src/math/frexpl.c

   1 #include "libm.h"
   2
   3 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
   4 long double frexpl(long double x, int *e)
   5 {
   6         return frexp(x, e);
   7 }
   8 #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
   9 long double frexpl(long double x, int *e)
  10 {
  11         union ldshape u = {x};
  12         int ee = u.i.se & 0x7fff;
  13
  14         if (!ee) {
  15                 if (x) {
  16                         x = frexpl(x*0x1p120, e);
  17                         *e -= 120;
  18                 } else *e = 0;
  19                 return x;
  20         } else if (ee == 0x7fff) {
  21                 return x;
  22         }
  23
  24         *e = ee - 0x3ffe;
  25         u.i.se &= 0x8000;
  26         u.i.se |= 0x3ffe;
  27         return u.f;
  28 }
  29 #endif