Chapter 9, Problem 7E

Explanation of Solution

Explanation:

The total number of registers present in the Central Processing Unit (CPU) is 186.

The number of global registers for different functions is 18.

The number of local registers for different functions is 10.

The number of register windows is 12.

The number of input parameter registers is 6.

The number of output parameter registers is 6.

The total number of local registers can be calculated using the following formula,

$\text{Total}\text{number}\text{of}\text{local}\text{registers}\text{=}\text{Number}\text{of}\text{local}\text{registers}\text{in}\text{each}\text{window}\text{×}\text{Number}\text{of}\text{windows}$

Substitute, “10” for “number of local registers in each window” and “12” for “number of windows” in the above formula,

$\begin{array}{c}\text{Total}\text{number}\text{of}\text{local}\text{registers}\text{=}10\text{×}\text{12}\\ \text{=}12\text{0}\end{array}$

Thus, the total number of local registers is 120.

The total number of input/output registers can be calculated using the following formula,

$\begin{array}{c}\text{Total}\text{number}\text{of}\text{input/output}\text{registers}\text{=}\text{(total}\text{registers}-\text{(global}\text{registers}\text{+}\\ \text{(register}\text{windows}\end{array}$