 0, 0, 0, 0, NaN, NaN]; test_result_low_int = [-1, -1, 255, -1, 65535, -1, 0xFFFFFFFF, 0, -1, -1]; test_result_low_double = [-1.25, -1, 255, -1, 65535, -1, 0xFFFFFFFF, 0, -1.25, -1.25]; test_result_middle = [253.75, -3, 253, 253, 253, 253, 253, 254, 253.75, 253.75]; test_result_high_int = [256, 0, 0, 256, 256, 256, 256, 255, 256, 256]; test_result_high_double = [256.25, 0, 0, 256, 256, 256, 256, 255, 256.25, 256.25]; const kElementCount = 40; function test_load(array, sum) { for (var i = 0; i < kElementCount; i++) { sum += array[i]; } return sum; } function test_load_const_key(array, sum) { sum += array[0]; sum += array[1]; sum += array[2]; return sum; } function test_store(array, sum) { for (var i = 0; i < kElementCount; i++) { sum += array[i] = i+1; } return sum; } function test_store_const_key(array, sum) { sum += array[0] = 1; sum += array[1] = 2; sum += array[2] = 3; return sum; } function zero() { return 0.0; } function test_store_middle_tagged(array, sum) { array[0] = 253.75; return array[0]; } function test_store_high_tagged(array, sum) { array[0] = 256.25; return array[0]; } function test_store_middle_double(array, sum) { array[0] = 253.75 + zero(); // + forces double type feedback return array[0]; } function test_store_high_double(array, sum) { array[0] = 256.25 + zero(); // + forces double type feedback return array[0]; } function test_store_high_double(array, sum) { array[0] = 256.25; return array[0]; } function test_store_low_int(array, sum) { array[0] = -1; return array[0]; } function test_store_low_tagged(array, sum) { array[0] = -1.25; return array[0]; } function test_store_low_double(array, sum) { array[0] = -1.25 + zero(); // + forces double type feedback return array[0]; } function test_store_high_int(array, sum) { array[0] = 256; return array[0]; } function test_store_nan(array, sum) { array[0] = NaN; return array[0]; } const kRuns = 10; function run_test(test_func, array, expected_result) { for (var i = 0; i < 5; i++) test_func(array, 0); %OptimizeFunctionOnNextCall(test_func); var sum = 0; for (var i = 0; i < kRuns; i++) { sum = test_func(array, sum); } assertEquals(expected_result, sum); %DeoptimizeFunction(test_func); %ClearFunctionFeedback(test_func); } function run_bounds_test(test_func, array, expected_result) { assertEquals(undefined, a[kElementCount]); a[kElementCount] = 456; assertEquals(undefined, a[kElementCount]); assertEquals(undefined, a[kElementCount+1]); a[kElementCount+1] = 456; assertEquals(undefined, a[kElementCount+1]); } for (var t = 0; t < types.length; t++) { var type = types[t]; var a = new type(kElementCount); for (var i = 0; i < kElementCount; i++) { a[i] = i; } // Run test functions defined above. run_test(test_load, a, 780 * kRuns); run_test(test_load_const_key, a, 3 * kRuns); run_test(test_store, a, 820 * kRuns); run_test(test_store_const_key, a, 6 * kRuns); run_test(test_store_low_int, a, test_result_low_int[t]); run_test(test_store_low_double, a, test_result_low_double[t]); run_test(test_store_low_tagged, a, test_result_low_double[t]); run_test(test_store_high_int, a, test_result_high_int[t]); run_test(test_store_nan, a, test_result_nan[t]); run_test(test_store_middle_double, a, test_result_middle[t]); run_test(test_store_middle_tagged, a, test_result_middle[t]); run_test(test_store_high_double, a, test_result_high_double[t]); run_test(test_store_high_tagged, a, test_result_high_double[t]); // Test the correct behavior of the |length| property (which is read-only). if (t != 0) { assertEquals(kElementCount, a.length); a.length = 2; assertEquals(kElementCount, a.length); assertTrue(delete a.length); // Make sure bounds checks are handled correctly for external