use __expo2 in sinh and cosh, move __cexp to cmath

[libm] / src / cmath / cproj.c

#include "libm.h"

double complex cproj(double complex z)
{
        if (isinf(creal(z)) || isinf(cimag(z)))
                return cpack(INFINITY, copysign(0.0, creal(z)));
        return z;
}