diff options
| author | Andreas Krebbel <Andreas.Krebbel@de.ibm.com> | 2013-07-17 11:15:24 +0000 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@gcc.gnu.org> | 2013-07-17 11:15:24 +0000 |
| commit | 167f68ede42b2bb0bf287769951c5a6aca3e7281 (patch) | |
| tree | 7c128616f0a4ca4d09f410d31fee5de4433fc49c /libitm/config | |
| parent | 1b2d0112c5dd2d847aaa4e6bf529fc74e78158fb (diff) | |
| download | gcc-167f68ede42b2bb0bf287769951c5a6aca3e7281.zip gcc-167f68ede42b2bb0bf287769951c5a6aca3e7281.tar.gz gcc-167f68ede42b2bb0bf287769951c5a6aca3e7281.tar.bz2 | |
s390.c: (s390_expand_builtin): Allow -mhtm to be enabled without -march=zEC12.
2013-07-17 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
* config/s390/s390.c: (s390_expand_builtin): Allow -mhtm to be
enabled without -march=zEC12.
* config/s390/s390.h (TARGET_HTM): Do not require EC12 machine
flags to be set.
2013-07-17 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
* acinclude.m4: Add htm asm check for s390.
* configure.tgt: Add -mhtm and -Wa,-march=zEC12 to the options.
* configure: Regenerate.
* config/s390/target.h: Remove __HTM__ check.
(htm_available): Call getauxval to get hwcaps and check whether
HTM is available or not.
From-SVN: r201004
Diffstat (limited to 'libitm/config')
| -rw-r--r-- | libitm/config/s390/target.h | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/libitm/config/s390/target.h b/libitm/config/s390/target.h index 580606f..17228f8 100644 --- a/libitm/config/s390/target.h +++ b/libitm/config/s390/target.h @@ -22,11 +22,9 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ - -#include <htmintrin.h> - -/* Number of retries for transient failures. */ -#define _HTM_ITM_RETRIES 10 +#ifdef HAVE_SYS_AUXV_H +#include <sys/auxv.h> +#endif namespace GTM HIDDEN { @@ -58,13 +56,24 @@ cpu_relax (void) __asm volatile ("" : : : "memory"); } -#ifdef __HTM__ + +// Use HTM if it is supported by the system. +// See gtm_thread::begin_transaction for how these functions are used. +#if defined (__linux__) \ + && defined (HAVE_AS_HTM) \ + && defined (HAVE_GETAUXVAL) \ + && defined (HWCAP_S390_TE) + +#include <htmintrin.h> + +/* Number of retries for transient failures. */ +#define _HTM_ITM_RETRIES 10 #define USE_HTM_FASTPATH static inline bool htm_available () { - return true; + return (getauxval (AT_HWCAP) & HWCAP_S390_TE) ? true : false; } static inline uint32_t |