test/mjsunit/constant-folding-2.js - v8/v8.git - Git at Google

 // Copyright 2013 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 --nostress-opt --opt

 function test(f, iterations) {
   f();
   f();
   // Some of the tests need to learn until they stabilize.
   let n = iterations ? iterations : 1;
   for (let i = 0; i < n; i++) {
     %OptimizeFunctionOnNextCall(f);
     f();
   }
   // Assert that the function finally stabilized.
   assertOptimized(f);
 }

 test(function add() {
   assertEquals(2, 1 + 1);
   assertEquals(2.5, 1.25 + 1.25);
   assertSame(Infinity, Infinity + Infinity);
   assertSame(Infinity, Infinity + 3);
   assertSame(NaN, Infinity + (-Infinity));
   assertSame(NaN, NaN + 2);
   assertSame(-Infinity, 1 / (-0.0 + (-0.0)));
   assertSame(Infinity, 1 / (-0.0 + 0.0));
 });

 test(function inc() {
   var a = 1;
   var b = Infinity;
   var c = -Infinity;
   var d = NaN;
   assertEquals(2, ++a);
   assertSame(Infinity, ++b);
   assertSame(-Infinity, ++c);
   assertSame(NaN, ++d);
 });

 test(function dec() {
   var a = 1;
   var b = Infinity;
   var c = -Infinity;
   var d = NaN;
   assertEquals(0, --a);
   assertSame(Infinity, --b);
   assertSame(-Infinity, --c);
   assertSame(NaN, --d);
 });

 test(function sub() {
   assertEquals(0, 1 - 1);
   assertEquals(0.5, 1.5 - 1);
   assertSame(Infinity, Infinity - (-Infinity));
   assertSame(Infinity, Infinity - 3);
   assertSame(NaN, Infinity - Infinity);
   assertSame(NaN, NaN - 2);
   assertSame(-Infinity, 1 / (-0.0 - 0.0));
   assertSame(Infinity, 1 / (0.0 - 0.0));
 });

 test(function mul() {
   assertEquals(1, 1 * 1);
   assertEquals(2.25, 1.5 * 1.5);
   assertSame(Infinity, Infinity * Infinity);
   assertSame(-Infinity, Infinity * (-Infinity));
   assertSame(Infinity, Infinity * 3);
   assertSame(-Infinity, Infinity * (-3));
   assertSame(NaN, NaN * 3);
   assertSame(-Infinity, 1 / (-0.0 * 0.0));
   assertSame(Infinity, 1 / (0.0 * 0.0));
 });

 test(function div() {
   assertEquals(1, 1 / 1);
   assertEquals(1.5, 2.25 / 1.5);
   assertSame(NaN, Infinity / Infinity);
   assertSame(Infinity, Infinity / 3);
   assertSame(-Infinity, Infinity / (-3));
   assertSame(NaN, NaN / 3);
   assertSame(-Infinity, 1 / (-0.0));
   assertSame(Infinity, Infinity/0.0);
 });

 test(function mathMin() {
   assertEquals(1, Math.min(1, 10));
   assertEquals(1.5, Math.min(1.5, 2.5));
   assertEquals(0, Math.min(Infinity, 0));
   assertSame(Infinity, Math.min(Infinity, Infinity));
   assertSame(-Infinity, Math.min(Infinity, -Infinity));
   assertSame(NaN, Math.min(NaN, 1));
   assertSame(Infinity, 1 / Math.min(0.0, 0.0));
   assertSame(-Infinity, 1 / Math.min(-0.0, -0.0));
   assertSame(-Infinity, 1 / Math.min(0.0, -0.0));
 });

 test(function mathMax() {
   assertEquals(10, Math.max(1, 10));
   assertEquals(2.5, Math.max(1.5, 2.5));
   assertEquals(Infinity, Math.max(Infinity, 0));
   assertSame(-Infinity, Math.max(-Infinity, -Infinity));
   assertSame(Infinity, Math.max(Infinity, -Infinity));
   assertSame(NaN, Math.max(NaN, 1));
   assertSame(Infinity, 1 / Math.max(0.0, 0.0));
   assertSame(-Infinity, 1 / Math.max(-0.0, -0.0));
   assertSame(Infinity, 1 / Math.max(0.0, -0.0));
 });

 test(function mathExp() {
   assertEquals(1.0, Math.exp(0.0));
   assertTrue(2.7 < Math.exp(1) && Math.exp(1) < 2.8);
   assertSame(Infinity, Math.exp(Infinity));
   assertEquals("0", String(Math.exp(-Infinity)));
   assertSame(NaN, Math.exp(NaN));
 });

