From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: libc-alpha@sourceware.org
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>,
linux-snps-arc@lists.infradead.org
Subject: [PATCH v7 04/13] ARC: Atomics and Locking primitives
Date: Mon, 15 Jun 2020 13:14:32 -0700 [thread overview]
Message-ID: <20200615201441.31820-5-vgupta@synopsys.com> (raw)
In-Reply-To: <20200615201441.31820-1-vgupta@synopsys.com>
---
sysdeps/arc/atomic-machine.h | 69 ++++++++++++++++++++++++++++++++++++
1 file changed, 69 insertions(+)
create mode 100644 sysdeps/arc/atomic-machine.h
diff --git a/sysdeps/arc/atomic-machine.h b/sysdeps/arc/atomic-machine.h
new file mode 100644
index 000000000000..1c8638bb44ef
--- /dev/null
+++ b/sysdeps/arc/atomic-machine.h
@@ -0,0 +1,69 @@
+/* Low-level functions for atomic operations. ARC version.
+ Copyright (C) 2020 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _ARC_BITS_ATOMIC_H
+#define _ARC_BITS_ATOMIC_H 1
+
+#include <stdint.h>
+
+typedef int32_t atomic32_t;
+typedef uint32_t uatomic32_t;
+typedef int_fast32_t atomic_fast32_t;
+typedef uint_fast32_t uatomic_fast32_t;
+
+typedef intptr_t atomicptr_t;
+typedef uintptr_t uatomicptr_t;
+typedef intmax_t atomic_max_t;
+typedef uintmax_t uatomic_max_t;
+
+#define __HAVE_64B_ATOMICS 0
+#define USE_ATOMIC_COMPILER_BUILTINS 1
+
+/* ARC does have legacy atomic EX reg, [mem] instruction but the micro-arch
+ is not as optimal as LLOCK/SCOND specially for SMP. */
+#define ATOMIC_EXCHANGE_USES_CAS 1
+
+#define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \
+ (abort (), 0)
+#define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \
+ (abort (), 0)
+#define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
+ (abort (), 0)
+
+#define __arch_compare_and_exchange_val_8_int(mem, newval, oldval, model) \
+ (abort (), (__typeof (*mem)) 0)
+#define __arch_compare_and_exchange_val_16_int(mem, newval, oldval, model) \
+ (abort (), (__typeof (*mem)) 0)
+#define __arch_compare_and_exchange_val_64_int(mem, newval, oldval, model) \
+ (abort (), (__typeof (*mem)) 0)
+
+#define __arch_compare_and_exchange_val_32_int(mem, newval, oldval, model) \
+ ({ \
+ typeof (*mem) __oldval = (oldval); \
+ __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \
+ model, __ATOMIC_RELAXED); \
+ __oldval; \
+ })
+
+#define atomic_compare_and_exchange_val_acq(mem, new, old) \
+ __atomic_val_bysize (__arch_compare_and_exchange_val, int, \
+ mem, new, old, __ATOMIC_ACQUIRE)
+
+#define atomic_full_barrier() ({ asm volatile ("dmb 3":::"memory"); })
+
+#endif /* _ARC_BITS_ATOMIC_H */
--
2.20.1
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next prev parent reply other threads:[~2020-06-15 20:14 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-15 20:14 [PATCH v7 00/13] glibc port to ARC processors Vineet Gupta
2020-06-15 20:14 ` [PATCH v7 01/13] ARC: ABI Implementation Vineet Gupta
2020-07-01 0:06 ` [PATCH v7.1 " Vineet Gupta
