3- Address Instruction Form
Assignment Instruction of the form
X = a op b
Where op is a binary operator such as arithmetic, logical, relational, and bitwise operators.
Ex: x = a+b
x = a>b
x = a&&b
Assignment instruction of the form
X = op a
Where op is unary operator such as unary minus, increment, decrement, and logical not
Ex: x = -a
X = a —
X = ! a
Copy instruction of the form
X = y
Where y value is assigned to u
Ex: goto L
Where L represents a set of statements.
A conditional jump of the form if u relational op u goto L and conditional jump of the form if x goto L1 else goto L2.
Ex: ij x> y goto L1
Ij x then goto L1
Else
Goto L2
Procedure calls and returns are implemented using the following format.
Procedure: X
y=call(p,x)
Return y
Address and pointer assignments of the form
X = &y
X = *y
Y = *x
Index copy instructions of the form x=y[i], x[i]=y
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