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Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/s_tanhl.c')
-rw-r--r--sysdeps/ieee754/ldbl-128ibm/s_tanhl.c90
1 files changed, 0 insertions, 90 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_tanhl.c b/sysdeps/ieee754/ldbl-128ibm/s_tanhl.c
deleted file mode 100644
index 851ca125f6..0000000000
--- a/sysdeps/ieee754/ldbl-128ibm/s_tanhl.c
+++ /dev/null
@@ -1,90 +0,0 @@
-/* @(#)s_tanh.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: s_tanh.c,v 1.7 1995/05/10 20:48:22 jtc Exp $";
-#endif
-
-/* Tanh(x)
- * Return the Hyperbolic Tangent of x
- *
- * Method :
- * x -x
- * e - e
- * 0. tanh(x) is defined to be -----------
- * x -x
- * e + e
- * 1. reduce x to non-negative by tanh(-x) = -tanh(x).
- * 2. 0 <= x <= 2**-57 : tanh(x) := x*(one+x)
- * -t
- * 2**-57 < x <= 1 : tanh(x) := -----; t = expm1(-2x)
- * t + 2
- * 2
- * 1 <= x <= 22.0 : tanh(x) := 1- ----- ; t=expm1(2x)
- * t + 2
- * 22.0 < x <= INF : tanh(x) := 1.
- *
- * Special cases:
- * tanh(NaN) is NaN;
- * only tanh(0)=0 is exact for finite argument.
- */
-
-#include "math.h"
-#include "math_private.h"
-#include <math_ldbl_opt.h>
-
-#ifdef __STDC__
-static const long double one=1.0L, two=2.0L, tiny = 1.0e-300L;
-#else
-static long double one=1.0L, two=2.0L, tiny = 1.0e-300L;
-#endif
-
-#ifdef __STDC__
- long double __tanhl(long double x)
-#else
- long double __tanhl(x)
- long double x;
-#endif
-{
- long double t,z;
- int64_t jx,ix,lx;
-
- /* High word of |x|. */
- GET_LDOUBLE_WORDS64(jx,lx,x);
- ix = jx&0x7fffffffffffffffLL;
-
- /* x is INF or NaN */
- if(ix>=0x7ff0000000000000LL) {
- if (jx>=0) return one/x+one; /* tanh(+-inf)=+-1 */
- else return one/x-one; /* tanh(NaN) = NaN */
- }
-
- /* |x| < 22 */
- if (ix < 0x4036000000000000LL) { /* |x|<22 */
- if ((ix | (lx&0x7fffffffffffffffLL)) == 0)
- return x; /* x == +-0 */
- if (ix<0x3c60000000000000LL) /* |x|<2**-57 */
- return x*(one+x); /* tanh(small) = small */
- if (ix>=0x3ff0000000000000LL) { /* |x|>=1 */
- t = __expm1l(two*fabsl(x));
- z = one - two/(t+two);
- } else {
- t = __expm1l(-two*fabsl(x));
- z= -t/(t+two);
- }
- /* |x| > 22, return +-1 */
- } else {
- z = one - tiny; /* raised inexact flag */
- }
- return (jx>=0)? z: -z;
-}
-long_double_symbol (libm, __tanhl, tanhl);