[not found] ` <b6322150-240a-5f06-b700-83e3eb79deec@linaro.org>
2020-07-01 19:36 ` Vineet Gupta
2020-07-01 19:45 ` Adhemerval Zanella
2020-06-15 20:14 ` [PATCH v7 02/13] ARC: startup and dynamic linking code Vineet Gupta
2020-06-15 20:14 ` [PATCH v7 03/13] ARC: Thread Local Storage support Vineet Gupta
2020-07-01 0:07 ` [PATCH v7.1 " Vineet Gupta
2020-06-15 20:14 ` Vineet Gupta [this message]
2020-06-15 20:14 ` [PATCH v7 05/13] ARC: math soft float support Vineet Gupta
2020-06-15 20:14 ` [PATCH v7 06/13] ARC: hardware floating point support Vineet Gupta
2020-07-01 0:08 ` [PATCH v7.1 " Vineet Gupta
2020-06-15 20:14 ` [PATCH v7 07/13] ARC: Linux Syscall Interface Vineet Gupta
2020-07-01 0:08 ` [PATCH v7.1 " Vineet Gupta
[not found] ` <e9e2ae28-cd78-5924-c1fa-52b1499c245a@linaro.org>
2020-07-04 3:54 ` Vineet Gupta
2020-07-06 13:20 ` Adhemerval Zanella
2020-07-07 1:25 ` Vineet Gupta
2020-07-07 19:24 ` Adhemerval Zanella
2020-07-07 20:55 ` [PATCH v7.2 " Vineet Gupta
[not found] ` <b64d0df1-4229-d619-0ab1-ded287323775@linaro.org>
2020-07-08 19:32 ` Vineet Gupta
2020-07-09 16:03 ` Adhemerval Zanella
2020-07-09 16:24 ` Vineet Gupta
2020-07-09 16:25 ` Adhemerval Zanella
2020-07-09 21:13 ` Vineet Gupta
2020-07-09 21:36 ` ARC testsuite regressions (was Re: [PATCH v7.2 07/13] ARC: Linux Syscall Interface) Vineet Gupta
2020-07-09 22:01 ` Alistair Francis
2020-07-09 22:16 ` Vineet Gupta
2020-07-10 9:28 ` Florian Weimer
2020-07-10 15:53 ` Vineet Gupta
2020-07-10 17:02 ` Florian Weimer
2020-07-10 20:07 ` Vineet Gupta
2020-07-10 20:32 ` Florian Weimer
2020-07-10 19:12 ` Alistair Francis
2020-07-10 20:33 ` Florian Weimer
2020-07-10 20:56 ` Alistair Francis
2020-07-10 19:10 ` Alistair Francis
2020-07-07 21:07 ` [PATCH v7.1 07/13] ARC: Linux Syscall Interface Vineet Gupta
2020-07-07 21:32 ` Joseph Myers
2020-07-07 23:16 ` Vineet Gupta
2020-06-15 20:14 ` [PATCH v7 08/13] ARC: Linux ABI Vineet Gupta
2020-06-15 20:14 ` [PATCH v7 09/13] ARC: Linux Startup and Dynamic Loading Vineet Gupta
2020-06-15 20:14 ` [PATCH v7 10/13] ARC: ABI lists Vineet Gupta
2020-07-01 0:09 ` [PATCH v7.1 " Vineet Gupta
2020-06-15 20:14 ` [PATCH v7 11/13] ARC: Build Infrastructure Vineet Gupta
2020-07-03 17:09 ` Adhemerval Zanella
2020-06-15 20:14 ` [PATCH v7 12/13] build-many-glibcs.py: Enable ARC builds Vineet Gupta
2020-07-03 17:37 ` Adhemerval Zanella
2020-06-15 20:14 ` [PATCH v7 13/13] Documentation for ARC port Vineet Gupta
2020-07-03 17:38 ` Adhemerval Zanella
2020-06-23 16:56 ` [PATCH v7 00/13] glibc port to ARC processors Vineet Gupta
2020-07-01 0:11 ` Vineet Gupta
2020-07-01 1:44 ` Adhemerval Zanella
2020-07-01 19:13 ` Vineet Gupta
2020-07-02 1:00 ` ARC math test regressions (was Re: [PATCH v7 00/13] glibc port to ARC processors) Vineet Gupta
2020-07-02 7:17 ` Andreas Schwab
2020-07-02 16:27 ` Joseph Myers
2020-07-02 17:45 ` Vineet Gupta
2020-07-02 21:27 ` [PATCH v7 00/13] glibc port to ARC processors Joseph Myers
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