swreg_to_unrestricted
err = swreg_to_unrestricted(reg_none(), base, reg_imm(0), ®);
err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®);
err = swreg_to_unrestricted(dst, lreg, rreg, ®);
err = swreg_to_unrestricted(lreg, reg_none(), rreg, ®);
err = swreg_to_unrestricted(reg_none(), lreg, rreg, ®);
err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®);
err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®);
int swreg_to_unrestricted(swreg dst, swreg lreg, swreg rreg,