<div>
Well I read through the VC docs again on calling conventions and didn't find any help one way or another. I also followed a few threads on thiscall and assembly but didn't learn anything of value. I checked google again but also found nothing. I suppose the best is just be safe and save the value of ecx on the stack and restore it after.<br />
<br />
thanks,<br />
-Sandra
</div>


Well I read through the VC docs again on calling conventions and didn't find any help one way or another. I also followed a few threads on thiscall and assembly but didn't learn anything of value. I checked google again but also found nothing. I suppose the best is just be safe and save the value of ecx on the stack and restore it after.

thanks,
-Sandra

<div>
<div class="content wysiwyg-content">
Just a quick question, if you code a member function in assembler, the this pointer is passed as ecx.<br />
<br />
Can you use ecx then without the need to save it to the stack and restore it when your finished? <br />
<br />
Or will the compiler assume that since it already put the this pointer into ecx, it can skip that on the next member function call.<br />
<br />
Is there any way to tell? I looked at the disassembly but didn't see anything conclusive one way or the other.<br />
<br />
thanks,<br />
-Sandra
</div>
</div>


Just a quick question, if you code a member function in assembler, the this pointer is passed as ecx.

Can you use ecx then without the need to save it to the stack and restore it when your finished? 

Or will the compiler assume that since it already put the this pointer into ecx, it can skip that on the next member function call.

Is there any way to tell? I looked at the disassembly but didn't see anything conclusive one way or the other.

thanks,
-Sandra

thiscall

An assembly language (or assembler language) is a low-level programming language for a computer or other programmable device in which there is a very strong (generally one-to-one) correspondence between the language and the architecture's machine code instructions. Each assembly language is specific to a particular computer architecture, in contrast to most high-level programming languages, which are generally portable across multiple architectures, but require interpreting or compiling. Assembly language is converted into executable machine code by a utility program referred to as an assembler; the conversion process is referred to as assembly, or assembling the code.