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| author | Ivan Maidanski <ivmai@mail.ru> | 2013-05-26 17:16:20 +0400 |
|---|---|---|
| committer | Ivan Maidanski <ivmai@mail.ru> | 2013-05-26 17:16:20 +0400 |
| commit | 4399344775ac5986778c541e3c65f08ae1b4543a (patch) | |
| tree | f5fe379d10c67fa2ae641d89a3bda3942f327ae7 | |
| parent | 25e83ad7a05407142af78ef4e9155ba3ba07176b (diff) | |
Add comment about store_full implementation for x86
* src/atomic_ops/sysdeps/gcc/x86.h: Add comment about AO_store_full
generalization.
| -rw-r--r-- | src/atomic_ops/sysdeps/gcc/x86.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/atomic_ops/sysdeps/gcc/x86.h b/src/atomic_ops/sysdeps/gcc/x86.h index 62b50c9..db66dda 100644 --- a/src/atomic_ops/sysdeps/gcc/x86.h +++ b/src/atomic_ops/sysdeps/gcc/x86.h @@ -114,6 +114,10 @@ AO_short_fetch_and_add_full (volatile unsigned short *p, unsigned short incr) : "memory"); } # define AO_HAVE_xor_full + + /* AO_store_full could be implemented directly using "xchg" but it */ + /* could be generalized efficiently as an ordinary store accomplished */ + /* with AO_nop_full ("mfence" instruction). */ #endif /* !AO_PREFER_GENERALIZED */ AO_INLINE AO_TS_VAL_t |