Test al,al

[remus2k]

Hello

I was a very long time not here and coing in the last time again with assembly.

Can any tell me how i can change this in If else statement

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      mov esi,[String]
@@:
      mov al,[esi]
       inc esi
     test al,al
        jz  @F
       jnz @B
@@:

I know it a little code, myquestion is only how it in if else statment
I have a long time not coding in asm asm ::)

Thanks

[jj2007]

Hello

I was a very long time not here and coing in the last time again with assembly.

Can any tell me how i can change this in If else statement

Code Select Expand


      mov esi,[String]
@@:
      mov al,[esi]
       inc esi
     test al,al
        jz  @F
       jnz @B
@@:

I know it a little code, myquestion is only how it in if else statment
I have a long time not coding in asm asm ::)

Thanks

You can use the Zero? operator:

Code Select Expand


      mov esi,[String]
      .Repeat
          mov al, [esi]
          inc esi
          test al, al
      .Until Zero?


[remus2k]

Thanks for your fast reply

And by "test al,al" If this "if al != 0 goto @Out" ?

Then can could write so?

Code Select Expand



      mov esi,[String]

          mov al, [esi]
          inc esi
          ;test al, al
         .if al != 0
           jmp @Out
         .endif



Or is this not correct?

[jj2007]

You could integrate the test al, al like this:

Code Select Expand

      mov esi,[String]
      .Repeat
          mov al, [esi]
          inc esi
      .Until !al

[hutch--]

remus2k,

If you want to keep the code simple you can use the .IF form,

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  .if al == 0
    jmp outlabel
  .endif


You can do it better though.

Code Select Expand


    test al, al
    jnz earlier_label


To do it better again, try this.

Code Select Expand


    movzx eax, BYTE PTR [esi]  ; zero extend byte in ESI into EAX
    test eax, eax
    jnz earlier_label


[remus2k]

Ok now have i this understand
Thanks :U