diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/e_sinh.c')
-rw-r--r-- | sysdeps/ieee754/dbl-64/e_sinh.c | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/sysdeps/ieee754/dbl-64/e_sinh.c b/sysdeps/ieee754/dbl-64/e_sinh.c deleted file mode 100644 index 8479bdd9b8..0000000000 --- a/sysdeps/ieee754/dbl-64/e_sinh.c +++ /dev/null @@ -1,90 +0,0 @@ -/* @(#)e_sinh.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_sinh.c,v 1.7 1995/05/10 20:46:13 jtc Exp $"; -#endif - -/* __ieee754_sinh(x) - * Method : - * mathematically sinh(x) if defined to be (exp(x)-exp(-x))/2 - * 1. Replace x by |x| (sinh(-x) = -sinh(x)). - * 2. - * E + E/(E+1) - * 0 <= x <= 22 : sinh(x) := --------------, E=expm1(x) - * 2 - * - * 22 <= x <= lnovft : sinh(x) := exp(x)/2 - * lnovft <= x <= ln2ovft: sinh(x) := exp(x/2)/2 * exp(x/2) - * ln2ovft < x : sinh(x) := x*shuge (overflow) - * - * Special cases: - * sinh(x) is |x| if x is +INF, -INF, or NaN. - * only sinh(0)=0 is exact for finite x. - */ - -#include <float.h> -#include <math.h> -#include <math_private.h> - -static const double one = 1.0, shuge = 1.0e307; - -double -__ieee754_sinh (double x) -{ - double t, w, h; - int32_t ix, jx; - u_int32_t lx; - - /* High word of |x|. */ - GET_HIGH_WORD (jx, x); - ix = jx & 0x7fffffff; - - /* x is INF or NaN */ - if (__glibc_unlikely (ix >= 0x7ff00000)) - return x + x; - - h = 0.5; - if (jx < 0) - h = -h; - /* |x| in [0,22], return sign(x)*0.5*(E+E/(E+1))) */ - if (ix < 0x40360000) /* |x|<22 */ - { - if (__glibc_unlikely (ix < 0x3e300000)) { /* |x|<2**-28 */ - math_check_force_underflow (x); - if (shuge + x > one) - return x; - /* sinh(tiny) = tiny with inexact */ - } - t = __expm1 (fabs (x)); - if (ix < 0x3ff00000) - return h * (2.0 * t - t * t / (t + one)); - return h * (t + t / (t + one)); - } - - /* |x| in [22, log(maxdouble)] return 0.5*exp(|x|) */ - if (ix < 0x40862e42) - return h * __ieee754_exp (fabs (x)); - - /* |x| in [log(maxdouble), overflowthresold] */ - GET_LOW_WORD (lx, x); - if (ix < 0x408633ce || ((ix == 0x408633ce) && (lx <= (u_int32_t) 0x8fb9f87d))) - { - w = __ieee754_exp (0.5 * fabs (x)); - t = h * w; - return t * w; - } - - /* |x| > overflowthresold, sinh(x) overflow */ - return math_narrow_eval (x * shuge); -} -strong_alias (__ieee754_sinh, __sinh_finite) |