sar - Assembly sarl and idivl - interpreting -


I have a problem understanding the following assembly code. It would be great if you can give me an example with numbers That's how it looks behind the scenes. 

  movl $ 0,% ecx movl $ 0,% ex addl $ 1,% ex movl% eax,% $ 31,% edx idivl $ 7 movl% edx,% eax movl (% Esp,% eax, 4),% eax movl% eax, (% esp,% ecx, 4)   
 I think that I can not interpret serial and move because My result does not make sense ..  
 Thank you very much for your help !! I am sitting in front of that code for 3 hours; ^^  
 I think:  
 ecx = 0  
 eax = 0  
 eax = 0 + 1 = 1  
 edx = eax = 1  
 now ADX Transfer = & gt; Adx = 0  
 Now edx: eax is divided by 7?  
 Why can not I just set up AdX = 0 and leave Ciral? Will not this happen?   
 
 
 
 I just  edx  = 0 and leave  sarl  outside? Will not it be like this?   
 Not for a signed partition, which is  ivive  are following two instructions that  CDQ  does the instructions:    movl% eax,% edx sarl $ 31,% edx   
 is it,  
 " sar  operated is positive and operator is negative if the setting of empty bits keeps the signal of Source Operation clear by clearing the empty bit posts. " 
 and  
 
 " CDQ  dictates a double-value mark in the  EAX  register in each bit position (bit 31) The  CDQ  command can be used to create a quadruped dividend from a double before the double division. "   / Blockquote> 
 Note that  sarl  updates some status flag while the  cdq  does not, this New is  movl  +  sarl  as that would not be the same  cdq . It is not clear from the question why the code does not use only  cdq .

Comments

Post a Comment

Popular posts from this blog

Verilog Error: output or inout port "Q" must be connected to a structural net expression -

I get the error every time, I try to compile. I'm not sure why anyone can help is? I'm new to verilog. Module D_FF (clerk, d, reset_n, q); Input D, Clack, reset_en; Output Q; reg Q; lab4_gdl f1 (.lk (~ clk), d (d), .q.m (qm)); lab4_GDL f2 (.Clk (Clk), D (QM), .Q (Q)); Always start at @ (posedge clk, neggeous reset_n) (Reset_n == 0) Q & lt; = 0; Other questions & lt; = D; Edit End: The problem is what we are asking to do: In this section, you apply the memory / registration circuit on the AlterEdie 2 board. will do. The circuit has the following specifications: The present value of swift SW15-0 on the D2 board should be shown in four hexadecimal four sections of HEX3-0. This part of the circuit will be combination logic. To use an active-less asynchronous reset and KEY1 to use KEY0 as the clock input, you must store SW15-0in in a 16-bit register in the value The register should be enabled to have a 16-bit positive edge, which uses the embedded D flip-flo...
Read more

Installing croogo for cakephp -

I'm new to the keyboard, I want to install Crogo in KKPP 2.3. My question: The way to extract the file is: - Changing cakephp2.3 / app / plugging / folder in app (do not work. Error admin controller not found) or - CakePP-2.3.3 / app / (Not working ). Sorry for my bad english language: (please help me and thank you.) crogo a cms by kcfp has been developed ... meaning kkfp is already there .. just Croogo Download and read their documentation ... and try Google about some CMS ...
Read more

c# - ASP.NET MVC - Attaching an entity of type 'MODELNAME' failed because another entity of the same type already has the same primary key value -

In brief, the wrapper module is inserted during posting and the status of an entry is changed to 'modified' . Before changing the state, the state is set to 'separate', but calling attachments () causes the same error to be thrown away. I am using EF 6. Model / wrapper class public class avi model {public A is a {get; Set; } Public listing & lt; B & gt; B {received; Set; } Public cc {receipt; Set; }} Administrator edit public functioning (int? id) {if (id == null) {new HttpStatusCodeResult (HttpStatusCode.BadRequest); } If (! Conveyor Access (id.Value)) new HTTPTitus code result (HTTP status code. Forbidden); Var aViewModel = new AViewModel (); aViewModel.A = db.As.Find (id); If (aViewModel.Receipt == zero) {return HttpNotFound (); } aViewModel.b = db.Bs.Where (x => x.aid == id.Value) .Oolist (); AViewModel.Vendor = db.Cs.Where (x => x.cid == aViewModel.a.cID) .FirstOrDefault (); See Return (aViewModel); } [HTPFost] [Valid AntitiferousTeacon...
Read more