What is a three address instruction?
Three-address instruction is a format of machine instruction. It has one opcode and three address fields. One address field is used for destination and two address fields for source. Example: X = (A + B) x (C + D)
What are address instructions?
One Address Instructions – This use a implied ACCUMULATOR register for data manipulation. One operand is in accumulator and other is in register or memory location. Implied means that the CPU already know that one operand is in accumulator so there is no need to specify it.
What are the types of address instruction?
Here destination address can also contain operand. This has three address field to specify a register or a memory location. Program created are much short in size but number of bits per instruction increase….Zero Address Instructions –
|PUSH||A||TOP = A|
|PUSH||D||TOP = D|
|ADD||TOP = C+D|
|MUL||TOP = (C+D)*(A+B)|
|POP||X||M[X] = TOP|
What are the various types of three address statements?
The three address code can be represented in two forms: quadruples and triples.
What are two address instructions?
Two-address instruction is a format of machine instruction. It has one opcode and two address fields. One address field is common and can be used for either destination or source and other address field for source.
What is 3 byte instruction in microprocessor?
Three-byte instruction is the type of instruction in which the first 8 bits indicates the opcode and the next two bytes specify the 16-bit address. The low-order address is represented in second byte and the high-order address is represented in the third byte.
How many types of instructions are there?
A basic computer has three instruction code formats which are: Memory – reference instruction. Register – reference instruction. Input-Output instruction.
What are the three-address code representations?
Why it is called 3 address code?
The reason for the term three-address code is that each statement usually contain three addresses, two for the operands and one for the result.