1 /* origin: FreeBSD /usr/src/lib/msun/src/s_asinhf.c */
3 * 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 * ====================================================
19 one = 1.0000000000e+00, /* 0x3F800000 */
20 ln2 = 6.9314718246e-01, /* 0x3f317218 */
21 huge= 1.0000000000e+30;
28 GET_FLOAT_WORD(hx, x);
30 if (ix >= 0x7f800000) /* x is inf or NaN */
32 if (ix < 0x31800000) { /* |x| < 2**-28 */
33 /* return x inexact except 0 */
37 if (ix > 0x4d800000) { /* |x| > 2**28 */
38 w = logf(fabsf(x)) + ln2;
39 } else if (ix > 0x40000000) { /* 2**28 > |x| > 2.0 */
41 w = logf(2.0f*t + one/(sqrtf(x*x+one)+t));
42 } else { /* 2.0 > |x| > 2**-28 */
44 w =log1pf(fabsf(x) + t/(one+sqrtf(one+t)));