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From: "bergner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/61193] ABI incompatibility between POWER and Z HTM builtins and intrinsics Date: Fri, 16 May 2014 03:51:00 -0000 [thread overview] Message-ID: <bug-61193-4-l4Q4uipShe@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-61193-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61193 Peter Bergner <bergner at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2014-05-16 Assignee|unassigned at gcc dot gnu.org |bergner at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #4 from Peter Bergner <bergner at gcc dot gnu.org> --- After discussing this with the XL compiler team, the S390 GCC team and the Power GCC team, we have decided to leave the incompatibility between Power and S390. However, the XL and GCC compilers will be compatible with each other when targeting the same processor target. To mitigate the incompatibility somewhat, we have decided to add a macro to the powerpc*-linux's htmintrin.h file that defines what the "sucessful" return status value of the __TM_simple_begin() and __TM_begin() intrinsic function is. This macro is already defined in the S390's htmintrin.h header file and is used by the S390 to determine whether the transaction was successfully started or not. By adding the same macro on Power, we allow users to write common code between Power and S390, even though our successful return status values are different. For example, the following code can be used on Power and S390, even though the actual value returned by __TM_simple_begin() is different. if ((tx_state = __TM_simple_begin ()) == _HTM_TBEGIN_STARTED) { /* Transaction State Initiated. */ ... } else { /* Transaction State Failed. */ ... }
next prev parent reply other threads:[~2014-05-16 3:51 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-05-15 12:01 [Bug target/61193] New: " bergner at gcc dot gnu.org 2014-05-15 12:03 ` [Bug target/61193] " bergner at gcc dot gnu.org 2014-05-15 12:08 ` bergner at gcc dot gnu.org 2014-05-16 3:44 ` bergner at gcc dot gnu.org 2014-05-16 3:46 ` bergner at gcc dot gnu.org 2014-05-16 3:51 ` bergner at gcc dot gnu.org [this message] 2014-05-16 3:59 ` bergner at gcc dot gnu.org
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