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sparc64: use generic sub-word atomic *cmpset

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Most of this diff is refactoring to reduce duplication between the different
acq_ and rel_ variants.

Differential Revision:	https://reviews.freebsd.org/D21822
This commit is contained in:
kevans 2019-10-02 17:08:20 +00:00
parent eaa7b450ef
commit 50118a85ed
1 changed files with 69 additions and 0 deletions
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69
sys/sparc64/include/atomic.h
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@ -48,6 +48,11 @@
#define __ASI_ATOMIC ASI_P
#endif
static __inline int atomic_cmpset_8(__volatile uint8_t *, uint8_t, uint8_t);
static __inline int atomic_fcmpset_8(__volatile uint8_t *, uint8_t *, uint8_t);
static __inline int atomic_cmpset_16(__volatile uint16_t *, uint16_t, uint16_t);
static __inline int atomic_fcmpset_16(__volatile uint16_t *, uint16_t *, uint16_t);
/*
* Various simple arithmetic on memory which is atomic in the presence
* of interrupts and multiple processors. See atomic(9) for details.
@ -356,6 +361,68 @@ ATOMIC_GEN(64, uint64_t *, uint64_t, uint64_t, 64);
ATOMIC_GEN(ptr, uintptr_t *, uintptr_t, uintptr_t, 64);
#define ATOMIC_CMPSET_ACQ_REL(WIDTH) \
static __inline int \
atomic_cmpset_acq_##WIDTH(__volatile uint##WIDTH##_t *p, \
uint##WIDTH##_t cmpval, uint##WIDTH##_t newval) \
{ \
int retval; \
\
retval = atomic_cmpset_##WIDTH(p, cmpval, newval); \
mb(); \
return (retval); \
} \
\
static __inline int \
atomic_cmpset_rel_##WIDTH(__volatile uint##WIDTH##_t *p, \
uint##WIDTH##_t cmpval, uint##WIDTH##_t newval) \
{ \
mb(); \
return (atomic_cmpset_##WIDTH(p, cmpval, newval)); \
}
#define ATOMIC_FCMPSET_ACQ_REL(WIDTH) \
static __inline int \
atomic_fcmpset_acq_##WIDTH(__volatile uint##WIDTH##_t *p, \
uint##WIDTH##_t *cmpval, uint##WIDTH##_t newval) \
{ \
int retval; \
\
retval = atomic_fcmpset_##WIDTH(p, cmpval, newval); \
mb(); \
return (retval); \
} \
\
static __inline int \
atomic_fcmpset_rel_##WIDTH(__volatile uint##WIDTH##_t *p, \
uint##WIDTH##_t *cmpval, uint##WIDTH##_t newval) \
{ \
mb(); \
return (atomic_fcmpset_##WIDTH(p, cmpval, newval)); \
}
/*
* Atomically compare the value stored at *p with cmpval and if the
* two values are equal, update the value of *p with newval. Returns
* zero if the compare failed, nonzero otherwise.
*/
ATOMIC_CMPSET_ACQ_REL(8);
ATOMIC_CMPSET_ACQ_REL(16);
ATOMIC_FCMPSET_ACQ_REL(8);
ATOMIC_FCMPSET_ACQ_REL(16);
#define atomic_cmpset_char atomic_cmpset_8
#define atomic_cmpset_acq_char atomic_cmpset_acq_8
#define atomic_cmpset_rel_char atomic_cmpset_rel_8
#define atomic_fcmpset_acq_char atomic_fcmpset_acq_8
#define atomic_fcmpset_rel_char atomic_fcmpset_rel_8
#define atomic_cmpset_short atomic_cmpset_16
#define atomic_cmpset_acq_short atomic_cmpset_acq_16
#define atomic_cmpset_rel_short atomic_cmpset_rel_16
#define atomic_fcmpset_acq_short atomic_fcmpset_acq_16
#define atomic_fcmpset_rel_short atomic_fcmpset_rel_16
#define atomic_fetchadd_int atomic_add_int
#define atomic_fetchadd_32 atomic_add_32
#define atomic_fetchadd_long atomic_add_long
@ -374,4 +441,6 @@ ATOMIC_GEN(ptr, uintptr_t *, uintptr_t, uintptr_t, 64);
#undef atomic_st_acq
#undef atomic_st_rel
#include <sys/_atomic_subword.h>
#endif /* !_MACHINE_ATOMIC_H_ */