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authorStafford Horne <shorne@gmail.com>2017-11-16 00:18:43 +0900
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2017-11-18 09:29:55 +0100
commit79958c9e197edb190a79dbec3c224c7a0b54386e (patch)
tree10ad33f47369433605441ced5173ce3f431d6685 /libc
parent87cc945a073bb8d499ca536ed588bb57550ebc26 (diff)
use atomic instructions for atomics
Signed-off-by: Stafford Horne <shorne@gmail.com>
Diffstat (limited to 'libc')
-rw-r--r--libc/sysdeps/linux/or1k/bits/atomic.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/or1k/bits/atomic.h b/libc/sysdeps/linux/or1k/bits/atomic.h
new file mode 100644
index 000000000..233bbdc47
--- /dev/null
+++ b/libc/sysdeps/linux/or1k/bits/atomic.h
@@ -0,0 +1,92 @@
+/* Copyright (C) 2010-2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
+
+ 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
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _OR1K_BITS_ATOMIC_H
+#define _OR1K_BITS_ATOMIC_H
+
+#include <stdint.h>
+
+typedef int8_t atomic8_t;
+typedef uint8_t uatomic8_t;
+typedef int_fast8_t atomic_fast8_t;
+typedef uint_fast8_t uatomic_fast8_t;
+
+typedef int16_t atomic16_t;
+typedef uint16_t uatomic16_t;
+typedef int_fast16_t atomic_fast16_t;
+typedef uint_fast16_t uatomic_fast16_t;
+
+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 int64_t atomic64_t;
+typedef uint64_t uatomic64_t;
+typedef int_fast64_t atomic_fast64_t;
+typedef uint_fast64_t uatomic_fast64_t;
+
+typedef intptr_t atomicptr_t;
+typedef uintptr_t uatomicptr_t;
+typedef intmax_t atomic_max_t;
+typedef uintmax_t uatomic_max_t;
+
+
+#ifndef atomic_full_barrier
+# define atomic_full_barrier() __asm__ ("" ::: "memory")
+#endif
+
+#ifndef atomic_read_barrier
+# define atomic_read_barrier() atomic_full_barrier ()
+#endif
+
+#ifndef atomic_write_barrier
+# define atomic_write_barrier() atomic_full_barrier ()
+#endif
+
+#define atomic_exchange_acq(mem, newval) \
+ ({ __typeof (newval) val; \
+ \
+ __asm__ volatile ( \
+ "1: l.lwa %0, 0(%1) \n" \
+ " l.swa 0(%1), %2 \n" \
+ " l.bnf 1b \n" \
+ " l.nop \n" \
+ : "=&r"(val) \
+ : "r"(mem), "r"(newval) \
+ : "cc", "memory"); \
+ val; })
+
+#define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \
+ ({ __typeof (newval) val; \
+ \
+ __asm__ volatile ( \
+ "1: l.lwa %0, 0(%1) \n" \
+ " l.sfeq %0, %2 \n" \
+ " l.bnf 2f \n" \
+ " l.nop \n" \
+ " l.swa 0(%1), %3 \n" \
+ " l.bnf 1b \n" \
+ " l.nop \n" \
+ "2: \n" \
+ : "=&r"(val) \
+ : "r"(mem), "r"(oldval), "r"(newval) \
+ : "cc", "memory"); \
+ val; })
+
+#endif