1 /* Copyright (C) 2013-2018 Free Software Foundation, Inc.
2 Contributed by Andreas Krebbel <krebbel@linux.vnet.ibm.com>.
4 This file is part of the GNU Transactional Memory Library (libitm).
6 Libitm is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 Under Section 7 of GPL version 3, you are granted additional
17 permissions described in the GCC Runtime Library Exception, version
18 3.1, as published by the Free Software Foundation.
20 You should have received a copy of the GNU General Public License and
21 a copy of the GCC Runtime Library Exception along with this program;
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 <http://www.gnu.org/licenses/>. */
25 #ifdef HAVE_SYS_AUXV_H
29 namespace GTM HIDDEN
{
31 #define HW_CACHELINE_SIZE 256
33 typedef struct gtm_jmpbuf
35 /* We save registers r6-r14. */
37 /* r15 is stored into cfa field. It needs to be named that way
38 since tls.h is accessing the field by name. Be aware that this
39 is not actually what we consider the CFA on s390 (since there is
40 a fix offset between sp and CFA). It is merely the saved stack
45 /* We save fpu registers f8 - f15. */
48 /* We save fpu registers f4 and f6. */
56 __asm
volatile ("" : : : "memory");
60 // Use HTM if it is supported by the system.
61 // See gtm_thread::begin_transaction for how these functions are used.
62 #if defined (__linux__) \
63 && defined (HAVE_AS_HTM) \
64 && defined (HAVE_GETAUXVAL) \
65 && defined (HWCAP_S390_TE)
67 #include <htmintrin.h>
69 /* Number of retries for transient failures. */
70 #define _HTM_ITM_RETRIES 10
71 #define USE_HTM_FASTPATH
72 #define TARGET_BEGIN_TRANSACTION_ATTRIBUTE \
73 __attribute__ ((target("soft-float")))
79 return (getauxval (AT_HWCAP
) & HWCAP_S390_TE
) ? true : false;
82 static inline uint32_t
85 return htm_available () ? _HTM_ITM_RETRIES
: 0;
88 static inline uint32_t
91 __asm
volatile (".machine \"all\" \n\t");
92 return __builtin_tbegin_nofloat (NULL
);
96 htm_begin_success (uint32_t begin_ret
)
98 return begin_ret
== _HTM_TBEGIN_STARTED
;
104 __asm
volatile (".machine \"all\" \n\t");
111 __asm
volatile (".machine \"all\" \n\t");
112 __builtin_tabort (_HTM_FIRST_USER_ABORT_CODE
);
116 htm_abort_should_retry (uint32_t begin_ret
)
118 return begin_ret
== _HTM_TBEGIN_TRANSIENT
;
122 htm_transaction_active ()
124 __asm
volatile (".machine \"all\" \n\t");
125 return __builtin_tx_nesting_depth() != 0;