Date: Tue, 29 May 2018 11:59:02 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r334320 - in head/sys: cddl/compat/opensolaris/kern cddl/compat/opensolaris/sys i386/include Message-ID: <201805291159.w4TBx3e5085835@repo.freebsd.org>
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Author: hselasky Date: Tue May 29 11:59:02 2018 New Revision: 334320 URL: https://svnweb.freebsd.org/changeset/base/334320 Log: Implement atomic_add_64() and atomic_subtract_64() for the i386 target. While at it add missing _acq_ and _rel_ variants for 64-bit atomic operations under i386. Reviewed by: kib @ MFC after: 1 week Sponsored by: Mellanox Technologies Modified: head/sys/cddl/compat/opensolaris/kern/opensolaris_atomic.c head/sys/cddl/compat/opensolaris/sys/atomic.h head/sys/i386/include/atomic.h Modified: head/sys/cddl/compat/opensolaris/kern/opensolaris_atomic.c ============================================================================== --- head/sys/cddl/compat/opensolaris/kern/opensolaris_atomic.c Tue May 29 10:29:43 2018 (r334319) +++ head/sys/cddl/compat/opensolaris/kern/opensolaris_atomic.c Tue May 29 11:59:02 2018 (r334320) @@ -52,7 +52,8 @@ atomic_init(void) } #endif -#if !defined(__LP64__) && !defined(__mips_n32) && !defined(ARM_HAVE_ATOMIC64) +#if !defined(__LP64__) && !defined(__mips_n32) && \ + !defined(ARM_HAVE_ATOMIC64) && !defined(__i386__) void atomic_add_64(volatile uint64_t *target, int64_t delta) { Modified: head/sys/cddl/compat/opensolaris/sys/atomic.h ============================================================================== --- head/sys/cddl/compat/opensolaris/sys/atomic.h Tue May 29 10:29:43 2018 (r334319) +++ head/sys/cddl/compat/opensolaris/sys/atomic.h Tue May 29 11:59:02 2018 (r334320) @@ -36,7 +36,8 @@ atomic_cmpset_ptr((volatile uintptr_t *)(_a), (uintptr_t)(_b), (uintptr_t) (_c)) #define cas32 atomic_cmpset_32 -#if !defined(__LP64__) && !defined(__mips_n32) && !defined(ARM_HAVE_ATOMIC64) +#if !defined(__LP64__) && !defined(__mips_n32) && \ + !defined(ARM_HAVE_ATOMIC64) && !defined(__i386__) extern void atomic_add_64(volatile uint64_t *target, int64_t delta); extern void atomic_dec_64(volatile uint64_t *target); #endif @@ -85,7 +86,8 @@ atomic_dec_32_nv(volatile uint32_t *target) return (atomic_fetchadd_32(target, -1) - 1); } -#if defined(__LP64__) || defined(__mips_n32) || defined(ARM_HAVE_ATOMIC64) +#if defined(__LP64__) || defined(__mips_n32) || \ + defined(ARM_HAVE_ATOMIC64) || defined(__i386__) static __inline void atomic_dec_64(volatile uint64_t *target) { Modified: head/sys/i386/include/atomic.h ============================================================================== --- head/sys/i386/include/atomic.h Tue May 29 10:29:43 2018 (r334319) +++ head/sys/i386/include/atomic.h Tue May 29 11:59:02 2018 (r334320) @@ -134,6 +134,8 @@ uint64_t atomic_load_acq_64(volatile uint64_t *); void atomic_store_rel_64(volatile uint64_t *, uint64_t); uint64_t atomic_swap_64(volatile uint64_t *, uint64_t); uint64_t atomic_fetchadd_64(volatile uint64_t *, uint64_t); +void atomic_add_64(volatile uint64_t *, uint64_t); +void atomic_subtract_64(volatile uint64_t *, uint64_t); #else /* !KLD_MODULE && __GNUCLIKE_ASM */ @@ -581,6 +583,30 @@ atomic_fetchadd_64(volatile uint64_t *p, uint64_t v) } } +static __inline void +atomic_add_64(volatile uint64_t *p, uint64_t v) +{ + uint64_t t; + + for (;;) { + t = *p; + if (atomic_cmpset_64(p, t, t + v)) + break; + } +} + +static __inline void +atomic_subtract_64(volatile uint64_t *p, uint64_t v) +{ + uint64_t t; + + for (;;) { + t = *p; + if (atomic_cmpset_64(p, t, t - v)) + break; + } +} + #endif /* _KERNEL */ #endif /* KLD_MODULE || !__GNUCLIKE_ASM */ @@ -804,6 +830,16 @@ u_long atomic_swap_long(volatile u_long *p, u_long v); #define atomic_fetchadd_32 atomic_fetchadd_int #define atomic_testandset_32 atomic_testandset_int #define atomic_testandclear_32 atomic_testandclear_int + +/* Operations on 64-bit quad words. */ +#define atomic_cmpset_acq_64 atomic_cmpset_64 +#define atomic_cmpset_rel_64 atomic_cmpset_64 +#define atomic_fetchadd_acq_64 atomic_fetchadd_64 +#define atomic_fetchadd_rel_64 atomic_fetchadd_64 +#define atomic_add_acq_64 atomic_add_64 +#define atomic_add_rel_64 atomic_add_64 +#define atomic_subtract_acq_64 atomic_subtract_64 +#define atomic_subtract_rel_64 atomic_subtract_64 /* Operations on pointers. */ #define atomic_set_ptr(p, v) \
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