 test(function mathLog() {
   assertEquals(0.0, Math.log(1.0));
   assertTrue(1 < Math.log(3) && Math.log(3) < 1.5);
   assertSame(Infinity, Math.log(Infinity));
   assertSame(NaN, Math.log(-Infinity));
   assertSame(NaN, Math.exp(NaN));
 });

 test(function mathSqrt() {
   assertEquals(1.0, Math.sqrt(1.0));
   assertSame(NaN, Math.sqrt(-1.0));
   assertSame(Infinity, Math.sqrt(Infinity));
   assertSame(NaN, Math.sqrt(-Infinity));
   assertSame(NaN, Math.sqrt(NaN));
 });

 test(function mathPowHalf() {
   assertEquals(1.0, Math.pow(1.0, 0.5));
   assertSame(NaN, Math.sqrt(-1.0));
   assertSame(Infinity, Math.pow(Infinity, 0.5));
   assertSame(NaN, Math.sqrt(-Infinity, 0.5));
   assertEquals(0, Math.pow(Infinity, -0.5));
   assertSame(NaN, Math.sqrt(-Infinity, -0.5));
   assertSame(NaN, Math.sqrt(NaN, 0.5));
 });

 test(function mathAbs() {
   assertEquals(1.5, Math.abs(1.5));
   assertEquals(1.5, Math.abs(-1.5));
   assertSame(Infinity, Math.abs(Infinity));
   assertSame(Infinity, Math.abs(-Infinity));
   assertSame(NaN, Math.abs(NaN));
 });

 test(function mathRound() {
   assertEquals(2, Math.round(1.5));
   assertEquals(-1, Math.round(-1.5));
   assertSame(Infinity, Math.round(Infinity));
   assertSame(-Infinity, Math.round(-Infinity));
   assertSame(Infinity, 1 / Math.round(0.0));
   assertSame(-Infinity, 1 / Math.round(-0.0));
   assertSame(NaN, Math.round(NaN));
   assertEquals(Math.pow(2, 52) + 1, Math.round(Math.pow(2, 52) + 1));
 });

 test(function mathFround() {
   assertTrue(isNaN(Math.fround(NaN)));
   assertSame(Infinity, 1/Math.fround(0));
   assertSame(-Infinity, 1/Math.fround(-0));
   assertSame(Infinity, Math.fround(Infinity));
   assertSame(-Infinity, Math.fround(-Infinity));
   assertSame(Infinity, Math.fround(1E200));
   assertSame(-Infinity, Math.fround(-1E200));
   assertEquals(3.1415927410125732, Math.fround(Math.PI));
 });

 test(function mathFloor() {
   assertEquals(1, Math.floor(1.5));
   assertEquals(-2, Math.floor(-1.5));
   assertSame(Infinity, Math.floor(Infinity));
   assertSame(-Infinity, Math.floor(-Infinity));
   assertSame(Infinity, 1 / Math.floor(0.0));
   assertSame(-Infinity, 1 / Math.floor(-0.0));
   assertSame(NaN, Math.floor(NaN));
   assertEquals(Math.pow(2, 52) + 1, Math.floor(Math.pow(2, 52) + 1));
 });

 test(function mathPow() {
   assertEquals(2.25, Math.pow(1.5, 2));
   assertTrue(1.8 < Math.pow(1.5, 1.5) && Math.pow(1.5, 1.5) < 1.9);
   assertSame(Infinity, Math.pow(Infinity, 0.5));
   assertSame(Infinity, Math.pow(-Infinity, 0.5));
   assertEquals(0, Math.pow(Infinity, -0.5));
   assertEquals(0, Math.pow(Infinity, -0.5));
   assertSame(Infinity, Math.pow(Infinity, Infinity));
   assertEquals(0, Math.pow(Infinity, -Infinity));
   assertSame(NaN, Math.pow(Infinity, NaN));
   assertSame(NaN, Math.pow(NaN, 2));
 });

 test(function stringAdd() {
   assertEquals("", "" + "");
   assertEquals("folded constant", "folded " + "constant");
   assertEquals("not folded constant1", "not folded constant" + 1);
 });

 test(function stringLength() {
   assertEquals(6, "abcdef".length);
   assertEquals(0, "".length);
   assertEquals(-5, { length: -5 }.length);
 });

