IND_REG
REG(index_reg_name), REG(data_reg_name), IND_REG(index), \
generic_read_indirect_reg(CTX, REG(index_reg_name), REG(data_reg_name), IND_REG(index))
IND_REG(index), \
REG(index_reg_name), REG(data_reg_name), IND_REG(index), \
IND_REG(index), \
IND_REG(index), \