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| author | mjg <mjg@FreeBSD.org> | 2017-03-16 06:00:27 +0000 |
|---|---|---|
| committer | mjg <mjg@FreeBSD.org> | 2017-03-16 06:00:27 +0000 |
| commit | b8af6b78be197b6a24bf372442dcb6e044d729b3 (patch) | |
| tree | 0496f4e01ec297971a9b02afb62b80c63b0dd969 /sys/sparc64 | |
| parent | 3100d6f6dfd7bea82a2fe7136cf72d8423b715bd (diff) | |
| download | FreeBSD-src-b8af6b78be197b6a24bf372442dcb6e044d729b3.zip FreeBSD-src-b8af6b78be197b6a24bf372442dcb6e044d729b3.tar.gz | |
MFC r311169,r311898,r312925,r312973,r312975,r313007,r313040,r313080,
r313254,r313341
amd64: add atomic_fcmpset
==
sparc64: add atomic_fcmpset
==
Implement atomic_fcmpset_* for arm and arm64.
==
Add atomic_fcmpset_*() inlines for powerpc
Summary:
atomic_fcmpset_*() is analogous to atomic_cmpset(), but saves off the read value
from the target memory location into the 'old' pointer in the case of failure.
==
i386: add atomic_fcmpset
==
Don't retry a lost reservation in atomic_fcmpset()
The desired behavior of atomic_fcmpset_() is to always exit on error. Instead
of retrying on lost reservation, leave the retry to the caller, and return
==
Add atomic_fcmpset_*() inlines for MIPS
atomic_fcmpset_*() is analogous to atomic_cmpset(), but saves off the
read value from the target memory location into the 'old' pointer.
==
i386: fixup fcmpset
An incorrect output specifier was used which worked with clang by accident,
but breaks with the in-tree gcc version.
While here plug a whitespace nit.
==
Implement atomic_fcmpset_*() for RISC-V.
==
Use 64bit store instruction in atomic_fcmpset_64.
Diffstat (limited to 'sys/sparc64')
| -rw-r--r-- | sys/sparc64/include/atomic.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/sys/sparc64/include/atomic.h b/sys/sparc64/include/atomic.h index c70e99a..b2fd8cc 100644 --- a/sys/sparc64/include/atomic.h +++ b/sys/sparc64/include/atomic.h @@ -219,6 +219,40 @@ atomic_cmpset_rel_ ## name(volatile ptype p, vtype e, vtype s) \ return (((vtype)atomic_cas_rel((p), (e), (s), sz)) == (e)); \ } \ \ +static __inline int \ +atomic_fcmpset_ ## name(volatile ptype p, vtype *ep, vtype s) \ +{ \ + vtype t; \ + \ + t = (vtype)atomic_cas((p), (*ep), (s), sz); \ + if (t == (*ep)) \ + return (1); \ + *ep = t; \ + return (0); \ +} \ +static __inline int \ +atomic_fcmpset_acq_ ## name(volatile ptype p, vtype *ep, vtype s) \ +{ \ + vtype t; \ + \ + t = (vtype)atomic_cas_acq((p), (*ep), (s), sz); \ + if (t == (*ep)) \ + return (1); \ + *ep = t; \ + return (0); \ +} \ +static __inline int \ +atomic_fcmpset_rel_ ## name(volatile ptype p, vtype *ep, vtype s) \ +{ \ + vtype t; \ + \ + t = (vtype)atomic_cas_rel((p), (*ep), (s), sz); \ + if (t == (*ep)) \ + return (1); \ + *ep = t; \ + return (0); \ +} \ + \ static __inline vtype \ atomic_load_ ## name(volatile ptype p) \ { \ |
