Register calling convention for asm functions...
Mikola Lysenko
mclysenk at mtu.edu
Mon Mar 12 14:52:36 PDT 2007
Chris Warwick wrote:
> What do i need to do to get register calling convention for asm? I've found
> extern(C) for cdecl calling convention, and i have seen mention of the
> 'naked' keyword but cant work out where it goes... im not even sure if it
> does cause register calling convention or just causes the compiler to omit
> entry and exit code.
>
> I assume it must be possible to write asm functions that take arguments in
> the eax,ecx,edx registers?
>
> thanks,
>
> cw
>
>
Yes, and no. The D calling convention differs from compiler to
compiler. GDC uses an extension of extern(C), while DMD follows a
convention similar to Win32's stdcall. As a result, this makes it a bad
idea to use 'naked' within a D function.
Hope this helps.
-Mik
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