exp2f
float exp2f(float);
ATF_TC_WITHOUT_HEAD(exp2f);
ATF_TC_BODY(exp2f, tc)
ATF_CHECK_EQ(exp2f(i), ldexpf(1.0, i));
ATF_TP_ADD_TC(tp, exp2f);
test(exp2f, x, result, exceptmask, excepts); \