summary refs log tree commit diff
path: root/sysdeps/ieee754/ldbl-128ibm/e_atanhl.c
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/e_atanhl.c')
-rw-r--r--sysdeps/ieee754/ldbl-128ibm/e_atanhl.c79
1 files changed, 0 insertions, 79 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_atanhl.c b/sysdeps/ieee754/ldbl-128ibm/e_atanhl.c
deleted file mode 100644
index a801bd6f74..0000000000
--- a/sysdeps/ieee754/ldbl-128ibm/e_atanhl.c
+++ /dev/null
@@ -1,79 +0,0 @@
-/* @(#)e_atanh.c 5.1 93/09/24 */
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: e_atanh.c,v 1.8 1995/05/10 20:44:55 jtc Exp $";
-#endif
-
-/* __ieee754_atanh(x)
- * Method :
- *    1.Reduced x to positive by atanh(-x) = -atanh(x)
- *    2.For x>=0.5
- *                  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))
- *
- * Special cases:
- *	atanh(x) is NaN if |x| > 1 with signal;
- *	atanh(NaN) is that NaN with no signal;
- *	atanh(+-1) is +-INF with signal.
- *
- */
-
-#include "math.h"
-#include "math_private.h"
-
-#ifdef __STDC__
-static const long double one = 1.0L, huge = 1e300L;
-#else
-static long double one = 1.0L, huge = 1e300L;
-#endif
-
-#ifdef __STDC__
-static const long double zero = 0.0L;
-#else
-static long double zero = 0.0L;
-#endif
-
-#ifdef __STDC__
-	long double __ieee754_atanhl(long double x)
-#else
-	long double __ieee754_atanhl(x)
-	long double x;
-#endif
-{
-	long double t;
-	int64_t hx,ix;
-	u_int64_t lx;
-	GET_LDOUBLE_WORDS64(hx,lx,x);
-	ix = hx&0x7fffffffffffffffLL;
-	if (ix >= 0x3ff0000000000000LL) { /* |x|>=1 */
-	    if (ix > 0x3ff0000000000000LL)
-	    	return (x-x)/(x-x);
-	    t = fabsl (x);
-	    if (t > one)
-		return (x-x)/(x-x);
-	    if (t == one)
-		return x/zero;
-	}
-	if(ix<0x3e20000000000000LL&&(huge+x)>zero) return x;	/* x<2**-29 */
-	x = fabsl (x);
-	if(ix<0x3fe0000000000000LL) {		/* x < 0.5 */
-	    t = x+x;
-	    t = 0.5*__log1pl(t+t*x/(one-x));
-	} else
-	    t = 0.5*__log1pl((x+x)/(one-x));
-	if(hx>=0) return t; else return -t;
-}