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i386: add atomic_fcmpset

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Tested by:	pho
This commit is contained in:
Mateusz Guzik 2017-01-30 02:24:54 +00:00
parent 0624255394
commit e7a98aef79
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=312975
1 changed files with 34 additions and 0 deletions
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34
sys/i386/include/atomic.h
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@ -106,6 +106,7 @@ void atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v); \
void atomic_##NAME##_barr_##TYPE(volatile u_##TYPE *p, u_##TYPE v)
int atomic_cmpset_int(volatile u_int *dst, u_int expect, u_int src);
int atomic_fcmpset_int(volatile u_int *dst, u_int *expect, u_int src);
u_int atomic_fetchadd_int(volatile u_int *p, u_int v);
int atomic_testandset_int(volatile u_int *p, u_int v);
int atomic_testandclear_int(volatile u_int *p, u_int v);
@ -214,6 +215,24 @@ atomic_cmpset_int(volatile u_int *dst, u_int expect, u_int src)
return (res);
}
static __inline int
atomic_fcmpset_int(volatile u_int *dst, u_int *expect, u_int src)
{
u_char res;
__asm __volatile(
" " MPLOCKED " "
" cmpxchgl %3,%1 ; "
" sete %0 ; "
"# atomic_cmpset_int"
: "=r" (res), /* 0 */
"+m" (*dst), /* 1 */
"+a" (*expect) /* 2 */
: "r" (src) /* 3 */
: "memory", "cc");
return (res);
}
#endif /* CPU_DISABLE_CMPXCHG */
/*
@ -684,6 +703,8 @@ u_long atomic_swap_long(volatile u_long *p, u_long v);
#define atomic_subtract_rel_int atomic_subtract_barr_int
#define atomic_cmpset_acq_int atomic_cmpset_int
#define atomic_cmpset_rel_int atomic_cmpset_int
#define atomic_fcmpset_acq_int atomic_fcmpset_int
#define atomic_fcmpset_rel_int atomic_fcmpset_int
#define atomic_set_acq_long atomic_set_barr_long
#define atomic_set_rel_long atomic_set_barr_long
@ -695,6 +716,8 @@ u_long atomic_swap_long(volatile u_long *p, u_long v);
#define atomic_subtract_rel_long atomic_subtract_barr_long
#define atomic_cmpset_acq_long atomic_cmpset_long
#define atomic_cmpset_rel_long atomic_cmpset_long
#define atomic_fcmpset_acq_long atomic_fcmpset_long
#define atomic_fcmpset_rel_long atomic_fcmpset_long
#define atomic_readandclear_int(p) atomic_swap_int(p, 0)
#define atomic_readandclear_long(p) atomic_swap_long(p, 0)
@ -749,6 +772,9 @@ u_long atomic_swap_long(volatile u_long *p, u_long v);
#define atomic_cmpset_32 atomic_cmpset_int
#define atomic_cmpset_acq_32 atomic_cmpset_acq_int
#define atomic_cmpset_rel_32 atomic_cmpset_rel_int
#define atomic_fcmpset_32 atomic_fcmpset_int
#define atomic_fcmpset_acq_32 atomic_fcmpset_acq_int
#define atomic_fcmpset_rel_32 atomic_fcmpset_rel_int
#define atomic_swap_32 atomic_swap_int
#define atomic_readandclear_32 atomic_readandclear_int
#define atomic_fetchadd_32 atomic_fetchadd_int
@ -792,6 +818,14 @@ u_long atomic_swap_long(volatile u_long *p, u_long v);
#define atomic_cmpset_rel_ptr(dst, old, new) \
atomic_cmpset_rel_int((volatile u_int *)(dst), (u_int)(old), \
(u_int)(new))
#define atomic_fcmpset_ptr(dst, old, new) \
atomic_fcmpset_int((volatile u_int *)(dst), (u_int *)(old), (u_int)(new))
#define atomic_fcmpset_acq_ptr(dst, old, new) \
atomic_fcmpset_acq_int((volatile u_int *)(dst), (u_int *)(old), \
(u_int)(new))
#define atomic_fcmpset_rel_ptr(dst, old, new) \
atomic_fcmpset_rel_int((volatile u_int *)(dst), (u_int *)(old), \
(u_int)(new))
#define atomic_swap_ptr(p, v) \
atomic_swap_int((volatile u_int *)(p), (u_int)(v))
#define atomic_readandclear_ptr(p) \