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Re: [PATCH] S/390: Hardware transactional memory support
- From: Peter Bergner <bergner at vnet dot ibm dot com>
- To: Andreas Krebbel <krebbel at linux dot vnet dot ibm dot com>
- Cc: Torvald Riegel <triegel at redhat dot com>, gcc-patches at gcc dot gnu dot org
- Date: Fri, 02 Aug 2013 09:23:49 -0500
- Subject: Re: [PATCH] S/390: Hardware transactional memory support
- References: <20130621102314 dot GA753 at bart> <1375443114 dot 9970 dot 187 dot camel at triegel dot csb> <51FBB13E dot 9080403 at linux dot vnet dot ibm dot com>
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?