| 26,10 → 26,10 |
|---|
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup arm32 |
| /** @addtogroup arm32 |
| * @{ |
| */ |
| /** @file |
| /** @file |
| * @brief Atomic operations. |
| */ |
| |
| 42,26 → 42,26 |
|---|
| * @param i Value to be added. |
| * |
| * @return Value after addition. |
| * |
| */ |
| static inline long atomic_add(atomic_t *val, int i) |
| { |
| int ret; |
| volatile long *mem = &(val->count); |
| |
| |
| asm volatile ( |
| "1:\n" |
| "ldr r2, [%1] \n" |
| "add r3, r2, %2 \n" |
| "str r3, %0 \n" |
| "swp r3, r3, [%1] \n" |
| "cmp r3, r2 \n" |
| "bne 1b \n" |
| |
| : "=m" (ret) |
| : "r" (mem), "r" (i) |
| "1:\n" |
| "ldr r2, [%[mem]]\n" |
| "add r3, r2, %[i]\n" |
| "str r3, %[ret]\n" |
| "swp r3, r3, [%[mem]]\n" |
| "cmp r3, r2\n" |
| "bne 1b\n" |
| : [ret] "=m" (ret) |
| : [mem] "r" (mem), [i] "r" (i) |
| : "r3", "r2" |
| ); |
| |
| |
| return ret; |
| } |
| |