1 /* origin: FreeBSD /usr/src/lib/msun/src/k_logf.h */
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
10 * ====================================================
13 * See comments in __log1p.h.
16 /* |(log(1+s)-log(1-s))/s - Lg(s)| < 2**-34.24 (~[-4.95e-11, 4.97e-11]). */
18 Lg1 = 0xaaaaaa.0p-24, /* 0.66666662693 */
19 Lg2 = 0xccce13.0p-25, /* 0.40000972152 */
20 Lg3 = 0x91e9ee.0p-25, /* 0.28498786688 */
21 Lg4 = 0xf89e26.0p-26; /* 0.24279078841 */
23 static inline float __log1pf(float f)
25 float hfsq,s,z,R,w,t1,t2;