csqrtf
float complex csqrtf(float complex);
PROTO_NORMAL(csqrtf);
w = clogf(z + csqrtf(z + 1) * csqrtf(z - 1));
z2 = csqrtf (zz);
DEF_STD(csqrtf);
ATF_TC_WITHOUT_HEAD(csqrtf);
ATF_TC_BODY(csqrtf, tc)
ATF_TP_ADD_TC(tp, csqrtf);
return (csqrtf((float complex)d));