locking problem with mips atomicity

[Richard Henderson]

On Wed, Mar 17, 2004 at 02:45:08PM -0800, Michael Eager wrote:
> +       "ll	%0,0(%2)\n\t"
> +       "addu	%1,%3,%0\n\t"
> +       "sc	%1,0(%2)\n\t"
>         ".set	pop\n\t"
>         "beqz	%1,1b\n\t"
>         "/* End exchange & add */"
> +       : "=&r"(__result), "=&r"(__tmp), "+r"(__mem)

Why the in-out constraint on __mem?  You don't modify %2.


r~