mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 04:31:03 +00:00
89 lines
3.6 KiB
C
89 lines
3.6 KiB
C
/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
|
|
|
|
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 _ATOMIC_MACHINE_H
|
|
#define _ATOMIC_MACHINE_H 1
|
|
|
|
#include <asm/unistd.h>
|
|
|
|
#define __HAVE_64B_ATOMICS 0
|
|
#define USE_ATOMIC_COMPILER_BUILTINS 0
|
|
|
|
/* 32-bit integer compare-and-exchange. */
|
|
static __inline __attribute__ ((always_inline))
|
|
int __atomic_cmpxchg_32 (volatile int *mem, int newval, int oldval)
|
|
{
|
|
int result;
|
|
__asm__ __volatile__ ("swint1"
|
|
: "=R00" (result), "=m" (*mem)
|
|
: "R10" (__NR_FAST_cmpxchg), "R00" (mem),
|
|
"R01" (oldval), "R02" (newval), "m" (*mem)
|
|
: "r20", "r21", "r22", "r23", "r24",
|
|
"r25", "r26", "r27", "r28", "r29", "memory");
|
|
return result;
|
|
}
|
|
|
|
#define atomic_compare_and_exchange_val_acq(mem, n, o) \
|
|
({ \
|
|
if (sizeof (*(mem)) != 4) \
|
|
__atomic_error_bad_argument_size (); \
|
|
(__typeof (*(mem))) \
|
|
__atomic_cmpxchg_32 ((int *) (mem), (int) (n), (int) (o)); \
|
|
})
|
|
|
|
/* Atomically compute:
|
|
int old = *ptr;
|
|
*ptr = (old & mask) + addend;
|
|
return old; */
|
|
|
|
static __inline __attribute__ ((always_inline))
|
|
int __atomic_update_32 (volatile int *mem, int mask, int addend)
|
|
{
|
|
int result;
|
|
__asm__ __volatile__ ("swint1"
|
|
: "=R00" (result), "=m" (*mem)
|
|
: "R10" (__NR_FAST_atomic_update), "R00" (mem),
|
|
"R01" (mask), "R02" (addend), "m" (*mem)
|
|
: "r20", "r21", "r22", "r23", "r24",
|
|
"r25", "r26", "r27", "r28", "r29", "memory");
|
|
return result;
|
|
}
|
|
|
|
/* Size-checked verson of __atomic_update_32. */
|
|
#define __atomic_update(mem, mask, addend) \
|
|
({ \
|
|
if (sizeof (*(mem)) != 4) \
|
|
__atomic_error_bad_argument_size (); \
|
|
(__typeof (*(mem))) \
|
|
__atomic_update_32 ((int *) (mem), (int) (mask), (int) (addend)); \
|
|
})
|
|
|
|
#define atomic_exchange_acq(mem, newvalue) \
|
|
__atomic_update ((mem), 0, (newvalue))
|
|
#define atomic_exchange_and_add(mem, value) \
|
|
__atomic_update ((mem), -1, (value))
|
|
#define atomic_and_val(mem, mask) \
|
|
__atomic_update ((mem), (mask), 0)
|
|
#define atomic_or_val(mem, mask) \
|
|
({ __typeof (mask) __att1_v = (mask); \
|
|
__atomic_update ((mem), ~__att1_v, __att1_v); })
|
|
|
|
#include <sysdeps/tile/atomic-machine.h>
|
|
|
|
#endif /* atomic-machine.h */
|