Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode

[Andi Kleen]

Stefan Weil <address@hidden> writes:
> +
> +        switch (opc) {
> +        case INDEX_op_end:
> +        case INDEX_op_nop:
> +            break;

You could probably get some more speed out of this by using a threaded
interpreter with gcc's computed goto extension. That's typically
significantly faster than a plain switch in a loop.

static void *ops[] = {
       &&op1,
       &&op2,
       ...
};

#define NEXT() goto *ops[*tb_ptr++];

        op1:
                ...
                NEXT();

-Andi

-- 
address@hidden -- Speaking for myself only