1 // Copyright 2013 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
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13 // contributors may be used to endorse or promote products derived
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16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 // TODO(3468): we rely on a precise Math.exp.
29 // Flags: --no-fast-math
31 [Math.sinh, Math.cosh, Math.tanh, Math.asinh, Math.acosh, Math.atanh].
32 forEach(function(fun) {
33 assertTrue(isNaN(fun(NaN)));
34 assertTrue(isNaN(fun("abc")));
35 assertTrue(isNaN(fun({})));
36 assertEquals(fun(0), fun([]));
37 assertTrue(isNaN(fun([1, 1])));
38 assertEquals(fun(1.11), fun({ toString: function() { return "1.11"; } }));
39 assertEquals(fun(-3.1), fun({ toString: function() { return -3.1; } }));
40 assertEquals(fun(-1.1), fun({ valueOf: function() { return "-1.1"; } }));
41 assertEquals(fun(3.11), fun({ valueOf: function() { return 3.11; } }));
45 function test_id(fun, rev, value) {
46 assertEqualsDelta(1, rev(fun(value))/value, 1E-7);
49 [Math.PI, 2, 5, 1E-5, 0.3].forEach(function(x) {
50 test_id(Math.sinh, Math.asinh, x);
51 test_id(Math.sinh, Math.asinh, -x);
52 test_id(Math.cosh, Math.acosh, x);
53 test_id(Math.tanh, Math.atanh, x);
54 test_id(Math.tanh, Math.atanh, -x);
58 [Math.sinh, Math.asinh, Math.tanh, Math.atanh].forEach(function(fun) {
59 assertEquals("-Infinity", String(1/fun(-0)));
60 assertEquals("Infinity", String(1/fun(0)));
64 [Math.sinh, Math.asinh].forEach(function(fun) {
65 assertEquals("-Infinity", String(fun(-Infinity)));
66 assertEquals("Infinity", String(fun(Infinity)));
67 assertEquals("-Infinity", String(fun("-Infinity")));
68 assertEquals("Infinity", String(fun("Infinity")));
72 assertEquals(Infinity, Math.cosh(-Infinity));
73 assertEquals(Infinity, Math.cosh(Infinity));
74 assertEquals(Infinity, Math.cosh("-Infinity"));
75 assertEquals(Infinity, Math.cosh("Infinity"));
78 assertEquals(-Infinity, Math.atanh(-1));
79 assertEquals(Infinity, Math.atanh(1));
81 // Math.atanh(x) is NaN for |x| > 1 and NaN
82 [1.000000000001, Math.PI, 10000000, 2, Infinity, NaN].forEach(function(x) {
83 assertTrue(isNaN(Math.atanh(-x)));
84 assertTrue(isNaN(Math.atanh(x)));
88 assertEquals(0, Math.sinh(0));
89 assertEquals(-Infinity, 1/Math.sinh(-0));
90 assertEquals(1, Math.tanh(Infinity));
91 assertEquals(-1, Math.tanh(-Infinity));
92 assertEquals(1, Math.cosh(0));
93 assertEquals(1, Math.cosh(-0));
95 assertEquals(0, Math.acosh(1));
96 assertEquals("Infinity", String(Math.acosh(Infinity)));
98 // Math.acosh(x) is NaN for x < 1
99 [0.99999999999, 0.2, -1000, 0, -0].forEach(function(x) {
100 assertTrue(isNaN(Math.acosh(x)));
104 // Some random samples.
