Question

Must use AT&T x64/GNU Assembly syntax.

Write an assembly language program that reads in two integers, A and B, and uses them to compute the following expressions. You must use the same values for A and B throughout all three expressions.

1) A * 5

2) (A + B) - (A / B)

3) (A - B) + (A * B)

Answer 1

The given first expression is:

1) A*5

Let X=A*5

Therfore, GNU Assembly syntax for the above expession can be written as:

MOV(A, eax);

MUL(5, eax:edx);

Mov(edx, X);

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The given second expression is:

2) (A+B)-(A/B)

Let X: (A+B)-(A/B)

Therfore, GNU Assembly syntax for the above expession can be written as:

MOV(A, eax);

ADD(B, eax);

MOV(eax, Temp1);

MOV(A, eax);

DIV(B, eax);

MOV(eax, Temp2);

MOV(Temp1, eax);

SUB(Temp2, eax);

MOV(eax, x);

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The given third expression is:

3) (A-B)+(A*B)

Let X: (A-B)+(A*B)

Therfore, GNU Assembly syntax for the above expession can be written as:

MOV(A, eax);

SUB(B, eax);

MOV(eax, Temp1);

MOV(A,eax);

MUL(B, eax);

MOV(eax, Temp2);

MOV(Temp1, eax);

ADD(Temp2, eax);

MOV(eax, x)

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Here, we have assigned 32 bit signed integer value to register eax in all the expressions.