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adroit



Joined: 21 Feb 2010
Posts: 252
adroit
When adding in assembly, are the following similar:
Code:
mov ah,4
mov al,5
add ah,al

; is it the same as?:
mov ah,[ah+al]    

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meshnix
Post 03 Jun 2010, 16:09
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edemko



Joined: 18 Jul 2009
Posts: 549
edemko
2nd looks to be wrong at all so it is not the same, what exactly do you want
Post 03 Jun 2010, 16:12
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
Code:
mov bx, 4
mov si, 5
add bx, si

; Is the same as:
lea bx, [bx+si]    
Post 03 Jun 2010, 16:17
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17716
Location: In your JS exploiting you and your system
revolution
LocoDelAssembly wrote:
Code:
mov bx, 4
mov si, 5
add bx, si

; Is the same as:
lea bx, [bx+si]    
Is the same ... except for the EFLAGS register.
Post 03 Jun 2010, 16:23
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edemko



Joined: 18 Jul 2009
Posts: 549
edemko
revolution
Is the same ... except for the EFLAGS register.
it's out off the topic, revolutio, still: have you been working with Eflags?
why not flags:) eg. time before i thought Eflags was present only, then found flags and Rflags :)
Post 03 Jun 2010, 16:29
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adroit



Joined: 21 Feb 2010
Posts: 252
adroit
edemko wrote:
2nd looks to be wrong at all so it is not the same, what exactly do you want

Yea, I tried to compile; it didn't work. I just want to know if the add mnemonic (example: mov ah,8 / add ah,8) is the same as using + operator (example: mov ah,[9+6].
LocoDelAssembly wrote:
Code:
mov bx, 4 
mov si, 5 
add bx, si 

; Is the same as: 
lea bx, [bx+si]    


lea loads the actual memory location (calculation) of bx+si, right?
Post 03 Jun 2010, 16:46
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edemko



Joined: 18 Jul 2009
Posts: 549
edemko
Post 03 Jun 2010, 16:56
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adroit



Joined: 21 Feb 2010
Posts: 252
adroit
Yea, I should read a few chapters before making a fool of myself Laughing
Post 03 Jun 2010, 16:58
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