diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/e_sinhl.c')
-rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/e_sinhl.c | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_sinhl.c b/sysdeps/ieee754/ldbl-128ibm/e_sinhl.c deleted file mode 100644 index 67d9d24ce7..0000000000 --- a/sysdeps/ieee754/ldbl-128ibm/e_sinhl.c +++ /dev/null @@ -1,79 +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. - * ==================================================== - */ - - -/* __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 <= 40 : sinh(x) := --------------, E=expm1(x) - * 2 - * - * 40 <= 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 long double one = 1.0, shuge = 1.0e307; - -long double -__ieee754_sinhl(long double x) -{ - long double t,w,h; - int64_t ix,jx; - double xhi; - - /* High word of |x|. */ - xhi = ldbl_high (x); - EXTRACT_WORDS64 (jx, xhi); - ix = jx&0x7fffffffffffffffLL; - - /* x is INF or NaN */ - if(ix>=0x7ff0000000000000LL) return x+x; - - h = 0.5; - if (jx<0) h = -h; - /* |x| in [0,40], return sign(x)*0.5*(E+E/(E+1))) */ - if (ix < 0x4044000000000000LL) { /* |x|<40 */ - if (ix<0x3c90000000000000LL) { /* |x|<2**-54 */ - math_check_force_underflow (x); - 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)); - w = t/(t+one); - return h*(t+w); - } - - /* |x| in [40, log(maxdouble)] return 0.5*exp(|x|) */ - if (ix < 0x40862e42fefa39efLL) return h*__ieee754_expl(fabsl(x)); - - /* |x| in [log(maxdouble), overflowthresold] */ - if (ix <= 0x408633ce8fb9f87eLL) { - w = __ieee754_expl(0.5*fabsl(x)); - t = h*w; - return t*w; - } - - /* |x| > overflowthresold, sinh(x) overflow */ - return x*shuge; -} -strong_alias (__ieee754_sinhl, __sinhl_finite) |