Assembler:Commands:DEC - Revision history

TheyCallMeTim13 at 15:42, 3 January 2018

2018-01-03T15:42:59Z

TheyCallMeTim13 at 15:16, 3 January 2018

2018-01-03T15:16:59Z

TheyCallMeTim13 at 22:08, 19 March 2017

2017-03-19T22:08:05Z

TheyCallMeTim13 at 11:23, 19 March 2017

2017-03-19T11:23:28Z

TheyCallMeTim13 at 04:28, 15 March 2017

2017-03-15T04:28:32Z

TheyCallMeTim13 at 04:10, 15 March 2017

2017-03-15T04:10:07Z

TheyCallMeTim13 at 07:49, 14 March 2017

2017-03-14T07:49:04Z

TheyCallMeTim13: Created page with ''''command''' dec ''operand'' Decreases the operand by one. Subtracts 1 from the operand, while preserving the state of the '''CF''' flag. The operand can be a register or a m…'

2017-03-13T19:34:22Z

Created page with ''''command''' dec ''operand'' Decreases the operand by one. Subtracts 1 from the operand, while preserving the state of the '''CF''' flag. The operand can be a register or a m…'

New page

'''command''' dec ''operand''

Decreases the operand by one.

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 [[Assembler:Commands:SUB|SUB]] instruction with an immediate operand of 1.)

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

operand = operand - 1

=== Command Parameters ===
{|width="85%" cellpadding="10%" cellpadding="5%" cellspacing="0" border="0"
!align="left"|Parameter
!style="width: 80%;background-color:white;" align="left"|Description
|-
|operand
|The destination operand
|}

== Examples ==
dec al

dec ax

dec eax

dec rax

dec [00123ABC]

dec [rax]

dec [SomeSymbol]

== See also ==
* [[Assembler]]
* [[Cheat_Engine:Auto Assembler|Auto Assembler]]
* [[Assembler:Commands|Assembler Commands]]

== External links ==
* [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://www.asmpedia.org/index.php?title=Main_Page asmpedia.org]
* [http://x86.renejeschke.de/html/file_module_x86_id_71.html x86.renejeschke.de/html/file_module_x86_id_71.html]

← Older revision		Revision as of 15:42, 3 January 2018
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://c9x.me/x86/html/file_module_x86_id_71.html c9x.me/x86/html/file_module_x86_id_71.html]
	</div>		</div>

@@ Line 18: / Line 18: @@
 use a [[Assembler:Commands:SUB|SUB]] instruction with an immediate operand of 1.)
 </div>
@@ Line 49: / Line 48: @@
 {{AssemblerCommandSeeAlso}}
-== External links ==
+{{Template:AssemblerCommandExternalLinks}}

← Older revision		Revision as of 11:23, 19 March 2017
Line 1:		Line 1:
		+	[[Category:Assembler]]
	'''command''' dec ''operand''		'''command''' dec ''operand''

← Older revision		Revision as of 04:28, 15 March 2017
Line 56:		Line 56:
	* [http://x86.renejeschke.de/ x86.renejeschke.de]		* [http://x86.renejeschke.de/ x86.renejeschke.de]
	* [http://www.asmpedia.org/index.php?title=Main_Page asmpedia.org]		* [http://www.asmpedia.org/index.php?title=Main_Page asmpedia.org]
		+	* [http://ref.x86asm.net/ ref.x86asm.net]

@@ Line 47: / Line 47: @@
   dec [SomeSymbol]
-== See also ==
+{{AssemblerCommandSeeAlso}}
 == External links ==

@@ Line 54: / Line 54: @@
 * [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://www.asmpedia.org/index.php?title=Main_Page asmpedia.org]

@@ Line 3: / Line 3: @@
 Decreases the operand by one.
 Subtracts 1 from the operand, while preserving the state of the '''CF''' flag.
 The operand can be a register or a memory location.
@@ Line 9: / Line 17: @@
 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]
-The '''CF''' flag is not affected. The '''OF''', '''SF''', '''ZF''', '''AF''',
+</div>
@@ Line 40: / Line 45: @@
   dec [SomeSymbol]
 == See also ==
@@ Line 51: / Line 55: @@
 * [https://wikibooks.org/wiki/X86_Assembly/Other_Instructions wikibooks.org/wiki/X86_Assembly/Other_Instructions]
 * [http://www.asmpedia.org/index.php?title=Main_Page asmpedia.org]