diff options
Diffstat (limited to 'lib/librte_eal/common/include/arch/x86/rte_atomic.h')
| -rw-r--r-- | lib/librte_eal/common/include/arch/x86/rte_atomic.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/librte_eal/common/include/arch/x86/rte_atomic.h b/lib/librte_eal/common/include/arch/x86/rte_atomic.h index 5cfd3832..148398f5 100644 --- a/lib/librte_eal/common/include/arch/x86/rte_atomic.h +++ b/lib/librte_eal/common/include/arch/x86/rte_atomic.h @@ -104,6 +104,18 @@ rte_atomic16_cmpset(volatile uint16_t *dst, uint16_t exp, uint16_t src) return res; } +static inline uint16_t +rte_atomic16_exchange(volatile uint16_t *dst, uint16_t val) +{ + asm volatile( + MPLOCKED + "xchgw %0, %1;" + : "=r" (val), "=m" (*dst) + : "0" (val), "m" (*dst) + : "memory"); /* no-clobber list */ + return val; +} + static inline int rte_atomic16_test_and_set(rte_atomic16_t *v) { return rte_atomic16_cmpset((volatile uint16_t *)&v->cnt, 0, 1); @@ -178,6 +190,18 @@ rte_atomic32_cmpset(volatile uint32_t *dst, uint32_t exp, uint32_t src) return res; } +static inline uint32_t +rte_atomic32_exchange(volatile uint32_t *dst, uint32_t val) +{ + asm volatile( + MPLOCKED + "xchgl %0, %1;" + : "=r" (val), "=m" (*dst) + : "0" (val), "m" (*dst) + : "memory"); /* no-clobber list */ + return val; +} + static inline int rte_atomic32_test_and_set(rte_atomic32_t *v) { return rte_atomic32_cmpset((volatile uint32_t *)&v->cnt, 0, 1); |