src/math/sinhl.c

   1 #include "libm.h"
   2
   3 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
   4 long double sinhl(long double x)
   5 {
   6         return sinh(x);
   7 }
   8 #elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
   9 long double sinhl(long double x)
  10 {
  11         union ldshape u = {x};
  12         unsigned ex = u.i.se & 0x7fff;
  13         long double h, t, absx;
  14
  15         h = 0.5;
  16         if (u.i.se & 0x8000)
  17                 h = -h;
  18         /* |x| */
  19         u.i.se = ex;
  20         absx = u.f;
  21
  22         /* |x| < log(LDBL_MAX) */
  23         if (ex < 0x3fff+13 || (ex == 0x3fff+13 && u.i.m>>32 < 0xb17217f7)) {
  24                 t = expm1l(absx);
  25                 if (ex < 0x3fff) {
  26                         if (ex < 0x3fff-32)
  27                                 return x;
  28                         return h*(2*t - t*t/(1+t));
  29                 }
  30                 return h*(t + t/(t+1));
  31         }
  32
  33         /* |x| > log(LDBL_MAX) or nan */
  34         t = expl(0.5*absx);
  35         return h*t*t;
  36 }
  37 #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
  38 // TODO: broken implementation to make things compile
  39 long double sinhl(long double x)
  40 {
  41         return sinh(x);
  42 }
  43 #endif