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arm64: Add atomic_fcmpset_8 and atomic_fcmpset_16

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Reviewed by:	cognet
This commit is contained in:
Emmanuel Vadot 2018-05-28 20:29:03 +00:00
parent cfa989aa34
commit e39ce4cafb
1 changed files with 48 additions and 0 deletions
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48
sys/arm64/include/atomic.h
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@ -102,6 +102,54 @@ ATOMIC(subtract, sub)
#define ATOMIC_FCMPSET(bar, a, l) \
static __inline int \
atomic_fcmpset_##bar##8(volatile uint8_t *p, uint8_t *cmpval, \
uint8_t newval) \
{ \
uint8_t tmp; \
uint8_t _cmpval = *cmpval; \
int res; \
\
__asm __volatile( \
"1: mov %w1, #1 \n" \
" ld"#a"xrb %w0, [%2] \n" \
" cmp %w0, %w3 \n" \
" b.ne 2f \n" \
" st"#l"xrb %w1, %w4, [%2]\n" \
"2:" \
: "=&r"(tmp), "=&r"(res) \
: "r" (p), "r" (_cmpval), "r" (newval) \
: "cc", "memory" \
); \
*cmpval = tmp; \
\
return (!res); \
} \
\
static __inline int \
atomic_fcmpset_##bar##16(volatile uint16_t *p, uint16_t *cmpval, \
uint8_t newval) \
{ \
uint16_t tmp; \
uint16_t _cmpval = *cmpval; \
int res; \
\
__asm __volatile( \
"1: mov %w1, #1 \n" \
" ld"#a"xh %w0, [%2] \n" \
" cmp %w0, %w3 \n" \
" b.ne 2f \n" \
" st"#l"xh %w1, %w4, [%2] \n" \
"2:" \
: "=&r"(tmp), "=&r"(res) \
: "r" (p), "r" (_cmpval), "r" (newval) \
: "cc", "memory" \
); \
*cmpval = tmp; \
\
return (!res); \
} \
\
static __inline int \
atomic_fcmpset_##bar##32(volatile uint32_t *p, uint32_t *cmpval, \
uint32_t newval) \
{ \