| /* Copyright (C) 2011-2014 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 _BITS_ATOMIC_H |
| #define _BITS_ATOMIC_H 1 |
| |
| #include <asm/unistd.h> |
| |
| /* 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) \ |
| ((__typeof (*(mem))) \ |
| ((sizeof (*(mem)) == 4) ? \ |
| __atomic_cmpxchg_32 ((int *) (mem), (int) (n), (int) (o)) : \ |
| __atomic_error_bad_argument_size())) |
| |
| /* 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) \ |
| ((__typeof (*(mem))) \ |
| ((sizeof (*(mem)) == 4) ? \ |
| __atomic_update_32 ((int *) (mem), (int) (mask), (int) (addend)) : \ |
| __atomic_error_bad_argument_size ())) |
| |
| #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/bits/atomic.h> |
| |
| #endif /* bits/atomic.h */ |