Computer architectures
[CS] Number of Operands
YEJI ⍢
2022. 9. 19. 17:40
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Three Operands
Add A, B C
Destination - A
Sources - B and C
(A ← B + C)
| Opcode | Oprand #1 | Operand #2 | Operand #3 |
Two Operands
Add A, B
Destination - A
Sources - A and B
(A ← B + C)
| Opcode | Operand #1 | Operand #2 |
One Operands
(Assume a special registerm accumulator to hold data value)
ADD A
Destination - AC (accumulator)
Sources: A and AC
(AC ← AC + A)
LD A
(Load store)
Destination - AC
Source - A
(AC ← A)
| Opcode | Operand |
Zero operand
(Assume a Stack)
PUSH A
PUSH B
ADD (TOS ← A + B)
POP c (c ← TOS)
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