idf
#define test_x509_verify_param_copy_id(idf, def) \
test_x509_verify_param_copy(id->idf, def)
u8 tvco, tpcp, tpd, tlpf, idf;
ch7xxx_readb(dvo, CH7xxx_IDF, &idf);
idf &= ~(CH7xxx_IDF_HSP | CH7xxx_IDF_VSP);
idf |= CH7xxx_IDF_HSP;
idf |= CH7xxx_IDF_VSP;
ch7xxx_writeb(dvo, CH7xxx_IDF, idf);
testf(idf(nextafterf(FLT_MAX, INFINITY)), INFINITY, ex_over);
testf(idf(nextafterf(INFINITY, 0.0)), FLT_MAX, 0);
testf(idf(nexttowardf(FLT_MAX, FLT_MAX * 2.0)), INFINITY, ex_over);
testf(idf(nexttowardf(INFINITY, FLT_MAX * 2.0)), FLT_MAX, 0);
static float idf(float);