*** 43,54 ****
  #elif defined(__x86)
  int
  isnanl(long double x) {
          int *px = (int *) &x, t = px[2] & 0x7fff;
  #if defined(HANDLE_UNSUPPORTED)
!         return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0 ||
!                 t != 0 && (px[1] & 0x80000000) == 0);
  #else
          return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0);
  #endif
  }
  #endif  /* defined(__sparc) || defined(__x86) */
--- 43,54 ----
  #elif defined(__x86)
  int
  isnanl(long double x) {
          int *px = (int *) &x, t = px[2] & 0x7fff;
  #if defined(HANDLE_UNSUPPORTED)
!         return ((t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0) ||
!                 (t != 0 && (px[1] & 0x80000000) == 0));
  #else
          return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0);
  #endif
  }
  #endif  /* defined(__sparc) || defined(__x86) */