1 /* s_asinhf.c -- float version of s_asinh.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
4 * $FreeBSD: src/lib/msun/src/s_asinhf.c,v 1.6 1999/08/28 00:06:43 peter Exp $
5 * $DragonFly: src/lib/msun/src/Attic/s_asinhf.c,v 1.2 2003/06/17 04:26:53 dillon Exp $
9 * ====================================================
10 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
12 * Developed at SunPro, a Sun Microsystems, Inc. business.
13 * Permission to use, copy, modify, and distribute this
14 * software is freely granted, provided that this notice
16 * ====================================================
20 #include "math_private.h"
27 one = 1.0000000000e+00, /* 0x3F800000 */
28 ln2 = 6.9314718246e-01, /* 0x3f317218 */
29 huge= 1.0000000000e+30;
42 if(ix>=0x7f800000) return x+x; /* x is inf or NaN */
43 if(ix< 0x31800000) { /* |x|<2**-28 */
44 if(huge+x>one) return x; /* return x inexact except 0 */
46 if(ix>0x4d800000) { /* |x| > 2**28 */
47 w = __ieee754_logf(fabsf(x))+ln2;
48 } else if (ix>0x40000000) { /* 2**28 > |x| > 2.0 */
50 w = __ieee754_logf((float)2.0*t+one/(__ieee754_sqrtf(x*x+one)+t));
51 } else { /* 2.0 > |x| > 2**-28 */
53 w =log1pf(fabsf(x)+t/(one+__ieee754_sqrtf(one+t)));
55 if(hx>0) return w; else return -w;