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Implement atomic_fcmpset_*() for RISC-V.

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Requested by: mjg
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D9447
This commit is contained in:
Ruslan Bukin 2017-02-05 00:32:12 +00:00
parent 9bb564c862
commit 43b595f6a5
1 changed files with 101 additions and 0 deletions
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101
sys/riscv/include/atomic.h
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@ -120,6 +120,31 @@ atomic_cmpset_32(volatile uint32_t *p, uint32_t cmpval, uint32_t newval)
return (!res);
}
static __inline int
atomic_fcmpset_32(volatile uint32_t *p, uint32_t *cmpval, uint32_t newval)
{
uint32_t tmp;
int res;
res = 0;
__asm __volatile(
"0:"
"li %1, 1\n" /* Preset to fail */
"lr.w %0, %2\n" /* Load old value */
"bne %0, %z4, 1f\n" /* Compare */
"sc.w %1, %z5, %2\n" /* Try to store new value */
"j 2f\n"
"1:"
"sw %0, %3\n" /* Save old value */
"2:"
: "=&r" (tmp), "=&r" (res), "+A" (*p), "+A" (*cmpval)
: "rJ" (*cmpval), "rJ" (newval)
: "memory");
return (!res);
}
static __inline uint32_t
atomic_fetchadd_32(volatile uint32_t *p, uint32_t val)
{
@ -152,6 +177,7 @@ atomic_readandclear_32(volatile uint32_t *p)
#define atomic_add_int atomic_add_32
#define atomic_clear_int atomic_clear_32
#define atomic_cmpset_int atomic_cmpset_32
#define atomic_fcmpset_int atomic_fcmpset_32
#define atomic_fetchadd_int atomic_fetchadd_32
#define atomic_readandclear_int atomic_readandclear_32
#define atomic_set_int atomic_set_32
@ -183,6 +209,27 @@ atomic_cmpset_rel_32(volatile uint32_t *p, uint32_t cmpval, uint32_t newval)
return (atomic_cmpset_32(p, cmpval, newval));
}
static __inline int
atomic_fcmpset_acq_32(volatile uint32_t *p, uint32_t *cmpval, uint32_t newval)
{
int res;
res = atomic_fcmpset_32(p, cmpval, newval);
fence();
return (res);
}
static __inline int
atomic_fcmpset_rel_32(volatile uint32_t *p, uint32_t *cmpval, uint32_t newval)
{
fence();
return (atomic_fcmpset_32(p, cmpval, newval));
}
static __inline uint32_t
atomic_load_acq_32(volatile uint32_t *p)
{
@ -207,6 +254,7 @@ atomic_store_rel_32(volatile uint32_t *p, uint32_t val)
#define atomic_add_acq_int atomic_add_acq_32
#define atomic_clear_acq_int atomic_clear_acq_32
#define atomic_cmpset_acq_int atomic_cmpset_acq_32
#define atomic_fcmpset_acq_int atomic_fcmpset_acq_32
#define atomic_load_acq_int atomic_load_acq_32
#define atomic_set_acq_int atomic_set_acq_32
#define atomic_subtract_acq_int atomic_subtract_acq_32
@ -214,6 +262,7 @@ atomic_store_rel_32(volatile uint32_t *p, uint32_t val)
#define atomic_add_rel_int atomic_add_rel_32
#define atomic_clear_rel_int atomic_add_rel_32
#define atomic_cmpset_rel_int atomic_cmpset_rel_32
#define atomic_fcmpset_rel_int atomic_fcmpset_rel_32
#define atomic_set_rel_int atomic_set_rel_32
#define atomic_subtract_rel_int atomic_subtract_rel_32
#define atomic_store_rel_int atomic_store_rel_32
@ -281,6 +330,31 @@ atomic_cmpset_64(volatile uint64_t *p, uint64_t cmpval, uint64_t newval)
return (!res);
}
static __inline int
atomic_fcmpset_64(volatile uint64_t *p, uint64_t *cmpval, uint64_t newval)
{
uint64_t tmp;
int res;
res = 0;
__asm __volatile(
"0:"
"li %1, 1\n" /* Preset to fail */
"lr.d %0, %2\n" /* Load old value */
