diff options
Diffstat (limited to 'boost/smart_ptr/detail/spinlock_gcc_arm.hpp')
| -rw-r--r-- | boost/smart_ptr/detail/spinlock_gcc_arm.hpp | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/boost/smart_ptr/detail/spinlock_gcc_arm.hpp b/boost/smart_ptr/detail/spinlock_gcc_arm.hpp index f58ea44168..f1bbaf66c6 100644 --- a/boost/smart_ptr/detail/spinlock_gcc_arm.hpp +++ b/boost/smart_ptr/detail/spinlock_gcc_arm.hpp @@ -43,13 +43,38 @@ public: { int r; +#if defined(__ARM_ARCH_6__) \ + || defined(__ARM_ARCH_6J__) \ + || defined(__ARM_ARCH_6K__) \ + || defined(__ARM_ARCH_6Z__) \ + || defined(__ARM_ARCH_6ZK__) \ + || defined(__ARM_ARCH_6T2__) \ + || defined(__ARM_ARCH_7__) \ + || defined(__ARM_ARCH_7A__) \ + || defined(__ARM_ARCH_7R__) \ + || defined(__ARM_ARCH_7M__) \ + || defined(__ARM_ARCH_7EM__) + + __asm__ __volatile__( + "ldrex %0, [%2]; \n" + "cmp %0, %1; \n" + "strexne %0, %1, [%2]; \n" + BOOST_SP_ARM_BARRIER : + "=&r"( r ): // outputs + "r"( 1 ), "r"( &v_ ): // inputs + "memory", "cc" ); + +#else + __asm__ __volatile__( - "swp %0, %1, [%2]\n\t" - BOOST_SP_ARM_BARRIER : + "swp %0, %1, [%2];\n" + BOOST_SP_ARM_BARRIER : "=&r"( r ): // outputs "r"( 1 ), "r"( &v_ ): // inputs "memory", "cc" ); +#endif + return r == 0; } |