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CMP (CoMPare) (word)
<Operation>
Rd – Rs; set condition code
<Assembly-Language Format>
CMP.W Rs, Rd
<Examples>
CMP.W R5, R6
<Operand Size>
Word
<Description>
This instruction subtracts a source register from a destination register and sets the condition
code flags according to the result. The destination register is not altered.
<Instruction Formats>
Addressing
mode
Register direct
Mnem.
Operands
CMP.W
Rs, Rd
<Condition Code>
I
— —
I: Previous value remains unchanged.
H: Set to "1" when there is a borrow from
bit 11; otherwise cleared to "0."
N: Set to "1" when the result is negative;
otherwise cleared to "0."
Z: Set to "1" when the result is zero;
otherwise cleared to "0."
V: Set to "1" if an overflow occurs;
otherwise cleared to "0."
C: Set to "1" if there is a borrow from bit
15; otherwise cleared to "0."
Instruction code
1st byte
2nd byte
0 rs 0 rd
1
D
68
H
N
Z
—
3rd byte
4th byte
CMP
V
C
No. of
states
2
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