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Improve the accuracy of tgamma (BZ #26983)
[thirdparty/glibc.git] / math / w_cosh_compat.c
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e6855a3b 1/* Optimizations by Ulrich Drepper <drepper@gmail.com>, 2011 */
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2/*
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5 *
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
cccda09f 8 * software is freely granted, provided that this notice
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9 * is preserved.
10 * ====================================================
11 */
12
cccda09f 13/*
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14 * wrapper cosh(x)
15 */
16
9d13fb24 17#include <math.h>
9277c064 18#include <math_private.h>
813378e9 19#include <math-svid-compat.h>
9ac44708 20#include <libm-alias-double.h>
f7eac6eb 21
4f3647e4 22#if LIBM_SVID_COMPAT
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23double
24__cosh (double x)
f7eac6eb 25{
0ac5ae23 26 double z = __ieee754_cosh (x);
d81f90cc 27 if (__builtin_expect (!isfinite (z), 0) && isfinite (x)
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28 && _LIB_VERSION != _IEEE_)
29 return __kernel_standard (x, x, 5); /* cosh overflow */
30
31 return z;
f7eac6eb 32}
9ac44708 33libm_alias_double (__cosh, cosh)
cccda09f 34#endif