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<meta charset='utf-8'>
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.pass {
    font-weight: bold;
    color: green;
}
.fail {
    font-weight: bold;
    color: red;
}
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<script>
if (window.testRunner)
    testRunner.dumpAsText();

function SputnikError(message)
{
    this.message = message;
}

SputnikError.prototype.toString = function ()
{
    return 'SputnikError: ' + this.message;
};

var sputnikException;

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    document.getElementById("console").appendChild(span); // insert it first so XHTML knows the namespace 
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function escapeHTML(text)
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    testPrint('<span><span class="pass">PASS</span> ' + escapeHTML(msg) + '</span>');
}

function printTestFailed(msg)
{
    testPrint('<span><span class="fail">FAIL</span> ' + escapeHTML(msg) + '</span>');
}

function testFailed(msg)
{
    throw new SputnikError(msg);
}

var successfullyParsed = false;
</script>

</head>
<body>
<p>S15.8.2.3_A6</p>
<div id='console'></div>
<script>
try {

/**
 * @name: S15.8.2.3_A6;
 * @section: 15.8.2.3;
 * @assertion: Math.asin, recommended that implementations use the approximation algorithms for IEEE 754 arithmetic contained in fdlibm;
 * @description: Checking if Math.asin is approximately equals to its mathematical values on the set of 64 argument values; all the sample values is calculated with LibC;
 */
 
function getPrecision(num)
{
	//TODO: Create a table of prec's,
	//      because using Math for testing Math isn't that correct. 
	
	log2num = Math.log(Math.abs(num))/Math.LN2;
	pernum = Math.ceil(log2num);
	return(2 * Math.pow(2, -52 + pernum));
	//return(0);
}


var prec;
function isEqual(num1, num2)
{
	if ((num1 === Infinity)&&(num2 === Infinity))
	{
		return(true);
	}
	if ((num1 === -Infinity)&&(num2 === -Infinity))
	{
		return(true);
	}
	prec = getPrecision(Math.min(Math.abs(num1), Math.abs(num2)));	
	return(Math.abs(num1 - num2) <= prec);
	//return(num1 === num2);
}


// CHECK#1
vnum = 64;
var x = new Array();
x[0] = -1.00000000000000000000;
x[1] = -0.96825396825396826000;
x[2] = -0.93650793650793651000;
x[3] = -0.90476190476190477000;
x[4] = -0.87301587301587302000;
x[5] = -0.84126984126984128000;
x[6] = -0.80952380952380953000;
x[7] = -0.77777777777777779000;
x[8] = -0.74603174603174605000;
x[9] = -0.71428571428571430000;
x[10] = -0.68253968253968256000;
x[11] = -0.65079365079365081000;
x[12] = -0.61904761904761907000;
x[13] = -0.58730158730158732000;
x[14] = -0.55555555555555558000;
x[15] = -0.52380952380952384000;
x[16] = -0.49206349206349209000;
x[17] = -0.46031746031746035000;
x[18] = -0.42857142857142860000;
x[19] = -0.39682539682539686000;
x[20] = -0.36507936507936511000;
x[21] = -0.33333333333333337000;
x[22] = -0.30158730158730163000;
x[23] = -0.26984126984126988000;
x[24] = -0.23809523809523814000;
x[25] = -0.20634920634920639000;
x[26] = -0.17460317460317465000;
x[27] = -0.14285714285714290000;
x[28] = -0.11111111111111116000;
x[29] = -0.07936507936507941600;
x[30] = -0.04761904761904767200;
x[31] = -0.01587301587301592800;
x[32] = 0.01587301587301581700;
x[33] = 0.04761904761904767200;
x[34] = 0.07936507936507930500;
x[35] = 0.11111111111111116000;
x[36] = 0.14285714285714279000;
x[37] = 0.17460317460317465000;
x[38] = 0.20634920634920628000;
x[39] = 0.23809523809523814000;
x[40] = 0.26984126984126977000;
x[41] = 0.30158730158730163000;
x[42] = 0.33333333333333326000;
x[43] = 0.36507936507936511000;
x[44] = 0.39682539682539675000;
x[45] = 0.42857142857142860000;
x[46] = 0.46031746031746024000;
x[47] = 0.49206349206349209000;
x[48] = 0.52380952380952372000;
x[49] = 0.55555555555555558000;
x[50] = 0.58730158730158721000;
x[51] = 0.61904761904761907000;
x[52] = 0.65079365079365070000;
x[53] = 0.68253968253968256000;
x[54] = 0.71428571428571419000;
x[55] = 0.74603174603174605000;
x[56] = 0.77777777777777768000;
x[57] = 0.80952380952380953000;
x[58] = 0.84126984126984117000;
x[59] = 0.87301587301587302000;
x[60] = 0.90476190476190466000;
x[61] = 0.93650793650793651000;
x[62] = 0.96825396825396814000;
x[63] = 1.00000000000000000000;


