em400: fp: Z/M flag, UF/OV int fixed
em400: fp tests
em400: fp: denormalized 0 doesn't set div0 int
em400: fp tests: denormalized 0 doesn't set DIV0 int
em400: fp: denormalization check fixed for negative m
em400: fp tests contd.
em400: fp tests contd.
em400: fp: clear M/Z flags when not M/Z, doh
em400: fp tests contd.