1 files changed, 127 insertions, 0 deletions
diff --git a/gcc-4.8.3/libitm/config/s390/target.h b/gcc-4.8.3/libitm/config/s390/target.h
new file mode 100644
index 000000000..cec49cf77
--- /dev/null
+++ b/gcc-4.8.3/libitm/config/s390/target.h
@@ -0,0 +1,127 @@
+/* Copyright (C) 2013 Free Software Foundation, Inc.
+   Contributed by Andreas Krebbel <krebbel@linux.vnet.ibm.com>.
+
+   This file is part of the GNU Transactional Memory Library (libitm).
+
+   Libitm is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
+   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+   FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+   more details.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_SYS_AUXV_H
+#include <sys/auxv.h>
+#endif
+
+namespace GTM HIDDEN {
+
+#define HW_CACHELINE_SIZE 256
+
+typedef struct gtm_jmpbuf
+{
+  /* We save registers r6-r14.  */
+  long int __gregs[9];
+  /* r15 is stored into cfa field.  It needs to be named that way
+     since tls.h is accessing the field by name.  Be aware that this
+     is not actually what we consider the CFA on s390 (since there is
+     a fix offset between sp and CFA).  It is merely the saved stack
+     pointer.  */
+  void *cfa;
+
+#ifdef __s390x__
+  /* We save fpu registers f8 - f15.  */
+  long __fpregs[8];
+#else
+  /* We save fpu registers f4 and f6.  */
+  long __fpregs[4];
+#endif
+} gtm_jmpbuf;
+
+static inline void
+cpu_relax (void)
+{
+  __asm volatile ("" : : : "memory");
+}
+
+
+// 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 (getauxval (AT_HWCAP) & HWCAP_S390_TE) ? true : false;
+}
+
+static inline uint32_t
+htm_init ()
+{
+  return htm_available () ? _HTM_ITM_RETRIES : 0;
+}
+
+static inline uint32_t
+htm_begin ()
+{
+  __asm volatile (".machine \"all\"  \n\t");
+  return __builtin_tbegin_nofloat (NULL);
+}
+
+static inline bool
+htm_begin_success (uint32_t begin_ret)
+{
+  return begin_ret == _HTM_TBEGIN_STARTED;
+}
+
+static inline void
+htm_commit ()
+{
+  __asm volatile (".machine \"all\"  \n\t");
+  __builtin_tend ();
+}
+
+static inline void
+htm_abort ()
+{
+  __asm volatile (".machine \"all\"  \n\t");
+  __builtin_tabort (_HTM_FIRST_USER_ABORT_CODE);
+}
+
+static inline bool
+htm_abort_should_retry (uint32_t begin_ret)
+{
+  return begin_ret == _HTM_TBEGIN_TRANSIENT;
+}
+
+static inline bool
+htm_transaction_active ()
+{
+  __asm volatile (".machine \"all\"  \n\t");
+  return __builtin_tx_nesting_depth() != 0;
+}
+
+#endif
+
+} // namespace GTM