Hello! I have a question , How to complement a number that is in a register by u

Question

Hello! I have a question , How to complement a number that is in a register by using assembly language . Also, I do not know the opcode for negation . Then, add to it 1 to be 2's complement and store it in another register ? Using Armsim !
I hope you understand !
Thank you Hello! I have a question , How to complement a number that is in a register by using assembly language . Also, I do not know the opcode for negation . Then, add to it 1 to be 2's complement and store it in another register ? Using Armsim !
I hope you understand !
Thank you I have a question , How to complement a number that is in a register by using assembly language . Also, I do not know the opcode for negation . Then, add to it 1 to be 2's complement and store it in another register ? Using Armsim !
I hope you understand !
Thank you

Explanation / Answer

MVN X1, X2 // X1,X2 are Registers. Negate the value

ADD X1, X1 #1 // add +1 to the register

Begin:
mov ax, data
mov ds, ax
mov es, ax
mov ah, 0000h
mov a1, num
NOT a1
mov b1, a1
adc a1, 00000001B
mov b1, a1
Exit:
  

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