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Harmony: implement Math.trunc.

Browse Source 
BUG=v8:2938
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/28793002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17286 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
yangguo@chromium.org 2013-10-21 11:15:11 +00:00
parent e14c323819
commit 2d6dab1f2e
3 changed files with 84 additions and 39 deletions
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15
src/harmony-math.js
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@ -29,7 +29,7 @@
// ES6 draft 09-27-13, section 20.2.2.28.
function MathSign(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
x = TO_NUMBER_INLINE(x);
if (x > 0) return 1;
if (x < 0) return -1;
if (x === 0) return x;
@ -37,12 +37,23 @@ function MathSign(x) {
}
// ES6 draft 09-27-13, section 20.2.2.34.
function MathTrunc(x) {
x = TO_NUMBER_INLINE(x);
if (x > 0) return MathFloor(x);
if (x < 0) return MathCeil(x);
if (x === 0) return x;
return NAN;
}
function ExtendMath() {
%CheckIsBootstrapping();
// Set up the non-enumerable functions on the Math object.
InstallFunctions($Math, DONT_ENUM, $Array(
"sign", MathSign
"sign", MathSign,
"trunc", MathTrunc
));
}

57
src/math.js
View File

@ -45,59 +45,51 @@ var $Math = new MathConstructor();
// ECMA 262 - 15.8.2.1
function MathAbs(x) {
if (%_IsSmi(x)) return x >= 0 ? x : -x;
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
x = TO_NUMBER_INLINE(x);
if (x === 0) return 0; // To handle -0.
return x > 0 ? x : -x;
}
// ECMA 262 - 15.8.2.2
function MathAcos(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
return %Math_acos(x);
return %Math_acos(TO_NUMBER_INLINE(x));
}
// ECMA 262 - 15.8.2.3
function MathAsin(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
return %Math_asin(x);
return %Math_asin(TO_NUMBER_INLINE(x));
}
// ECMA 262 - 15.8.2.4
function MathAtan(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
return %Math_atan(x);
return %Math_atan(TO_NUMBER_INLINE(x));
}
// ECMA 262 - 15.8.2.5
// The naming of y and x matches the spec, as does the order in which
// ToNumber (valueOf) is called.
function MathAtan2(y, x) {
if (!IS_NUMBER(y)) y = NonNumberToNumber(y);
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
return %Math_atan2(y, x);
return %Math_atan2(TO_NUMBER_INLINE(y), TO_NUMBER_INLINE(x));
}
// ECMA 262 - 15.8.2.6
function MathCeil(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
return %Math_ceil(x);
return %Math_ceil(TO_NUMBER_INLINE(x));
}
// ECMA 262 - 15.8.2.7
function MathCos(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
return %_MathCos(x);
return %_MathCos(TO_NUMBER_INLINE(x));
}
// ECMA 262 - 15.8.2.8
function MathExp(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
return %Math_exp(x);
return %Math_exp(TO_NUMBER_INLINE(x));
}
// ECMA 262 - 15.8.2.9
function MathFloor(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
x = TO_NUMBER_INLINE(x);
// It's more common to call this with a positive number that's out
// of range than negative numbers; check the upper bound first.
if (x < 0x80000000 && x > 0) {
@ -113,16 +105,15 @@ function MathFloor(x) {
// ECMA 262 - 15.8.2.10
function MathLog(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
return %_MathLog(x);
return %_MathLog(TO_NUMBER_INLINE(x));
}
// ECMA 262 - 15.8.2.11
function MathMax(arg1, arg2) { // length == 2
var length = %_ArgumentsLength();
if (length == 2) {
if (!IS_NUMBER(arg1)) arg1 = NonNumberToNumber(arg1);
if (!IS_NUMBER(arg2)) arg2 = NonNumberToNumber(arg2);
arg1 = TO_NUMBER_INLINE(arg1);
arg2 = TO_NUMBER_INLINE(arg2);
if (arg2 > arg1) return arg2;
if (arg1 > arg2) return arg1;
if (arg1 == arg2) {
@ -151,8 +142,8 @@ function MathMax(arg1, arg2) { // length == 2
function MathMin(arg1, arg2) { // length == 2
var length = %_ArgumentsLength();
if (length == 2) {
if (!IS_NUMBER(arg1)) arg1 = NonNumberToNumber(arg1);
if (!IS_NUMBER(arg2)) arg2 = NonNumberToNumber(arg2);
arg1 = TO_NUMBER_INLINE(arg1);
arg2 = TO_NUMBER_INLINE(arg2);
if (arg2 > arg1) return arg1;
if (arg1 > arg2) return arg2;
if (arg1 == arg2) {
@ -179,9 +170,7 @@ function MathMin(arg1, arg2) { // length == 2
// ECMA 262 - 15.8.2.13
function MathPow(x, y) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
if (!IS_NUMBER(y)) y = NonNumberToNumber(y);
return %_MathPow(x, y);
return %_MathPow(TO_NUMBER_INLINE(x), TO_NUMBER_INLINE(y));
}
// ECMA 262 - 15.8.2.14
@ -191,33 +180,27 @@ function MathRandom() {
// ECMA 262 - 15.8.2.15
function MathRound(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
return %RoundNumber(x);
return %RoundNumber(TO_NUMBER_INLINE(x));
}
// ECMA 262 - 15.8.2.16
function MathSin(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
return %_MathSin(x);
return %_MathSin(TO_NUMBER_INLINE(x));
}
// ECMA 262 - 15.8.2.17
function MathSqrt(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
return %_MathSqrt(x);
return %_MathSqrt(TO_NUMBER_INLINE(x));
}
// ECMA 262 - 15.8.2.18
function MathTan(x) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
return %_MathTan(x);
return %_MathTan(TO_NUMBER_INLINE(x));
}
// Non-standard extension.
function MathImul(x, y) {
if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
if (!IS_NUMBER(y)) y = NonNumberToNumber(y);
return %NumberImul(x, y);
return %NumberImul(TO_NUMBER_INLINE(x), TO_NUMBER_INLINE(y));
}

51
test/mjsunit/harmony/math-trunc.js Normal file
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@ -0,0 +1,51 @@
// 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: --harmony-maths
assertEquals("Infinity", String(1/Math.trunc(0)));
assertEquals("-Infinity", String(1/Math.trunc(-0)));
assertEquals("Infinity", String(1/Math.trunc(Math.PI/4)));
assertEquals("-Infinity", String(1/Math.trunc(-Math.sqrt(2)/2)));
assertEquals(100, Math.trunc(100));
assertEquals(-199, Math.trunc(-199));
assertEquals(100, Math.trunc(100.1));
assertTrue(isNaN(Math.trunc("abc")));
assertTrue(isNaN(Math.trunc({})));
assertEquals(0, Math.trunc([]));
assertEquals(1, Math.trunc([1]));
assertEquals(-100, Math.trunc([-100.1]));
assertTrue(isNaN(Math.trunc([1, 1])));
assertEquals(-100, Math.trunc({ toString: function() { return "-100.3"; } }));
assertEquals(10, Math.trunc({ toString: function() { return 10.1; } }));
assertEquals(-1, Math.trunc({ valueOf: function() { return -1.1; } }));
assertEquals("-Infinity",
String(1/Math.trunc({ valueOf: function() { return "-0.1"; } })));
assertEquals("-Infinity", String(Math.trunc(-Infinity)));
assertEquals("Infinity", String(Math.trunc(Infinity)));
assertEquals("-Infinity", String(Math.trunc("-Infinity")));
assertEquals("Infinity", String(Math.trunc("Infinity")));