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| author | Serban Constantinescu <serban.constantinescu@arm.com> | 2013-12-19 11:46:17 +0000 |
|---|---|---|
| committer | David Butcher <david.butcher@arm.com> | 2013-12-19 18:32:53 +0000 |
| commit | bf3ec9ad52a5ccaccdae843a94f964f3a7624ecd (patch) | |
| tree | 61952ac46346f7149c5b2694b5341978262bbe74 /libc/malloc_hooks/tests/malloc_hooks_tests.cpp | |
| parent | 81ddd14381b09f171c006ebcbba15b3c1baf2a9f (diff) | |
AArch64: Use LDXR/STXR instead of LDAXR/STLXR for bionic_atomic_cmpxchg()
The bionic_atomic_cmpxchg() API states that the cmpxchg() will be done without
explicit memory barriers. LDAXR/STLXR semantics involve half barriers for
load/store.
This patch optimises cmpxchg() by using LDXR/STXR and avoiding unnecessary half
bariers. It also fixes the clobber list for all the bionic_atomic_*() functions.
Change-Id: Iae9468965785cfeeec791d52f1e8cbc524adb682
Signed-off-by: Serban Constantinescu <serban.constantinescu@arm.com>
Diffstat (limited to 'libc/malloc_hooks/tests/malloc_hooks_tests.cpp')
0 files changed, 0 insertions, 0 deletions