diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2020-08-08 23:28:17 -0700 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2020-08-11 13:35:02 +0200 |
| commit | fc48f4fb0506b2ea6ef3bb33037be3a4da2874bc (patch) | |
| tree | aa83e91570361d19ca569ea68d279b98b69ec3b5 /libpthread/nptl | |
| parent | c2e5177b97825211565150b4f9a7f253e0458619 (diff) | |
xtensa: add exclusive access support
Add XCHAL definitions for S32C1I and EXCLUSIVE options to
xtensa-config.h, include it in places that implement atomic operations
and add implementations with exclusive access option opcodes.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'libpthread/nptl')
| -rw-r--r-- | libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S | 16 | ||||
| -rw-r--r-- | libpthread/nptl/sysdeps/xtensa/pthread_spin_trylock.S | 17 |
2 files changed, 33 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S b/libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S index 3386afae9..3faac36da 100644 --- a/libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S +++ b/libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S @@ -15,16 +15,32 @@ License along with the GNU C Library; see the file COPYING.LIB. If not, see <http://www.gnu.org/licenses/>. */ +#include <bits/xtensa-config.h> #include <sysdep.h> .text ENTRY (pthread_spin_lock) +#if XCHAL_HAVE_EXCLUSIVE + memw +1: l32ex a3, a2 + bnez a3, 1b + movi a3, 1 + s32ex a3, a2 + getex a3 + beqz a3, 1b + memw +#elif XCHAL_HAVE_S32C1I movi a3, 0 wsr a3, scompare1 movi a3, 1 1: s32c1i a3, a2, 0 bnez a3, 1b +#else + +#error No hardware atomic operations + +#endif movi a2, 0 abi_ret 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 |