GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libm/src/ld80/s_asinhl.c Lines: 0 14 0.0 %
Date: 2017-11-13 Branches: 0 12 0.0 %

Line Branch Exec Source
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/* @(#)s_asinh.c 5.1 93/09/24 */
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/*
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 * ====================================================
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 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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 *
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 * Developed at SunPro, a Sun Microsystems, Inc. business.
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 * Permission to use, copy, modify, and distribute this
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 * software is freely granted, provided that this notice
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 * is preserved.
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 * ====================================================
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 */
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/* asinhl(x)
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 * Method :
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 *	Based on
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 *		asinhl(x) = signl(x) * logl [ |x| + sqrtl(x*x+1) ]
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 *	we have
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 *	asinhl(x) := x  if  1+x*x=1,
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 *		  := signl(x)*(logl(x)+ln2)) for large |x|, else
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 *		  := signl(x)*logl(2|x|+1/(|x|+sqrtl(x*x+1))) if|x|>2, else
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 *		  := signl(x)*log1pl(|x| + x^2/(1 + sqrtl(1+x^2)))
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 */
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#include <math.h>
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#include "math_private.h"
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static const long double
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one =  1.000000000000000000000e+00L, /* 0x3FFF, 0x00000000, 0x00000000 */
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ln2 =  6.931471805599453094287e-01L, /* 0x3FFE, 0xB17217F7, 0xD1CF79AC */
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huge=  1.000000000000000000e+4900L;
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long double
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asinhl(long double x)
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{
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	long double t,w;
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	int32_t hx,ix;
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	GET_LDOUBLE_EXP(hx,x);
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	ix = hx&0x7fff;
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	if(ix==0x7fff) return x+x;	/* x is inf or NaN */
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	if(ix< 0x3fde) {	/* |x|<2**-34 */
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	    if(huge+x>one) return x;	/* return x inexact except 0 */
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	}
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	if(ix>0x4020) {		/* |x| > 2**34 */
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	    w = logl(fabsl(x))+ln2;
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	} else if (ix>0x4000) {	/* 2**34 > |x| > 2.0 */
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	    t = fabsl(x);
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	    w = logl(2.0*t+one/(sqrtl(x*x+one)+t));
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	} else {		/* 2.0 > |x| > 2**-28 */
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	    t = x*x;
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	    w =log1pl(fabsl(x)+t/(one+sqrtl(one+t)));
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	}
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	if(hx&0x8000) return -w; else return w;
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}