1#include "complex_impl.h"
 2
 3float complex cacoshf(float complex z)
 4{
 5	int zineg = signbit(cimagf(z));
 6
 7	z = cacosf(z);
 8	if (zineg) return CMPLXF(cimagf(z), -crealf(z));
 9	else       return CMPLXF(-cimagf(z), crealf(z));
10}