Re: [Qemu-devel] [PATCH 09/10] target-alpha: Implement load-locked/store-conditional properly.

[Nathan Froyd]

On Thu, Mar 25, 2010 at 09:29:18AM -0700, Richard Henderson wrote:
> On 03/25/2010 09:06 AM, Nathan Froyd wrote:
> > It pretends just as much as ppc and arm.  See translate.c:OP_ST_ATOMIC.
> 
> No it doesn't.  Look at HELPER_ST_ATOMIC:
> 
>         tmp = do_##ld_insn(arg2, mem_idx);                                    
> \
>         if (tmp == env->llval) {                                              
> \
>             do_##st_insn(arg2, arg1, mem_idx);                                
> \
>             return 1;                                                         
> \

Ah, OK.  Those helpers are never called for user-mode emulation,
though.  They're only called for system emulation and...well, everybody
lies about being atomic in system mode. :)

-Nathan