105 assertEqualsDelta(74.20321057778875, Math.sinh(5), 1E-12);
106 assertEqualsDelta(-74.20321057778875, Math.sinh(-5), 1E-12);
108 assertEqualsDelta(1.1276259652063807, Math.cosh(0.5), 1E-12);
109 assertEqualsDelta(74.20994852478785, Math.cosh(5), 1E-12);
110 assertEqualsDelta(1.1276259652063807, Math.cosh(-0.5), 1E-12);
111 assertEqualsDelta(74.20994852478785, Math.cosh(-5), 1E-12);
113 assertEqualsDelta(0.4621171572600, Math.tanh(0.5), 1E-12);
114 assertEqualsDelta(0.9999092042625, Math.tanh(5), 1E-12);
115 assertEqualsDelta(-0.4621171572600, Math.tanh(-0.5), 1E-12);
116 assertEqualsDelta(-0.9999092042625, Math.tanh(-5), 1E-12);
118 assertEqualsDelta(0.4812118250596, Math.asinh(0.5), 1E-12);
119 assertEqualsDelta(2.3124383412727, Math.asinh(5), 1E-12);
120 assertEqualsDelta(-0.4812118250596, Math.asinh(-0.5), 1E-12);
121 assertEqualsDelta(-2.3124383412727, Math.asinh(-5), 1E-12);
123 assertEqualsDelta(0.9624236501192, Math.acosh(1.5), 1E-12);
124 assertEqualsDelta(2.2924316695612, Math.acosh(5), 1E-12);
125 assertEqualsDelta(0.4435682543851, Math.acosh(1.1), 1E-12);
126 assertEqualsDelta(1.3169578969248, Math.acosh(2), 1E-12);
128 assertEqualsDelta(0.5493061443341, Math.atanh(0.5), 1E-12);
129 assertEqualsDelta(0.1003353477311, Math.atanh(0.1), 1E-12);
130 assertEqualsDelta(-0.5493061443341, Math.atanh(-0.5), 1E-12);
131 assertEqualsDelta(-0.1003353477311, Math.atanh(-0.1), 1E-12);
133 [0, 1E-50, 1E-10, 1E10, 1E50, 1E100, 1E150].forEach(function(x) {
134 assertEqualsDelta(Math.asinh(x), -Math.asinh(-x), 1E-12);
137 [1-(1E-16), 0, 1E-10, 1E-50].forEach(function(x) {
138 assertEqualsDelta(Math.atanh(x), -Math.atanh(-x), 1E-12);
142 // Implementation-specific tests for sinh.
144 assertEquals(Math.pow(2, -29), Math.sinh(Math.pow(2, -29)));
145 assertEquals(-Math.pow(2, -29), Math.sinh(-Math.pow(2, -29)));
147 assertEquals(0.5210953054937474, Math.sinh(0.5));
148 assertEquals(-0.5210953054937474, Math.sinh(-0.5));
149 // sinh(10*log(2)) = 1048575/2048, case |x| < 22
150 assertEquals(1048575/2048, Math.sinh(10*Math.LN2));
151 assertEquals(-1048575/2048, Math.sinh(-10*Math.LN2));
153 assertEquals(11013.232874703393, Math.sinh(10));
154 assertEquals(-11013.232874703393, Math.sinh(-10));
155 // Case |x| in [22, log(maxdouble)]
156 assertEquals(2.1474836479999983e9, Math.sinh(32*Math.LN2));
157 assertEquals(-2.1474836479999983e9, Math.sinh(-32*Math.LN2));
158 // Case |x| in [22, log(maxdouble)]
159 assertEquals(1.3440585709080678e43, Math.sinh(100));
160 assertEquals(-1.3440585709080678e43, Math.sinh(-100));
161 // No overflow, case |x| in [log(maxdouble), threshold]
162 assertEquals(1.7976931348621744e308, Math.sinh(710.4758600739439));
163 assertEquals(-1.7976931348621744e308, Math.sinh(-710.4758600739439));
164 // Overflow, case |x| > threshold
165 assertEquals(Infinity, Math.sinh(710.475860073944));
166 assertEquals(-Infinity, Math.sinh(-710.475860073944));
167 assertEquals(Infinity, Math.sinh(1000));
168 assertEquals(-Infinity, Math.sinh(-1000));
170 // Implementation-specific tests for cosh.
172 assertEquals(1, Math.cosh(Math.pow(2, -56)));
173 assertEquals(1, Math.cosh(-Math.pow(2, -56)));
174 // Case |x| < 1/2*log(2). cosh(Math.LN2/4) = (sqrt(2)+1)/2^(5/4)
175 assertEquals(1.0150517651282178, Math.cosh(Math.LN2/4));
176 assertEquals(1.0150517651282178, Math.cosh(-Math.LN2/4));
177 // Case 1/2*log(2) < |x| < 22. cosh(10*Math.LN2) = 1048577/2048
178 assertEquals(512.00048828125, Math.cosh(10*Math.LN2));
179 assertEquals(512.00048828125, Math.cosh(-10*Math.LN2));
180 // Case 22 <= |x| < log(maxdouble)
181 assertEquals(2.1474836479999983e9, Math.cosh(32*Math.LN2));
182 assertEquals(2.1474836479999983e9, Math.cosh(-32*Math.LN2));
183 // Case log(maxdouble) <= |x| <= overflowthreshold
184 assertEquals(1.7976931348621744e308, Math.cosh(710.4758600739439));
185 assertEquals(1.7976931348621744e308, Math.cosh(-710.4758600739439));
187 assertEquals(Infinity, Math.cosh(710.475860073944));
188 assertEquals(Infinity, Math.cosh(-710.475860073944));