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Add more atomic_swap_* functions.

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Obtained from:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
andrew 2015-07-31 13:34:43 +00:00
parent 5bbb70e245
commit 2403c30cf5
1 changed files with 19 additions and 0 deletions
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19
sys/arm64/include/atomic.h
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@ -153,6 +153,22 @@ atomic_set_32(volatile uint32_t *p, uint32_t val)
);
}
static __inline uint32_t
atomic_swap_32(volatile uint32_t *p, uint32_t val)
{
uint32_t tmp;
int res;
__asm __volatile(
"1: ldxr %w0, [%2] \n"
" stxr %w1, %w3, [%2] \n"
" cbnz %w1, 1b \n"
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
);
return (tmp);
}
static __inline void
atomic_subtract_32(volatile uint32_t *p, uint32_t val)
{
@ -174,6 +190,7 @@ atomic_subtract_32(volatile uint32_t *p, uint32_t val)
#define atomic_fetchadd_int atomic_fetchadd_32
#define atomic_readandclear_int atomic_readandclear_32
#define atomic_set_int atomic_set_32
#define atomic_swap_int atomic_swap_32
#define atomic_subtract_int atomic_subtract_32
static __inline void
@ -515,6 +532,7 @@ atomic_swap_64(volatile uint64_t *p, uint64_t val)
#define atomic_fetchadd_long atomic_fetchadd_64
#define atomic_readandclear_long atomic_readandclear_64
#define atomic_set_long atomic_set_64
#define atomic_swap_long atomic_swap_64
#define atomic_subtract_long atomic_subtract_64
#define atomic_add_ptr atomic_add_64
@ -523,6 +541,7 @@ atomic_swap_64(volatile uint64_t *p, uint64_t val)
#define atomic_fetchadd_ptr atomic_fetchadd_64
#define atomic_readandclear_ptr atomic_readandclear_64
#define atomic_set_ptr atomic_set_64
#define atomic_swap_ptr atomic_swap_64
#define atomic_subtract_ptr atomic_subtract_64
static __inline void