C++ (Cpp) _ntl_ldexp Examples

Example #1

File: quad_float.c Project: Macaulay2/Singular

quad_float ldexp(const quad_float& x, long exp) { // x*2^exp
   double xhi, xlo;
   quad_float z;

   xhi = _ntl_ldexp(x.hi, exp);
   xlo = _ntl_ldexp(x.lo, exp);

   normalize(z, xhi, xlo);
   return z;
}

Example #2

File: xdouble.cpp Project: kenjinote/NTLSample

void power2(xdouble& z, long e)
{
   long hb = NTL_XD_HBOUND_LOG;
   long b = 2*hb;

   long q, r;

   q = e/b;
   r = e%b;

   while (r >= hb) {
      r -= b;
      q++;
   }

   while (r < -hb) {
      r += b;
      q--;
   }

   if (q >= NTL_OVFBND)
      ResourceError("xdouble: overflow");

   if (q <= -NTL_OVFBND)
      ResourceError("xdouble: underflow");

   double x = _ntl_ldexp(1.0, r);

   z.x = x;
   z.e = q;
}

Example #3

File: RR.c Project: 95krasovsky/SecretSharingSchemes

void conv(double& z, const RR& aa)
{
   double x;
   NTL_TLS_LOCAL(RR, a);

   ConvPrec(a, aa, NTL_DOUBLE_PRECISION);
   // round to NTL_DOUBLE_PRECISION bits to avoid double overflow

   conv(x, a.x);
   z = _ntl_ldexp(x, a.e);
}

Example #4

File: quad_float.cpp Project: tell/ntl-unix

void power2(quad_float& z, long e)
{
   z.hi = _ntl_ldexp(1.0, e);
   z.lo = 0;
}