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[cln.git] / src / float / transcendental / cl_F_roundpi.cc
1 // cl_round_pi().
2
3 // General includes.
4 #include "cl_sysdep.h"
5
6 // Specification.
7 #include "cl_F_tran.h"
8
9
10 // Implementation.
11
12 const cl_F_div_t cl_round_pi (const cl_F& x)
13 {
14         if (float_exponent(x) <= 0)
15                 // Exponent <=0 -> |x|<1 -> |x/pi| < 1/2, also Division unnötig
16                 return cl_F_div_t(0,x); // Quotient 0, Rest x
17         else
18                 // x durch pi (mit hinreichender Genauigkeit) dividieren
19                 return round2(x,cl_pi(x));
20 }