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Re: Java: add flag_use_atomic_builtins
Paolo Bonzini wrote:
> On 08/12/2009 06:52 PM, Andrew Haley wrote:
>> Joseph S. Myers wrote:
>>> On Wed, 12 Aug 2009, Andrew Haley wrote:
>>>
>>>> Some targets, particularly ARM, don't have instructions for things
>>>> such as sync_compare_and_swap. Instead, a routine in libgcc is
>>>> used. This patch adds a new gcj option, -fuse-atomic-builtins,
>>>> which causes gcj to use the routines in libgcc whenever atomic
>>>> operations are needed.
>>> Wouldn't a target hook to allow a target to declare which operations it
>>> provides in libgcc be better than a command-line option?
>>
>> Maybe it would. I'm happy to work with anyone to create such a
>> thing. What would such a hook look like, and how would a front-
>> end use it?
>
> Couldn't optabs be (re)used?
That would be nice.
Andrew.