diff options
| author | Dominik Vogt <vogt@linux.vnet.ibm.com> | 2016-03-03 09:31:57 +0000 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@gcc.gnu.org> | 2016-03-03 09:31:57 +0000 |
| commit | edcbda7e2ce5fd3411402fbd117d3900443f8451 (patch) | |
| tree | 37478a7bb9920e476231d5fa32ad25f1babd343e /libitm | |
| parent | a75f5e30cc27568bbc2bc0629425598e89bf9059 (diff) | |
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
Diffstat (limited to 'libitm')
| -rw-r--r-- | libitm/ChangeLog | 8 | ||||
| -rw-r--r-- | libitm/beginend.cc | 6 | ||||
| -rw-r--r-- | libitm/config/s390/target.h | 3 |
3 files changed, 17 insertions, 0 deletions
diff --git a/libitm/ChangeLog b/libitm/ChangeLog index 2a3554fd6af..42b47762b9f 100644 --- a/libitm/ChangeLog +++ b/libitm/ChangeLog @@ -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 diff --git a/libitm/beginend.cc b/libitm/beginend.cc index 1a258ad7965..20b5547c30d 100644 --- a/libitm/beginend.cc +++ b/libitm/beginend.cc @@ -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) { diff --git a/libitm/config/s390/target.h b/libitm/config/s390/target.h index 44819a4d244..c9d52034d1a 100644 --- a/libitm/config/s390/target.h +++ b/libitm/config/s390/target.h @@ -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 () |