OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

libitm: Introduce target macro TARGET_BEGIN_TRANSACTION_ATTRIBUTE. 

The attached patch adds the a target specific attribute via the
new target macro TARGET_BEGIN_TRANSACTION_ATTRIBUTE to the
function begin_transaction().  S/390 uses this to set the
soft-float target attribute which is needed to fix a crash with
-m31.

As there seems to be no place in libitm to document internal macros like
USE_HTM_FASTPATH or the new macro, I've put the documentation in a
comment where the macro is used.

2016-03-03  Dominik Vogt  <vogt@linux.vnet.ibm.com>

	* config/s390/target.h (TARGET_BEGIN_TRANSACTION_ATTRIBUTE): Define
	function attribute to disable floating point in begin_transaction() on
	S/390.
	* beginend.cc (begin_transaction): Use
	TARGET_BEGIN_TRANSACTION_ATTRIBUTE.

From-SVN: r233929
This commit is contained in:
Dominik Vogt 2016-03-03 09:31:57 +00:00 committed by Andreas Krebbel
parent a75f5e30cc
commit edcbda7e2c
3 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
libitm/ChangeLog
View File

@ -1,3 +1,11 @@
2016-03-03 Dominik Vogt <vogt@linux.vnet.ibm.com>
* config/s390/target.h (TARGET_BEGIN_TRANSACTION_ATTRIBUTE): Define
function attribute to disable floating point in begin_transaction() on
S/390.
* beginend.cc (begin_transaction): Use
TARGET_BEGIN_TRANSACTION_ATTRIBUTE.
2016-01-22 Torvald Riegel <triegel@redhat.com>
* beginend.cc (GTM::gtm_thread::serial_lock): Put on cacheline

6
libitm/beginend.cc
View File

@ -149,6 +149,12 @@ choose_code_path(uint32_t prop, abi_dispatch *disp)
return a_runInstrumentedCode;
}
#ifdef TARGET_BEGIN_TRANSACTION_ATTRIBUTE
/* This macro can be used to define target specific attributes for this
function. For example, S/390 requires floating point to be disabled in
begin_transaction. */
TARGET_BEGIN_TRANSACTION_ATTRIBUTE
#endif
uint32_t
GTM::gtm_thread::begin_transaction (uint32_t prop, const gtm_jmpbuf *jb)
{

3
libitm/config/s390/target.h
View File

@ -69,6 +69,9 @@ cpu_relax (void)
/* Number of retries for transient failures. */
#define _HTM_ITM_RETRIES 10
#define USE_HTM_FASTPATH
#define TARGET_BEGIN_TRANSACTION_ATTRIBUTE \
__attribute__ ((target("soft-float")))
static inline bool
htm_available ()