Difference between revisions of "Assembler:Commands:DEC"

From Cheat Engine
Jump to navigation Jump to search
Line 18: Line 18:
 
use a [[Assembler:Commands:SUB|SUB]] instruction with an immediate operand of 1.)
 
use a [[Assembler:Commands:SUB|SUB]] instruction with an immediate operand of 1.)
  
[http://x86.renejeschke.de/html/file_module_x86_id_71.html x86.renejeschke.de/html/file_module_x86_id_71.html]
 
 
</div>
 
</div>
  
Line 49: Line 48:
 
{{AssemblerCommandSeeAlso}}
 
{{AssemblerCommandSeeAlso}}
  
== External links ==
+
{{Template:AssemblerCommandExternalLinks}}
* [https://wikipedia.org/wiki/X86_instruction_listings wikipedia.org/wiki/X86_instruction_listings]
 
* [https://wikibooks.org/wiki/X86_Assembly/Other_Instructions wikibooks.org/wiki/X86_Assembly/Other_Instructions]
 
* [http://x86.renejeschke.de/ x86.renejeschke.de]
 
* [http://www.asmpedia.org/index.php?title=Main_Page asmpedia.org]
 
* [http://ref.x86asm.net/ ref.x86asm.net]
 

Revision as of 15:16, 3 January 2018

command dec operand

Decreases the operand by one.


The CF flag is not affected. The OF, SF, ZF, AF, and PF flags are set according to the result.

operand = operand - 1


Subtracts 1 from the operand, while preserving the state of the CF flag. The operand can be a register or a memory location. This instruction allows a loop counter to be updated without disturbing the CF flag. (To perform a decrement operation that updates the CF flag, use a SUB instruction with an immediate operand of 1.)


Command Parameters

Parameter Description
operand The destination operand


Examples

dec al
dec ax
dec eax
dec rax
dec [00123ABC]
dec [rax]
dec [SomeSymbol]

See also

External links