var y = new Array();
y[0] = -1.57079632679489660000;
y[1] = -1.31814860051033310000;
y[2] = -1.21253510828227990000;
y[3] = -1.13082037200397780000;
y[4] = -1.06135247798300370000;
y[5] = -0.99962782822935903000;
y[6] = -0.94334055387170590000;
y[7] = -0.89112250788665281000;
y[8] = -0.84208287605149101000;
y[9] = -0.79560295348453536000;
y[10] = -0.75123199912663585000;
y[11] = -0.70862927156238398000;
y[12] = -0.66752944463583297000;
y[13] = -0.62772081765791266000;
y[14] = -0.58903097021627393000;
y[15] = -0.55131696913188277000;
y[16] = -0.51445847556118673000;
y[17] = -0.47835276464925774000;
y[18] = -0.44291104407363896000;
y[19] = -0.40805567730127851000;
y[20] = -0.37371805094291394000;
y[21] = -0.33983690945412198000;
y[22] = -0.30635703455691915000;
y[23] = -0.27322818254063785000;
y[24] = -0.24040421676925938000;
y[25] = -0.20784238935334678000;
y[26] = -0.17550273757572274000;
y[27] = -0.14334756890536540000;
y[28] = -0.11134101434096394000;
y[29] = -0.07944863408513722100;
y[30] = -0.04763706262440318300;
y[31] = -0.01587368248995573600;
y[32] = 0.01587368248995562500;
y[33] = 0.04763706262440318300;
y[34] = 0.07944863408513711000;
y[35] = 0.11134101434096394000;
y[36] = 0.14334756890536529000;
y[37] = 0.17550273757572274000;
y[38] = 0.20784238935334667000;
y[39] = 0.24040421676925938000;
y[40] = 0.27322818254063774000;
y[41] = 0.30635703455691915000;
y[42] = 0.33983690945412187000;
y[43] = 0.37371805094291394000;
y[44] = 0.40805567730127840000;
y[45] = 0.44291104407363896000;
y[46] = 0.47835276464925758000;
y[47] = 0.51445847556118673000;
y[48] = 0.55131696913188266000;
y[49] = 0.58903097021627393000;
y[50] = 0.62772081765791254000;
y[51] = 0.66752944463583297000;
y[52] = 0.70862927156238387000;
y[53] = 0.75123199912663585000;
y[54] = 0.79560295348453514000;
y[55] = 0.84208287605149101000;
y[56] = 0.89112250788665259000;
y[57] = 0.94334055387170590000;
y[58] = 0.99962782822935881000;
y[59] = 1.06135247798300370000;
y[60] = 1.13082037200397760000;
y[61] = 1.21253510828227990000;
y[62] = 1.31814860051033270000;
y[63] = 1.57079632679489660000;


var val;
for (i = 0; i < vnum; i++)
{
	val = Math.asin(x[i]);
	if (!isEqual(val, y[i]))
	{
		testFailed("\nx = " + x[i] + "\nlibc.asin(x) = " + y[i] + "\nMath.asin(x) = " + Math.asin(x[i]) + "\nMath.abs(libc.asin(x) - Math.asin(x)) > " + prec + "\n\n"); 
	}
}

} catch (ex) {
    sputnikException = ex;
}

var successfullyParsed = true;
</script>

<script>
if (!successfullyParsed)
    printTestFailed('successfullyParsed is not set');
else if (sputnikException)
    printTestFailed(sputnikException);
else
    printTestPassed("");
testPrint('<br /><span class="pass">TEST COMPLETE</span>');
</script>
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</html>