c87168bc8c
Import base::ieee754::tan() from fdlibm and introduce Float64Tan TurboFan operator based on that, similar to what we do for Float64Cos and Float64Sin. Rewrite Math.tan() as TurboFan builtin and use those operators to also inline Math.tan() into optimized TurboFan functions. Drive-by-fix: Kill the %_ConstructDouble intrinsics, and provide only the %ConstructDouble runtime entry for writing tests. BUG=v8:5086,v8:5126 R=yangguo@chromium.org Review-Url: https://codereview.chromium.org/2083453002 Cr-Commit-Position: refs/heads/master@{#37087}
103 lines
3.9 KiB
JavaScript
103 lines
3.9 KiB
JavaScript
// Copyright 2013 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --allow-natives-syntax
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[Math.log10, Math.log2].forEach( function(fun) {
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assertTrue(isNaN(fun(NaN)));
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assertTrue(isNaN(fun(fun)));
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assertTrue(isNaN(fun({ toString: function() { return NaN; } })));
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assertTrue(isNaN(fun({ valueOf: function() { return -1; } })));
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assertTrue(isNaN(fun({ valueOf: function() { return "abc"; } })));
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assertTrue(isNaN(fun(-0.1)));
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assertTrue(isNaN(fun(-1)));
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assertEquals("-Infinity", String(fun(0)));
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assertEquals("-Infinity", String(fun(-0)));
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assertEquals(0, fun(1));
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assertEquals("Infinity", String(fun(Infinity)));
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});
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for (var i = -310; i <= 308; i += 0.5) {
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assertEquals(i, Math.log10(Math.pow(10, i)));
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// Square roots are tested below.
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if (i != -0.5 && i != 0.5) assertEquals(i, Math.log2(Math.pow(2, i)));
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}
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// Test denormals.
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assertEquals(-307.77759430519706, Math.log10(1.5 * Math.pow(2, -1023)));
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// Issue 4025. Remove delta once issue 4029 has been fixed.
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assertEqualsDelta(-9.643274665532873e-17, Math.log10(1-Number.EPSILON), 3e-32);
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// Test Math.log2(2^k) for -1074 <= k <= 1023.
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var n = -1074;
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// This loop covers n from -1074 to -1043
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for (var lowbits = 1; lowbits <= 0x80000000; lowbits *= 2) {
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var x = %ConstructDouble(0, lowbits);
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assertEquals(n, Math.log2(x));
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n++;
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}
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// This loop covers n from -1042 to -1023
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for (var hibits = 1; hibits <= 0x80000; hibits *= 2) {
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var x = %ConstructDouble(hibits, 0);
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assertEquals(n, Math.log2(x));
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n++;
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}
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// The rest of the normal values of 2^n
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var x = 1;
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for (var n = -1022; n <= 1023; ++n) {
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var x = Math.pow(2, n);
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assertEquals(n, Math.log2(x));
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}
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// Test special values.
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// Expectation isn't exactly 1/2 because Math.SQRT2 isn't exactly sqrt(2).
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assertEquals(0.5000000000000001, Math.log2(Math.SQRT2));
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// Expectation isn't exactly -1/2 because Math.SQRT1_2 isn't exactly sqrt(1/2).
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assertEquals(-0.4999999999999999, Math.log2(Math.SQRT1_2));
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assertEquals(3.321928094887362, Math.log2(10));
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assertEquals(6.643856189774724, Math.log2(100));
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// Test relationships
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x = 1;
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for (var k = 0; k < 1000; ++k) {
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var y = Math.abs(Math.log2(x) + Math.log2(1/x));
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assertEqualsDelta(0, y, 1.5e-14);
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x *= 1.1;
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}
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x = Math.pow(2, -100);
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for (var k = 0; k < 1000; ++k) {
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var y = Math.log2(x);
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var expected = Math.log(x) / Math.LN2;
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var err = Math.abs(y - expected) / expected;
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assertEqualsDelta(0, err, 1e-15);
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x *= 1.1;
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}
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