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* [gcc r10-11236] s390: libatomic: Fix 16 byte atomic {cas,load,store}
@ 2023-03-03 16:14 Stefan Schulze Frielinghaus
0 siblings, 0 replies; only message in thread
From: Stefan Schulze Frielinghaus @ 2023-03-03 16:14 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:6162b5615627784ab77dcc982310cc249ed791b1
commit r10-11236-g6162b5615627784ab77dcc982310cc249ed791b1
Author: Stefan Schulze Frielinghaus <stefansf@linux.ibm.com>
Date: Fri Mar 3 17:14:13 2023 +0100
s390: libatomic: Fix 16 byte atomic {cas,load,store}
This is a follow-up to commit a4c6bd0821099f6b8c0f64a96ffd9d01a025c413
introducing a runtime check for alignment for 16 byte atomic
compare-exchange, load, and store.
libatomic/ChangeLog:
* config/s390/cas_n.c: New file.
* config/s390/load_n.c: New file.
* config/s390/store_n.c: New file.
(cherry picked from commit 9056d0df830c5a295d7594d517d409d10476990d)
Diff:
---
libatomic/config/s390/cas_n.c | 65 +++++++++++++++++++++++++++++++++++++++++
libatomic/config/s390/load_n.c | 57 ++++++++++++++++++++++++++++++++++++
libatomic/config/s390/store_n.c | 54 ++++++++++++++++++++++++++++++++++
3 files changed, 176 insertions(+)
diff --git a/libatomic/config/s390/cas_n.c b/libatomic/config/s390/cas_n.c
new file mode 100644
index 00000000000..44b7152ca5d
--- /dev/null
+++ b/libatomic/config/s390/cas_n.c
@@ -0,0 +1,65 @@
+/* Copyright (C) 2018-2023 Free Software Foundation, Inc.
+
+ This file is part of the GNU Atomic Library (libatomic).
+
+ Libatomic 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.
+
+ Libatomic 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/>. */
+
+#include <libatomic_i.h>
+
+
+/* Analog to config/s390/exch_n.c. */
+
+#if !DONE && N == 16
+bool
+SIZE(libat_compare_exchange) (UTYPE *mptr, UTYPE *eptr, UTYPE newval,
+ int smodel, int fmodel UNUSED)
+{
+ if (!((uintptr_t)mptr & 0xf))
+ {
+ return __atomic_compare_exchange_n (
+ (UTYPE *)__builtin_assume_aligned (mptr, 16), eptr, newval, false,
+ __ATOMIC_SEQ_CST, __ATOMIC_RELAXED);
+ }
+ else
+ {
+ UTYPE oldval;
+ UWORD magic;
+ bool ret;
+
+ pre_seq_barrier (smodel);
+ magic = protect_start (mptr);
+
+ oldval = *mptr;
+ ret = (oldval == *eptr);
+ if (ret)
+ *mptr = newval;
+ else
+ *eptr = oldval;
+
+ protect_end (mptr, magic);
+ post_seq_barrier (smodel);
+
+ return ret;
+ }
+}
+#define DONE 1
+#endif /* N == 16 */
+
+#include "../../cas_n.c"
diff --git a/libatomic/config/s390/load_n.c b/libatomic/config/s390/load_n.c
new file mode 100644
index 00000000000..335d2f8b2c3
--- /dev/null
+++ b/libatomic/config/s390/load_n.c
@@ -0,0 +1,57 @@
+/* Copyright (C) 2018-2023 Free Software Foundation, Inc.
+
+ This file is part of the GNU Atomic Library (libatomic).
+
+ Libatomic 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.
+
+ Libatomic 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/>. */
+
+#include <libatomic_i.h>
+
+
+/* Analog to config/s390/exch_n.c. */
+
+#if !DONE && N == 16
+UTYPE
+SIZE(libat_load) (UTYPE *mptr, int smodel)
+{
+ if (!((uintptr_t)mptr & 0xf))
+ {
+ return __atomic_load_n ((UTYPE *)__builtin_assume_aligned (mptr, 16),
+ __ATOMIC_SEQ_CST);
+ }
+ else
+ {
+ UTYPE ret;
+ UWORD magic;
+
+ pre_seq_barrier (smodel);
+ magic = protect_start (mptr);
+
+ ret = *mptr;
+
+ protect_end (mptr, magic);
+ post_seq_barrier (smodel);
+
+ return ret;
+ }
+}
+#define DONE 1
+#endif /* N == 16 */
+
+#include "../../load_n.c"
diff --git a/libatomic/config/s390/store_n.c b/libatomic/config/s390/store_n.c
new file mode 100644
index 00000000000..9e5b2b8213d
--- /dev/null
+++ b/libatomic/config/s390/store_n.c
@@ -0,0 +1,54 @@
+/* Copyright (C) 2018-2023 Free Software Foundation, Inc.
+
+ This file is part of the GNU Atomic Library (libatomic).
+
+ Libatomic 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.
+
+ Libatomic 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/>. */
+
+#include <libatomic_i.h>
+
+
+/* Analog to config/s390/exch_n.c. */
+
+#if !DONE && N == 16
+void
+SIZE(libat_store) (UTYPE *mptr, UTYPE newval, int smodel)
+{
+ if (!((uintptr_t)mptr & 0xf))
+ {
+ __atomic_store_n ((UTYPE *)__builtin_assume_aligned (mptr, 16), newval,
+ __ATOMIC_SEQ_CST);
+ }
+ else
+ {
+ UWORD magic;
+
+ pre_seq_barrier (smodel);
+ magic = protect_start (mptr);
+
+ *mptr = newval;
+
+ protect_end (mptr, magic);
+ post_seq_barrier (smodel);
+ }
+}
+#define DONE 1
+#endif /* N == 16 */
+
+#include "../../store_n.c"
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