Mixin in Inline Assembly

[Chris M. via Digitalmars-d-learn]

Right now I'm working on a project where I'm implementing a VM in 
D. I'm on the rotate instructions, and realized I could *almost* 
abstract the ror and rol instructions with the following function

private void rot(string ins)(int *op1, int op2)
{
     int tmp = *op1;
     asm
     {
         mov EAX, tmp; // I'd also like to know if I could just 
load *op1 directly into EAX
         mov ECX, op2[EBP];
         mixin(ins ~ " EAX, CL;"); // Issue here
         mov tmp, EAX;
     }
     *op1 = tmp;
}

However, the inline assembler doesn't like me trying to do a 
mixin. Is there a way around this?

(There is a reason op1 is a pointer instead of a ref int, please 
don't ask about it)