arrays. run_bounds_test(a); run_bounds_test(a); run_bounds_test(a); %OptimizeFunctionOnNextCall(run_bounds_test); run_bounds_test(a); %DeoptimizeFunction(run_bounds_test); %ClearFunctionFeedback(run_bounds_test); } function array_load_set_smi_check(a) { return a[0] = a[0] = 1; } array_load_set_smi_check(a); array_load_set_smi_check(0); function array_load_set_smi_check2(a) { return a[0] = a[0] = 1; } array_load_set_smi_check2(a); %OptimizeFunctionOnNextCall(array_load_set_smi_check2); array_load_set_smi_check2(a); array_load_set_smi_check2(0); %DeoptimizeFunction(array_load_set_smi_check2); %ClearFunctionFeedback(array_load_set_smi_check2); } // Check handling of undefined in 32- and 64-bit external float arrays. function store_float32_undefined(ext_array) { ext_array[0] = undefined; } var float32_array = new Float32Array(1); // Make sure runtime does it right store_float32_undefined(float32_array); assertTrue(isNaN(float32_array[0])); // Make sure the ICs do it right store_float32_undefined(float32_array); assertTrue(isNaN(float32_array[0])); // Make sure that Cranskshft does it right. %OptimizeFunctionOnNextCall(store_float32_undefined); store_float32_undefined(float32_array); assertTrue(isNaN(float32_array[0])); function store_float64_undefined(ext_array) { ext_array[0] = undefined; } var float64_array = new Float64Array(1); // Make sure runtime does it right store_float64_undefined(float64_array); assertTrue(isNaN(float64_array[0])); // Make sure the ICs do it right store_float64_undefined(float64_array); assertTrue(isNaN(float64_array[0])); // Make sure that Cranskshft does it right. %OptimizeFunctionOnNextCall(store_float64_undefined); store_float64_undefined(float64_array); assertTrue(isNaN(float64_array[0])); // Check handling of 0-sized buffers and arrays. ab = new ArrayBuffer(0); assertInstance(ab, ArrayBuffer); assertEquals(0, ab.byteLength); a = new Int8Array(ab); assertInstance(a, Int8Array); assertEquals(0, a.byteLength); assertEquals(0, a.length); a[0] = 1; assertEquals(undefined, a[0]); ab = new ArrayBuffer(16); assertInstance(ab, ArrayBuffer); a = new Float32Array(ab,4,0); assertInstance(a, Float32Array); assertEquals(0, a.byteLength); assertEquals(0, a.length); a[0] = 1; assertEquals(undefined, a[0]); a = new Uint16Array(0); assertInstance(a, Uint16Array); assertEquals(0, a.byteLength); assertEquals(0, a.length); a[0] = 1; assertEquals(undefined, a[0]); // Check construction from arrays. a = new Uint32Array([]); assertInstance(a, Uint32Array); assertEquals(0, a.length); assertEquals(0, a.byteLength); assertEquals(0, a.buffer.byteLength); assertEquals(4, a.BYTES_PER_ELEMENT); assertInstance(a.buffer, ArrayBuffer); a = new Uint16Array([1,2,3]); assertInstance(a, Uint16Array); assertEquals(3, a.length); assertEquals(6, a.byteLength); assertEquals(6, a.buffer.byteLength); assertEquals(2, a.BYTES_PER_ELEMENT); assertEquals(1, a[0]); assertEquals(3, a[2]); assertInstance(a.buffer, ArrayBuffer); a = new Uint32Array(a); assertInstance(a, Uint32Array); assertEquals(3, a.length); assertEquals(12, a.byteLength); assertEquals(12, a.buffer.byteLength); assertEquals(4, a.BYTES_PER_ELEMENT); assertEquals(1, a[0]); assertEquals(3, a[2]); assertInstance(a.buffer, ArrayBuffer); // Check subarrays. a = new Uint16Array([1,2,3,4,5,6]); aa = a.subarray(3); assertInstance(aa, Uint16Array); assertEquals(3, aa.length); assertEquals(6, aa.byteLength); assertEquals(2, aa.BYTES_PER_ELEMENT); assertSame(a.buffer, aa.buffer); aa = a.subarray(3,5); assertInstance(aa, Uint16Array); assertEquals(2, aa.length); assertEquals(4, aa.byteLength); assertEquals(2, aa.BYTES_PER_ELEMENT); assertSame(a.buffer, aa.buffer); aa = a.subarray(4,8); assertInstance(aa, Uint16Array); assertEquals(2, aa.length); assertEquals(4, aa.byteLength); assertEquals(2, aa.BYTES_PER_ELEMENT); assertSame(a.buffer, aa.buffer); aa = a.subarray(9); assertInstance(aa, Uint16Array); assertEquals(0, aa.length); assertEquals(0, aa.byteLength); assertEquals(2, aa.BYTES_PER_ELEMENT); assertSame(a.buffer, aa.buffer); aa = a.subarray(-4); assertInstance(aa, Uint16Array); assertEquals(4, aa.length); assertEquals(8, aa.byteLength); assertEquals(2, aa.BYTES_PER_ELEMENT); assertSame(a.buffer, aa.buffer); aa = a.subarray(-3,-1); assertInstance(aa, Uint16Array); assertEquals(2, aa.length); assertEquals(4, aa.byteLength); assertEquals(2, aa.BYTES_PER_ELEMENT); assertSame(a.buffer, aa.buffer); aa = a.subarray(3,2); assertInstance(aa, Uint16Array); assertEquals(0, aa.length); assertEquals(0, aa.byteLength); assertEquals(2, aa.BYTES_PER_ELEMENT); assertSame(a.buffer, aa.buffer); aa = a.subarray(-3,-4); assertInstance(aa, Uint16Array); assertEquals(0, aa.length); assertEquals(0, aa.byteLength); assertEquals(2, aa.BYTES_PER_ELEMENT); assertSame(a.buffer, aa.buffer); aa = a.subarray(0,-8); assertInstance(aa, Uint16Array); assertEquals(0, aa.length); assertEquals(0, aa.byteLength); assertEquals(2, aa.BYTES_PER_ELEMENT); assertSame(a.buffer, aa.buffer); assertThrows(function(){ a.subarray.call({}, 0) }); assertThrows(function(){ a.subarray.call([], 0) }); // Try to call constructors directly as functions, and through .call // and .apply. Should fail. assertThrows(function() { ArrayBuffer(100); }, TypeError); assertThrows(function() { Int8Array(b, 5, 77); }, TypeError); assertThrows(function() { ArrayBuffer.call(null, 10); }, TypeError); assertThrows(function() { Uint16Array.call(null, b, 2, 4); }, TypeError); assertThrows(function() { ArrayBuffer.apply(null, [1000]); }, TypeError); assertThrows(function() { Float32Array.apply(null, [b, 128, 1]); }, TypeError); // Test array.set in different combinations. var b = new ArrayBuffer(4) function assertArrayPrefix(expected, array) { for (var i = 0; i < expected.length; ++i) { assertEquals(expected[i], array[i]); } } var a11 = new Int16Array([1, 2, 3, 4, 0, -1]) var a12 = new Uint16Array(15) a12.set(a11, 3) assertArrayPrefix([0, 0, 0, 1, 2, 3, 4, 0, 0xffff, 0, 0], a12) assertThrows(function(){ a11.set(a12) }) var a21 = [1, undefined, 10, NaN, 0, -1, {valueOf: function() {return 3}}] var a22 = new Int32Array(12) a22.set(a21, 2) assertArrayPrefix([0, 0, 1, 0, 10, 0, 0, -1, 3, 0], a22) var a31 = new Float32Array([2, 4, 6, 8, 11, NaN, 1/0, -3]) var a32 = a31.subarray(2, 6) a31.set(a32, 4) assertArrayPrefix([2, 4, 6, 8, 6, 8, 11, NaN], a31) assertArrayPrefix([6, 8, 6, 8], a32) var a4 = new Uint8ClampedArray([3,2,5,6]) a4.set(a4) assertArrayPrefix([3, 2, 5, 6], a4) // Cases with overlapping backing store but different element sizes. var b = new ArrayBuffer(4) var a5 = new Int16Array(b) var a50 = new Int8Array(b) var a51 = new Int8Array(b, 0, 2) var a52 = new Int8Array(b, 1, 2) var a53 = new Int8Array(b, 2, 2) a5.set([0x5050, 0x0a0a]) assertArrayPrefix([0x50, 0x50, 0x0a, 0x0a], a50) assertArrayPrefix([0x50, 0x50], a51) assertArrayPrefix([0x50, 0x0a], a52) assertArrayPrefix([0x0a, 0x0a], a53) a50.set([0x50, 0x50, 0x0a, 0x0a]) a51.set(a5) assertArrayPrefix([0x50, 0x0a, 0x0a, 0x0a], a50) a50.set([0x50, 0x50, 0x0a, 0x0a]) a52.set(a5) assertArrayPrefix([0x50, 0x50, 0x0a, 0x0a], a50) a50.set([0x50, 0x50, 0x0a, 0x0a]) a53.set(a5) assertArrayPrefix([0x50, 0x50, 0x50, 0x0a], a50) a50.set([0x50, 0x51, 0x0a, 0x0b]) a5.set(a51) assertArrayPrefix([0x0050, 0x0051], a5) a50.set([0x50, 0x51, 0x0a, 0x0b]) a5.set(a52) assertArrayPrefix([0x0051, 0x000a], a5) a50.set([0x50, 0x51, 0x0a, 0x0b]) a5.set(a53) assertArrayPrefix([0x000a, 0x000b], a5) // Mixed types of same size. var a61 = new Float32Array([1.2, 12.3]) var a62 = new Int32Array(2) a62.set(a61) assertArrayPrefix([1, 12], a62) a61.set(a62) assertArrayPrefix([1, 