diff options
Diffstat (limited to 'src/atomic_ptr.hpp')
| -rw-r--r-- | src/atomic_ptr.hpp | 58 |
1 files changed, 29 insertions, 29 deletions
diff --git a/src/atomic_ptr.hpp b/src/atomic_ptr.hpp index 08418d3..adf1c87 100644 --- a/src/atomic_ptr.hpp +++ b/src/atomic_ptr.hpp @@ -70,7 +70,22 @@ namespace xs // to the 'val' value. Old value is returned. inline T *xchg (T *val_) { -#if defined(XS_ATOMIC_GCC_SYNC) +#if (defined(__GNUC__) && defined(__ARM_ARCH_7A__)) + T* old; + unsigned int flag; + __asm__ volatile ( + " dmb sy\n\t" + "1: ldrex %1, [%3]\n\t" + " strex %0, %4, [%3]\n\t" + " teq %0, #0\n\t" + " bne 1b\n\t" + " dmb sy\n\t" + : "=&r"(flag), "=&r"(old), "+Qo"(ptr) + : "r"(&ptr), "r"(val_) + : "cc"); + return old; + +#elif defined(XS_ATOMIC_GCC_SYNC) { T* ov; do @@ -88,21 +103,6 @@ namespace xs : "m" (ptr), "0" (val_)); return old; -#elif (defined(__GNUC__) && defined(__ARM_ARCH_7A__)) - T* old; - unsigned int flag; - __asm__ volatile ( - " dmb sy\n\t" - "1: ldrex %1, [%3]\n\t" - " strex %0, %4, [%3]\n\t" - " teq %0, #0\n\t" - " bne 1b\n\t" - " dmb sy\n\t" - : "=&r"(flag), "=&r"(old), "+Qo"(ptr) - : "r"(&ptr), "r"(val_) - : "cc"); - return old; - #elif defined(XS_ATOMIC_SOLARIS) return (T*) atomic_swap_ptr (&ptr, val_); @@ -124,19 +124,7 @@ namespace xs // is returned. inline T *cas (T *cmp_, T *val_) { -#if defined(XS_ATOMIC_GCC_SYNC) - return (T*) __sync_val_compare_and_swap (&ptr, cmp_, val_); - -#elif (defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))) - T *old; - __asm__ volatile ( - "lock; cmpxchg %2, %3" - : "=a" (old), "=m" (ptr) - : "r" (val_), "m" (ptr), "0" (cmp_) - : "cc"); - return old; - -#elif (defined(__GNUC__) && defined(__ARM_ARCH_7A__)) +#if (defined(__GNUC__) && defined(__ARM_ARCH_7A__)) T *old; unsigned int flag; __asm__ volatile ( @@ -153,6 +141,18 @@ namespace xs : "cc"); return old; +#elif defined(XS_ATOMIC_GCC_SYNC) + return (T*) __sync_val_compare_and_swap (&ptr, cmp_, val_); + +#elif (defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))) + T *old; + __asm__ volatile ( + "lock; cmpxchg %2, %3" + : "=a" (old), "=m" (ptr) + : "r" (val_), "m" (ptr), "0" (cmp_) + : "cc"); + return old; + #elif defined(XS_ATOMIC_SOLARIS) return (T*) atomic_cas_ptr (&ptr, cmp_, val_); |