 test(function stringCharAt() {
   assertEquals("c", "abc".charAt(2));
   assertEquals("", "abc".charAt(-1));
   assertEquals("", "abc".charAt(4));
   assertEquals("b", "abc".charAt(1.1));
   assertEquals("", "abc".charAt(4.1));
   assertEquals("", "abc".charAt(Infinity));
   assertEquals("", "abc".charAt(-Infinity));
   assertEquals("a", "abc".charAt(-0));
   assertEquals("a", "abc".charAt(+0));
   assertEquals("", "".charAt());
   assertEquals("", "abc".charAt(1 + 4294967295));
 }, 10);

 test(function stringCharCodeAt() {
   assertSame(99, "abc".charCodeAt(2));
   assertSame(NaN, "abc".charCodeAt(-1));
   assertSame(NaN, "abc".charCodeAt(4));
   assertSame(98, "abc".charCodeAt(1.1));
   assertSame(NaN, "abc".charCodeAt(4.1));
   assertSame(NaN, "abc".charCodeAt(Infinity));
   assertSame(NaN, "abc".charCodeAt(-Infinity));
   assertSame(97, "abc".charCodeAt(-0));
   assertSame(97, "abc".charCodeAt(+0));
   assertSame(NaN, "".charCodeAt());
   assertSame(NaN, "abc".charCodeAt(1 + 4294967295));
 }, 10);

 test(function stringCodePointAt() {
   assertSame(65533, "äϠ�𝌆".codePointAt(2));
   assertSame(119558, "äϠ�𝌆".codePointAt(3));
   assertSame(undefined, "äϠ�".codePointAt(-1));
   assertSame(undefined, "äϠ�".codePointAt(4));
   assertSame(992, "äϠ�".codePointAt(1.1));
   assertSame(undefined, "äϠ�".codePointAt(4.1));
   assertSame(undefined, "äϠ�".codePointAt(Infinity));
   assertSame(undefined, "äϠ�".codePointAt(-Infinity));
   assertSame(228, "äϠ�".codePointAt(-0));
   assertSame(97, "aϠ�".codePointAt(+0));
   assertSame(undefined, "".codePointAt());
   assertSame(undefined, "äϠ�".codePointAt(1 + 4294967295));
 }, 10);

 test(function int32Mod() {
   assertEquals(-0, -2147483648 % (-1));
 });

 test(function int32Div() {
   assertEquals(2147483648, -2147483648 / (-1));
 });
	// Copyright 2013 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 --nostress-opt --opt

	function test(f, iterations) {
	f();
	f();
	// Some of the tests need to learn until they stabilize.
	let n = iterations ? iterations : 1;
	for (let i = 0; i < n; i++) {
	%OptimizeFunctionOnNextCall(f);
	f();
	}
	// Assert that the function finally stabilized.
	assertOptimized(f);
	}

	test(function add() {
	assertEquals(2, 1 + 1);
	assertEquals(2.5, 1.25 + 1.25);
	assertSame(Infinity, Infinity + Infinity);
	assertSame(Infinity, Infinity + 3);
	assertSame(NaN, Infinity + (-Infinity));
	assertSame(NaN, NaN + 2);
	assertSame(-Infinity, 1 / (-0.0 + (-0.0)));
	assertSame(Infinity, 1 / (-0.0 + 0.0));
	});

	test(function inc() {
	var a = 1;
	var b = Infinity;
	var c = -Infinity;
	var d = NaN;
	assertEquals(2, ++a);
	assertSame(Infinity, ++b);
	assertSame(-Infinity, ++c);
	assertSame(NaN, ++d);
	});

	test(function dec() {
	var a = 1;
	var b = Infinity;
	var c = -Infinity;
	var d = NaN;
	assertEquals(0, --a);
	assertSame(Infinity, --b);
	assertSame(-Infinity, --c);
	assertSame(NaN, --d);
	});

	test(function sub() {
	assertEquals(0, 1 - 1);
	assertEquals(0.5, 1.5 - 1);
	assertSame(Infinity, Infinity - (-Infinity));
	assertSame(Infinity, Infinity - 3);
	assertSame(NaN, Infinity - Infinity);
	assertSame(NaN, NaN - 2);
	assertSame(-Infinity, 1 / (-0.0 - 0.0));
	assertSame(Infinity, 1 / (0.0 - 0.0));
	});

	test(function mul() {
	assertEquals(1, 1 * 1);
	assertEquals(2.25, 1.5 * 1.5);
	assertSame(Infinity, Infinity * Infinity);
	assertSame(-Infinity, Infinity * (-Infinity));
	assertSame(Infinity, Infinity * 3);
	assertSame(-Infinity, Infinity * (-3));
	assertSame(NaN, NaN * 3);
	assertSame(-Infinity, 1 / (-0.0 * 0.0));
	assertSame(Infinity, 1 / (0.0 * 0.0));
	});