12], a61) // Invalid source assertThrows(function() { a.set(0); }, TypeError); assertArrayPrefix([1,2,3,4,5,6], a); a.set({}); // does not throw assertArrayPrefix([1,2,3,4,5,6], a); // Test arraybuffer.slice var a0 = new Int8Array([1, 2, 3, 4, 5, 6]) var b0 = a0.buffer var b1 = b0.slice(0) assertEquals(b0.byteLength, b1.byteLength) assertArrayPrefix([1, 2, 3, 4, 5, 6], new Int8Array(b1)) var b2 = b0.slice(3) assertEquals(b0.byteLength - 3, b2.byteLength) assertArrayPrefix([4, 5, 6], new Int8Array(b2)) var b3 = b0.slice(2, 4) assertEquals(2, b3.byteLength) assertArrayPrefix([3, 4], new Int8Array(b3)) function goo(a, i) { return a[i]; } function boo(a, i, v) { return a[i] = v; } function do_tagged_index_external_array_test(constructor) { var t_array = new constructor([1, 2, 3, 4, 5, 6]); assertEquals(1, goo(t_array, 0)); assertEquals(1, goo(t_array, 0)); boo(t_array, 0, 13); assertEquals(13, goo(t_array, 0)); %OptimizeFunctionOnNextCall(goo); %OptimizeFunctionOnNextCall(boo); boo(t_array, 0, 15); assertEquals(15, goo(t_array, 0)); %ClearFunctionFeedback(goo); %ClearFunctionFeedback(boo); } do_tagged_index_external_array_test(Int8Array); do_tagged_index_external_array_test(Uint8Array); do_tagged_index_external_array_test(Int16Array); do_tagged_index_external_array_test(Uint16Array); do_tagged_index_external_array_test(Int32Array); do_tagged_index_external_array_test(Uint32Array); do_tagged_index_external_array_test(Float32Array); do_tagged_index_external_array_test(Float64Array); var built_in_array = new Array(1, 2, 3, 4, 5, 6); assertEquals(1, goo(built_in_array, 0)); assertEquals(1, goo(built_in_array, 0)); %OptimizeFunctionOnNextCall(goo); %OptimizeFunctionOnNextCall(boo); boo(built_in_array, 0, 11); assertEquals(11, goo(built_in_array, 0)); %ClearFunctionFeedback(goo); %ClearFunctionFeedback(boo); built_in_array = new Array(1.5, 2, 3, 4, 5, 6); assertEquals(1.5, goo(built_in_array, 0)); assertEquals(1.5, goo(built_in_array, 0)); %OptimizeFunctionOnNextCall(goo); %OptimizeFunctionOnNextCall(boo); boo(built_in_array, 0, 2.5); assertEquals(2.5, goo(built_in_array, 0)); %ClearFunctionFeedback(goo); %ClearFunctionFeedback(boo); // Check all int range edge cases function checkRange() { var e32 = Math.pow(2,32); var e31 = Math.pow(2,31); var e16 = Math.pow(2,16); var e15 = Math.pow(2,15); var e8 = Math.pow(2,8); var e7 = Math.pow(2,7); var a7 = new Uint32Array(2); var a71 = new Int32Array(2); var a72 = new Uint16Array(2); var a73 = new Int16Array(2); var a74 = new Uint8Array(2); var a75 = new Int8Array(2); for (i = 1; i <= Math.pow(2,33); i *= 2) { var j = i-1; a7[0] = i; a71[0] = i; a72[0] = i; a73[0] = i; a74[0] = i; a75[0] = i; a7[1] = j; a71[1] = j; a72[1] = j; a73[1] = j; a74[1] = j; a75[1] = j; if (i < e32) { assertEquals(a7[0], i); } else { assertEquals(a7[0], 0); } if (j < e32) { assertEquals(a7[1], j); } else { assertEquals(a7[1],e32-1); } if (i < e31) { assertEquals(a71[0], i); } else { assertEquals(a71[0], (i < e32) ? -e31 : 0 ); } if (j < e31) { assertEquals(a71[1], j); } else { assertEquals(a71[1], -1); } if (i < e16) { assertEquals(a72[0], i); } else { assertEquals(a72[0], 0); } if (j < e16) { assertEquals(a72[1], j); } else { assertEquals(a72[1], e16-1); } if (i < e15) { assertEquals(a73[0], i); } else { assertEquals(a73[0], (i < e16) ? -e15 : 0 ); } if (j < e15) { assertEquals(a73[1], j); } else { assertEquals(a73[1], -1); } if (i < e8) { assertEquals(a74[0], i); } else { assertEquals(a74[0], 0); } if (j < e8) { assertEquals(a74[1], j); } else { assertEquals(a74[1], e8-1); } if (i < e7) { assertEquals(a75[0], i); } else { assertEquals(a75[0], (i < e8) ? -e7 : 0); } if (j < e7) { assertEquals(a75[1], j); } else { assertEquals(a75[1], -1); } } } checkRange();