inline asm bug

[Simen Kjaeraas]

Blas Rodriguez Somoza <blas at puertareal.com> wrote:

> Hello
>
> I've found something that seems to a bug working with the inline  
> assembler, but I'm not sure if it is the expected behavoir.
>
> The reference to struct/unions don't work if there is nested  
> structs/unions defined separately. Example:
>
> union test {
> 	ulong var1;
> 	struct var2 {
> 		ubyte zz;
> 	}
> }
>
> union test2 {
> 	ulong var1;
> 	pp var2;	
> }
>
> struct pp {
> 	ubyte zz;
> }
>
> ..
> ..
> asm{
> 	..
> 	movzx EAX, test.var2.zz[ESI];
> 	movzx EAX, test2.var2.zz[ESI];
> 	..
> }
>
> The first line succeed but the second fails:
>
> Error: need 'this' for address of var2
> Error: need 'this' for address of var2
> bad type/size of operands '*(& var2)'
>
> When, by error, I change the second line to
>
> 	movzx EAX, test2.var2->zz[ESI];
>
> the compiler crash.
>
>
> Regards
> Blas Rodriguez Somoza

To me it seems you are referencing the struct definitions/prototypes, not  
a struct instance. Try something like this:


union test {
	ulong var1;
	struct var2 {
		ubyte zz;
	}
}

union test2 {
	ulong var1;
	pp var2;	
}

struct pp {
	ubyte zz;
}

test foo; // new lines here
test2 bar;

..
..

asm{
	..
	movzx EAX, foo.var2.zz[ESI];
	movzx EAX, bar.var2.zz[ESI];
	..
}

Simen Kjaeraas