	test(function div() {
	assertEquals(1, 1 / 1);
	assertEquals(1.5, 2.25 / 1.5);
	assertSame(NaN, Infinity / Infinity);
	assertSame(Infinity, Infinity / 3);
	assertSame(-Infinity, Infinity / (-3));
	assertSame(NaN, NaN / 3);
	assertSame(-Infinity, 1 / (-0.0));
	assertSame(Infinity, Infinity/0.0);
	});

	test(function mathMin() {
	assertEquals(1, Math.min(1, 10));
	assertEquals(1.5, Math.min(1.5, 2.5));
	assertEquals(0, Math.min(Infinity, 0));
	assertSame(Infinity, Math.min(Infinity, Infinity));
	assertSame(-Infinity, Math.min(Infinity, -Infinity));
	assertSame(NaN, Math.min(NaN, 1));
	assertSame(Infinity, 1 / Math.min(0.0, 0.0));
	assertSame(-Infinity, 1 / Math.min(-0.0, -0.0));
	assertSame(-Infinity, 1 / Math.min(0.0, -0.0));
	});

	test(function mathMax() {
	assertEquals(10, Math.max(1, 10));
	assertEquals(2.5, Math.max(1.5, 2.5));
	assertEquals(Infinity, Math.max(Infinity, 0));
	assertSame(-Infinity, Math.max(-Infinity, -Infinity));
	assertSame(Infinity, Math.max(Infinity, -Infinity));
	assertSame(NaN, Math.max(NaN, 1));
	assertSame(Infinity, 1 / Math.max(0.0, 0.0));
	assertSame(-Infinity, 1 / Math.max(-0.0, -0.0));
	assertSame(Infinity, 1 / Math.max(0.0, -0.0));
	});

	test(function mathExp() {
	assertEquals(1.0, Math.exp(0.0));
	assertTrue(2.7 < Math.exp(1) && Math.exp(1) < 2.8);
	assertSame(Infinity, Math.exp(Infinity));
	assertEquals("0", String(Math.exp(-Infinity)));
	assertSame(NaN, Math.exp(NaN));
	});

	test(function mathLog() {
	assertEquals(0.0, Math.log(1.0));
	assertTrue(1 < Math.log(3) && Math.log(3) < 1.5);
	assertSame(Infinity, Math.log(Infinity));
	assertSame(NaN, Math.log(-Infinity));
	assertSame(NaN, Math.exp(NaN));
	});

	test(function mathSqrt() {
	assertEquals(1.0, Math.sqrt(1.0));
	assertSame(NaN, Math.sqrt(-1.0));
	assertSame(Infinity, Math.sqrt(Infinity));
	assertSame(NaN, Math.sqrt(-Infinity));
	assertSame(NaN, Math.sqrt(NaN));
	});

	test(function mathPowHalf() {
	assertEquals(1.0, Math.pow(1.0, 0.5));
	assertSame(NaN, Math.sqrt(-1.0));
	assertSame(Infinity, Math.pow(Infinity, 0.5));
	assertSame(NaN, Math.sqrt(-Infinity, 0.5));
	assertEquals(0, Math.pow(Infinity, -0.5));
	assertSame(NaN, Math.sqrt(-Infinity, -0.5));
	assertSame(NaN, Math.sqrt(NaN, 0.5));
	});

	test(function mathAbs() {
	assertEquals(1.5, Math.abs(1.5));
	assertEquals(1.5, Math.abs(-1.5));
	assertSame(Infinity, Math.abs(Infinity));
	assertSame(Infinity, Math.abs(-Infinity));
	assertSame(NaN, Math.abs(NaN));
	});

	test(function mathRound() {
	assertEquals(2, Math.round(1.5));
	assertEquals(-1, Math.round(-1.5));
	assertSame(Infinity, Math.round(Infinity));
	assertSame(-Infinity, Math.round(-Infinity));
	assertSame(Infinity, 1 / Math.round(0.0));
	assertSame(-Infinity, 1 / Math.round(-0.0));
	assertSame(NaN, Math.round(NaN));
	assertEquals(Math.pow(2, 52) + 1, Math.round(Math.pow(2, 52) + 1));
	});

