diff options
Diffstat (limited to 'boehm-gc/include/private/gc_locks.h')
| -rw-r--r-- | boehm-gc/include/private/gc_locks.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/boehm-gc/include/private/gc_locks.h b/boehm-gc/include/private/gc_locks.h index 775176b3151..46605caf72d 100644 --- a/boehm-gc/include/private/gc_locks.h +++ b/boehm-gc/include/private/gc_locks.h @@ -215,6 +215,30 @@ } # define GC_TEST_AND_SET_DEFINED # endif /* ARM32 */ +# ifdef CRIS + inline static int GC_test_and_set(volatile unsigned int *addr) { + /* Ripped from linuxthreads/sysdeps/cris/pt-machine.h. */ + /* Included with Hans-Peter Nilsson's permission. */ + register unsigned long int ret; + + /* Note the use of a dummy output of *addr to expose the write. + * The memory barrier is to stop *other* writes being moved past + * this code. + */ + __asm__ __volatile__("clearf\n" + "0:\n\t" + "movu.b [%2],%0\n\t" + "ax\n\t" + "move.b %3,[%2]\n\t" + "bwf 0b\n\t" + "clearf" + : "=&r" (ret), "=m" (*addr) + : "r" (addr), "r" ((int) 1), "m" (*addr) + : "memory"); + return ret; + } +# define GC_TEST_AND_SET_DEFINED +# endif /* CRIS */ # ifdef S390 inline static int GC_test_and_set(volatile unsigned int *addr) { int ret; |