diff options
Diffstat (limited to 'lib/msun/src/e_atanh.c')
| -rw-r--r-- | lib/msun/src/e_atanh.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/lib/msun/src/e_atanh.c b/lib/msun/src/e_atanh.c index 7d85023..aeb8a75 100644 --- a/lib/msun/src/e_atanh.c +++ b/lib/msun/src/e_atanh.c @@ -5,13 +5,13 @@ * * Developed at SunPro, a Sun Microsystems, Inc. business. * Permission to use, copy, modify, and distribute this - * software is freely granted, provided that this notice + * software is freely granted, provided that this notice * is preserved. * ==================================================== */ #ifndef lint -static char rcsid[] = "$Id: e_atanh.c,v 1.6 1994/08/18 23:05:12 jtc Exp $"; +static char rcsid[] = "$Id: e_atanh.c,v 1.1.1.1 1994/08/19 09:39:43 jkh Exp $"; #endif /* __ieee754_atanh(x) @@ -21,7 +21,7 @@ static char rcsid[] = "$Id: e_atanh.c,v 1.6 1994/08/18 23:05:12 jtc Exp $"; * 1 2x x * atanh(x) = --- * log(1 + -------) = 0.5 * log1p(2 * --------) * 2 1 - x 1 - x - * + * * For x<0.5 * atanh(x) = 0.5*log1p(2x+2x*x/(1-x)) * @@ -61,14 +61,14 @@ static double zero = 0.0; ix = hx&0x7fffffff; if ((ix|((lx|(-lx))>>31))>0x3ff00000) /* |x|>1 */ return (x-x)/(x-x); - if(ix==0x3ff00000) + if(ix==0x3ff00000) return x/zero; if(ix<0x3e300000&&(huge+x)>zero) return x; /* x<2**-28 */ SET_HIGH_WORD(x,ix); if(ix<0x3fe00000) { /* x < 0.5 */ t = x+x; t = 0.5*log1p(t+t*x/(one-x)); - } else + } else t = 0.5*log1p((x+x)/(one-x)); if(hx>=0) return t; else return -t; } |
