diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/xtensa/pthread_spin_trylock.S')
| -rw-r--r-- | libpthread/nptl/sysdeps/xtensa/pthread_spin_trylock.S | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/xtensa/pthread_spin_trylock.S b/libpthread/nptl/sysdeps/xtensa/pthread_spin_trylock.S index 72b2dda92..0669682ec 100644 --- a/libpthread/nptl/sysdeps/xtensa/pthread_spin_trylock.S +++ b/libpthread/nptl/sysdeps/xtensa/pthread_spin_trylock.S @@ -17,15 +17,32 @@ #define _ERRNO_H 1 #include <bits/errno.h> +#include <bits/xtensa-config.h> #include <sysdep.h> .text ENTRY (pthread_spin_trylock) +#if XCHAL_HAVE_EXCLUSIVE + memw + l32ex a3, a2 + bnez a3, 1f + movi a3, 1 + s32ex a3, a2 + getex a3 + addi a3, a3, -1 + memw +1: +#elif XCHAL_HAVE_S32C1I movi a3, 0 wsr a3, scompare1 movi a3, 1 s32c1i a3, a2, 0 +#else + +#error No hardware atomic operations + +#endif movi a2, EBUSY moveqz a2, a3, a3 |