diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/e_sinhl.c')
-rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/e_sinhl.c | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_sinhl.c b/sysdeps/ieee754/ldbl-128ibm/e_sinhl.c deleted file mode 100644 index 38ae71d..0000000 --- a/sysdeps/ieee754/ldbl-128ibm/e_sinhl.c +++ /dev/null @@ -1,84 +0,0 @@ -/* - * ==================================================== - * 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 "math.h" -#include "math_private.h" - -#ifdef __STDC__ -static const long double one = 1.0, shuge = 1.0e307; -#else -static long double one = 1.0, shuge = 1.0e307; -#endif - -#ifdef __STDC__ - long double __ieee754_sinhl(long double x) -#else - long double __ieee754_sinhl(x) - long double x; -#endif -{ - long double t,w,h; - int64_t ix,jx; - - /* High word of |x|. */ - GET_LDOUBLE_MSW64(jx,x); - ix = jx&0x7fffffffffffffffLL; - - /* x is INF or NaN */ - if(ix>=0x7ff0000000000000LL) 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 < 0x4036000000000000LL) { /* |x|<22 */ - if (ix<0x3e20000000000000LL) /* |x|<2**-29 */ - if(shuge+x>one) return x;/* sinhl(tiny) = tiny with inexact */ - t = __expm1l(fabsl(x)); - if(ix<0x3ff0000000000000LL) 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 < 0x40862e42fefa39efLL) return h*__ieee754_expl(fabsl(x)); - - /* |x| in [log(maxdouble), overflowthresold] */ - if (ix <= 0x408633ce8fb9f87dLL) { - w = __ieee754_expl(0.5*fabsl(x)); - t = h*w; - return t*w; - } - - /* |x| > overflowthresold, sinh(x) overflow */ - return x*shuge; -} |