diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/metag/pthread_spin_trylock.S')
| -rw-r--r-- | libpthread/nptl/sysdeps/metag/pthread_spin_trylock.S | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/metag/pthread_spin_trylock.S b/libpthread/nptl/sysdeps/metag/pthread_spin_trylock.S new file mode 100644 index 000000000..e0b9b5083 --- /dev/null +++ b/libpthread/nptl/sysdeps/metag/pthread_spin_trylock.S @@ -0,0 +1,24 @@ +! Copyright (C) 2013 Imagination Technologies Ltd. + +! Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + +#include <pthread-errnos.h> + + .text + .global _pthread_spin_trylock + .type _pthread_spin_trylock,function +_pthread_spin_trylock: +1: MOVT D0Re0, #HI(#EBUSY) + ADD D0Re0, D0Re0, #LO(#EBUSY) + LNKGETD D0Ar2, [D1Ar1] + CMP D0Ar2, #0 + ADD D0Ar2, D0Ar2, #1 + LNKSETDEQ [D1Ar1], D0Ar2 + BNE 2f + DEFR D0Ar2, TXSTAT + ANDT D0Ar2, D0Ar2, #HI(0x3f000000) + CMPT D0Ar2, #HI(0x02000000) + BNZ 1b + MOV D0Re0, #0 +2: MOV PC, D1RtP + .size _pthread_spin_trylock,.-_pthread_spin_trylock |