diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/csky/pthread_spin_trylock.S')
| -rw-r--r-- | libpthread/nptl/sysdeps/csky/pthread_spin_trylock.S | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/csky/pthread_spin_trylock.S b/libpthread/nptl/sysdeps/csky/pthread_spin_trylock.S new file mode 100644 index 000000000..113e94d51 --- /dev/null +++ b/libpthread/nptl/sysdeps/csky/pthread_spin_trylock.S @@ -0,0 +1,16 @@ +#define _ERRNO_H 1 +#include <bits/errno.h> +#include <sysdep.h> + +.text +ENTRY (pthread_spin_trylock) + mov a2, a0 + movi a0, 0 + movi a1, 1 + trap 2 // trap 2 use to cmpxchg + cmpnei a0, 0 + bf 1f + movi a0, EBUSY +1: + jmp r15 +END (pthread_spin_trylock) |