1 // least_negative_float().
4 #include "base/cl_sysdep.h"
11 #include "float/cl_F.h"
12 #include "float/sfloat/cl_SF.h"
13 #include "float/ffloat/cl_FF.h"
14 #include "float/dfloat/cl_DF.h"
15 #include "float/lfloat/cl_LF.h"
16 #include "float/lfloat/cl_LF_impl.h"
20 static inline const cl_LF least_negative_LF (uintC len)
22 var Lfloat erg = allocate_lfloat(len,LF_exp_low,-1);
23 #if CL_DS_BIG_ENDIAN_P
24 TheLfloat(erg)->data[0] = bit(intDsize-1);
25 clear_loop_up(&TheLfloat(erg)->data[1],len-1);
27 var uintD* ptr = clear_loop_up(&TheLfloat(erg)->data[0],len-1);
28 *ptr = bit(intDsize-1);
33 const cl_F least_negative_float (float_format_t f)
35 // Exponent so klein wie möglich, Mantisse 10...0, Vorzeichen -.
37 static const cl_SF least_negative_SF =
38 make_SF(-1,SF_exp_low,bit(SF_mant_len));
40 static const cl_FF least_negative_FF =
41 encode_FF(-1,FF_exp_low-FF_exp_mid,bit(FF_mant_len));
43 static const cl_DF least_negative_DF =
44 #if (cl_word_size==64)
45 encode_DF(-1,DF_exp_low-DF_exp_mid,bit(DF_mant_len));
47 encode_DF(-1,DF_exp_low-DF_exp_mid,bit(DF_mant_len-32),0);
50 floatformatcase((uintC)f
51 , return least_negative_SF;
52 , return least_negative_FF;
53 , return least_negative_DF;
54 , return least_negative_LF(len);