1 /* s_asinhf.c -- float version of s_asinh.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
13 * ====================================================
17 static char rcsid[] = "$FreeBSD: src/lib/msun/src/s_asinhf.c,v 1.6 1999/08/28 00:06:43 peter Exp $";
21 #include "math_private.h"
28 one = 1.0000000000e+00, /* 0x3F800000 */
29 ln2 = 6.9314718246e-01, /* 0x3f317218 */
30 huge= 1.0000000000e+30;
43 if(ix>=0x7f800000) return x+x; /* x is inf or NaN */
44 if(ix< 0x31800000) { /* |x|<2**-28 */
45 if(huge+x>one) return x; /* return x inexact except 0 */
47 if(ix>0x4d800000) { /* |x| > 2**28 */
48 w = __ieee754_logf(fabsf(x))+ln2;
49 } else if (ix>0x40000000) { /* 2**28 > |x| > 2.0 */
51 w = __ieee754_logf((float)2.0*t+one/(__ieee754_sqrtf(x*x+one)+t));
52 } else { /* 2.0 > |x| > 2**-28 */
54 w =log1pf(fabsf(x)+t/(one+__ieee754_sqrtf(one+t)));
56 if(hx>0) return w; else return -w;