Question

1- please fill the blank

a) in the long format floating point representation: pentium gives....... bits for exponent and.......bits for mantissa.

b) give an example of test-and-jump instruction in assembly:..........

Answer 1

Answer:

A. in the long format floating point representation: pentium gives 6bits bits for exponent and 10bits bits for mantissa.

• in the binary floting point number the first 10bits are Mantissa and the last 6bits are exponent.

​​​​​​​​​​​​​​B. There are many instructions in assembly works based on test and jump. And there are unconditional instructions also which do not check any value but jumps.

Example:

CMP AL,BL

JE X

X:.....

Explanation:

cmp al , bl means it will compare both al and bl values. Then the value will be store in program status word. JE X means jump on equl. i.e, if both are equal then it will jump to X. X is a label here.

So JE X is a test- and-jump instruction here.