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// cl_DF_to_LF().
// General includes.
#include "cl_sysdep.h"
// Specification.
#include "cl_F.h"
// Implementation.
#include "cl_DF.h"
#include "cl_LF.h"
#include "cl_LF_impl.h"
#include "cl_DS.h"
namespace cln {
const cl_LF cl_DF_to_LF (const cl_DF& x, uintC len)
{
// x entpacken:
var cl_signean sign;
var sintL exp;
#if (cl_word_size==64)
var uint64 mant;
DF_decode(x, { return encode_LF0(len); }, sign=,exp=(sintL),mant=);
#else
var uint32 manthi;
var uint32 mantlo;
DF_decode2(x, { return encode_LF0(len); }, sign=,exp=(sintL),manthi=,mantlo=);
#endif
// Long-Float allozieren,
// Mantisse mit intDsize*len-DF_mant_len-1 Nullbits auffüllen:
var Lfloat y = allocate_lfloat(len,exp+LF_exp_mid,sign);
var uintD* ptr = arrayMSDptr(TheLfloat(y)->data,len);
// erste k := ceiling(DF_mant_len+1,intDsize) Digits mit mant füllen:
var const int shiftcount = (ceiling(DF_mant_len+1,intDsize)*intDsize-(DF_mant_len+1));
#if (cl_word_size==64)
mant = mant<<shiftcount;
set_max64_Dptr(DF_mant_len+1,ptr,mant);
#else
manthi = (manthi<<shiftcount) | (mantlo>>(32-shiftcount));
mantlo = mantlo<<shiftcount;
set_max32_Dptr(DF_mant_len+1-32,ptr,manthi);
set_32_Dptr(ptr mspop ceiling(DF_mant_len+1-32,intDsize),mantlo);
#endif
clear_loop_msp(ptr mspop ceiling(DF_mant_len+1,intDsize),len-ceiling(DF_mant_len+1,intDsize));
return y;
}
} // namespace cln