Output of Instruction ADD BX, AX

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Hello Friends,
This is a quick question.
I want to know that where will be the result of the operation

ASM

ADD BX, AX

Stores in?
Is it AX or BX?
This confusion arises since we have instruction

ASM

ADD AX, BX

which stores the result in AX. I thought, where will be the result store when we interchange the two operands AX and BX?

Please Answer this query if you know the answer with reason.
Thank you.

Regards
Tushar Srivastava

Posted 15-Sep-12 4:14am

Er. Tushar Srivastava

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Comments

Er. Tushar Srivastava 15-Sep-12 10:40am

Thank you both :-)

3 solutions

Solution 3

ADD AX,BX

add value in bx to value in ax (result in ax)

Posted 15-Sep-12 4:58am

ridoy

Updated 15-Sep-12 5:00am

v2

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OriginalGriff · Accepted Answer · 2012-09-15T04:32:00

Solution 1

BX
The destination is always on the left.

The syntax of ADD is:

add <destreg>,<reg>
add <destreg>,<mem>
add <destmem>,<reg>
add <destreg>,<con>
add <destmem>,<con>

And the destination always comes first.

Posted 15-Sep-12 4:32am

OriginalGriff

Comments

Mehdi Gholam 15-Sep-12 10:36am

5'ed, just posted the same.

OriginalGriff 15-Sep-12 10:55am

Great minds and all that!

Mehdi Gholam · Accepted Answer · 2012-09-15T04:34:00

Solution 2

Read this lecture : http://opencourseware.kfupm.edu.sa/colleges/ces/ee/ee390/files%5C3-Handouts_Lecture_6.pdf[^]

Posted 15-Sep-12 4:34am

Mehdi Gholam

Output of Instruction ADD BX, AX

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Output of Instruction ADD BX, AX

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