"bne %0, %z4, 1f\n" /* Compare */
"sc.d %1, %z5, %2\n" /* Try to store new value */
"j 2f\n"
"1:"
"sd %0, %3\n" /* Save old value */
"2:"
: "=&r" (tmp), "=&r" (res), "+A" (*p), "+A" (*cmpval)
: "rJ" (*cmpval), "rJ" (newval)
: "memory");
return (!res);
}
static __inline uint64_t
atomic_fetchadd_64(volatile uint64_t *p, uint64_t val)
{
@ -339,6 +413,7 @@ atomic_swap_64(volatile uint64_t *p, uint64_t val)
#define atomic_add_long atomic_add_64
#define atomic_clear_long atomic_clear_64
#define atomic_cmpset_long atomic_cmpset_64
#define atomic_fcmpset_long atomic_fcmpset_64
#define atomic_fetchadd_long atomic_fetchadd_64
#define atomic_readandclear_long atomic_readandclear_64
#define atomic_set_long atomic_set_64
@ -347,6 +422,7 @@ atomic_swap_64(volatile uint64_t *p, uint64_t val)
#define atomic_add_ptr atomic_add_64
#define atomic_clear_ptr atomic_clear_64
#define atomic_cmpset_ptr atomic_cmpset_64
#define atomic_fcmpset_ptr atomic_fcmpset_64
#define atomic_fetchadd_ptr atomic_fetchadd_64
#define atomic_readandclear_ptr atomic_readandclear_64
#define atomic_set_ptr atomic_set_64
@ -378,6 +454,27 @@ atomic_cmpset_rel_64(volatile uint64_t *p, uint64_t cmpval, uint64_t newval)
return (atomic_cmpset_64(p, cmpval, newval));
}
static __inline int
atomic_fcmpset_acq_64(volatile uint64_t *p, uint64_t *cmpval, uint64_t newval)
{
int res;
res = atomic_fcmpset_64(p, cmpval, newval);
fence();
return (res);
}
static __inline int
atomic_fcmpset_rel_64(volatile uint64_t *p, uint64_t *cmpval, uint64_t newval)
{
fence();
return (atomic_fcmpset_64(p, cmpval, newval));
}
static __inline uint64_t
atomic_load_acq_64(volatile uint64_t *p)
{
@ -402,6 +499,7 @@ atomic_store_rel_64(volatile uint64_t *p, uint64_t val)
#define atomic_add_acq_long atomic_add_acq_64
#define atomic_clear_acq_long atomic_add_acq_64
#define atomic_cmpset_acq_long atomic_cmpset_acq_64
#define atomic_fcmpset_acq_long atomic_fcmpset_acq_64
#define atomic_load_acq_long atomic_load_acq_64
#define atomic_set_acq_long atomic_set_acq_64
#define atomic_subtract_acq_long atomic_subtract_acq_64
@ -409,6 +507,7 @@ atomic_store_rel_64(volatile uint64_t *p, uint64_t val)
#define atomic_add_acq_ptr atomic_add_acq_64
#define atomic_clear_acq_ptr atomic_add_acq_64
#define atomic_cmpset_acq_ptr atomic_cmpset_acq_64
#define atomic_fcmpset_acq_ptr atomic_fcmpset_acq_64
#define atomic_load_acq_ptr atomic_load_acq_64
#define atomic_set_acq_ptr atomic_set_acq_64
#define atomic_subtract_acq_ptr atomic_subtract_acq_64
@ -447,6 +546,7 @@ atomic_thread_fence_seq_cst(void)
#define atomic_add_rel_long atomic_add_rel_64
#define atomic_clear_rel_long atomic_clear_rel_64
#define atomic_cmpset_rel_long atomic_cmpset_rel_64
#define atomic_fcmpset_rel_long atomic_fcmpset_rel_64
#define atomic_set_rel_long atomic_set_rel_64
#define atomic_subtract_rel_long atomic_subtract_rel_64
#define atomic_store_rel_long atomic_store_rel_64
@ -454,6 +554,7 @@ atomic_thread_fence_seq_cst(void)
#define atomic_add_rel_ptr atomic_add_rel_64
#define atomic_clear_rel_ptr atomic_clear_rel_64
#define atomic_cmpset_rel_ptr atomic_cmpset_rel_64
#define atomic_fcmpset_rel_ptr atomic_fcmpset_rel_64
#define atomic_set_rel_ptr atomic_set_rel_64
#define atomic_subtract_rel_ptr atomic_subtract_rel_64
#define atomic_store_rel_ptr atomic_store_rel_64