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Re: [PATCH] S/390: Hardware transactional memory support


On 02/08/13 16:23, Peter Bergner wrote:
> On Fri, 2013-08-02 at 15:16 +0200, Andreas Krebbel wrote:
>> Since libitm implements TX begins as function calls only call-saved registers can be live across a
>> tbegin. But all the call-saved FPRs are saved in _ITM_beginTransaction and get restored when doing
>> the longjmp back into the user code. So this should be no problem.
> 
> Except that the htm_begin() routines are declared static inline functions,
> so when they're inlined, you aren't protected by the semantics of a call
> anymore, are you?

They get inlined into libitm code but not into the user code. As I understand it in the user code
will always be a call to _ITM_beginTransaction.

-Andreas-

> 
> Peter
> 
> 
> 


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