	test(function mathFround() {
	assertTrue(isNaN(Math.fround(NaN)));
	assertSame(Infinity, 1/Math.fround(0));
	assertSame(-Infinity, 1/Math.fround(-0));
	assertSame(Infinity, Math.fround(Infinity));
	assertSame(-Infinity, Math.fround(-Infinity));
	assertSame(Infinity, Math.fround(1E200));
	assertSame(-Infinity, Math.fround(-1E200));
	assertEquals(3.1415927410125732, Math.fround(Math.PI));
	});

	test(function mathFloor() {
	assertEquals(1, Math.floor(1.5));
	assertEquals(-2, Math.floor(-1.5));
	assertSame(Infinity, Math.floor(Infinity));
	assertSame(-Infinity, Math.floor(-Infinity));
	assertSame(Infinity, 1 / Math.floor(0.0));
	assertSame(-Infinity, 1 / Math.floor(-0.0));
	assertSame(NaN, Math.floor(NaN));
	assertEquals(Math.pow(2, 52) + 1, Math.floor(Math.pow(2, 52) + 1));
	});

	test(function mathPow() {
	assertEquals(2.25, Math.pow(1.5, 2));
	assertTrue(1.8 < Math.pow(1.5, 1.5) && Math.pow(1.5, 1.5) < 1.9);
	assertSame(Infinity, Math.pow(Infinity, 0.5));
	assertSame(Infinity, Math.pow(-Infinity, 0.5));
	assertEquals(0, Math.pow(Infinity, -0.5));
	assertEquals(0, Math.pow(Infinity, -0.5));
	assertSame(Infinity, Math.pow(Infinity, Infinity));
	assertEquals(0, Math.pow(Infinity, -Infinity));
	assertSame(NaN, Math.pow(Infinity, NaN));
	assertSame(NaN, Math.pow(NaN, 2));
	});

	test(function stringAdd() {
	assertEquals("", "" + "");
	assertEquals("folded constant", "folded " + "constant");
	assertEquals("not folded constant1", "not folded constant" + 1);
	});

	test(function stringLength() {
	assertEquals(6, "abcdef".length);
	assertEquals(0, "".length);
	assertEquals(-5, { length: -5 }.length);
	});

	test(function stringCharAt() {
	assertEquals("c", "abc".charAt(2));
	assertEquals("", "abc".charAt(-1));
	assertEquals("", "abc".charAt(4));
	assertEquals("b", "abc".charAt(1.1));
	assertEquals("", "abc".charAt(4.1));
	assertEquals("", "abc".charAt(Infinity));
	assertEquals("", "abc".charAt(-Infinity));
	assertEquals("a", "abc".charAt(-0));
	assertEquals("a", "abc".charAt(+0));
	assertEquals("", "".charAt());
	assertEquals("", "abc".charAt(1 + 4294967295));
	}, 10);

	test(function stringCharCodeAt() {
	assertSame(99, "abc".charCodeAt(2));
	assertSame(NaN, "abc".charCodeAt(-1));
	assertSame(NaN, "abc".charCodeAt(4));
	assertSame(98, "abc".charCodeAt(1.1));
	assertSame(NaN, "abc".charCodeAt(4.1));
	assertSame(NaN, "abc".charCodeAt(Infinity));
	assertSame(NaN, "abc".charCodeAt(-Infinity));
	assertSame(97, "abc".charCodeAt(-0));
	assertSame(97, "abc".charCodeAt(+0));
	assertSame(NaN, "".charCodeAt());
	assertSame(NaN, "abc".charCodeAt(1 + 4294967295));
	}, 10);

	test(function stringCodePointAt() {
	assertSame(65533, "äϠ�𝌆".codePointAt(2));
	assertSame(119558, "äϠ�𝌆".codePointAt(3));
	assertSame(undefined, "äϠ�".codePointAt(-1));
	assertSame(undefined, "äϠ�".codePointAt(4));
	assertSame(992, "äϠ�".codePointAt(1.1));
	assertSame(undefined, "äϠ�".codePointAt(4.1));
	assertSame(undefined, "äϠ�".codePointAt(Infinity));
	assertSame(undefined, "äϠ�".codePointAt(-Infinity));
	assertSame(228, "äϠ�".codePointAt(-0));
	assertSame(97, "aϠ�".codePointAt(+0));
	assertSame(undefined, "".codePointAt());
	assertSame(undefined, "äϠ�".codePointAt(1 + 4294967295));
	}, 10);

	test(function int32Mod() {
	assertEquals(-0, -2147483648 % (-1));
	});

	test(function int32Div() {
	assertEquals(2147483648, -2147483648 / (-1));
	});