能够实现定点小数的机器数表示、定点小数的变形补码加减运算、定点小数的原码一位乘法运算和浮点数的加减运算。-Able to achieve fixed-point decimal number of machines that the deformation of complement fixed-point decimal addition and subtraction operations, the original code a fixed-point decimal multiplication and floating-point operations of addition and subtraction.