d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Work around clang emitting libcalls to __atomic_add_fetch() and friends

Browse Source 
in libc++, on __ARM_ARCH < 6.  Additionally, supply the missing stub
__libcpp_relaxed_store(), as proposed in http://reviews.llvm.org/D13051

NOTE: this needs to be fixed properly later on, by supplying library
functions implementing atomic operations for arm < v6.  We should
probably take those from sys/arm/arm/stdatomic.c, and stuff them into
either libgcc or compiler-rt.
This commit is contained in:
Dimitry Andric 2015-09-22 17:34:51 +00:00
parent 883df6251d
commit bedee6b9f0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/projects/clang370-import/; revision=288121
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
contrib/libc++/src/support/atomic_support.h
View File

@ -13,7 +13,8 @@
&& defined(__ATOMIC_ACQUIRE) \
&& defined(__ATOMIC_RELEASE) \
&& defined(__ATOMIC_ACQ_REL) \
&& defined(__ATOMIC_SEQ_CST)
&& defined(__ATOMIC_SEQ_CST) \
&& defined(__ARM_ARCH) && __ARM_ARCH >= 6
# define _LIBCPP_HAS_ATOMIC_BUILTINS
#elif !defined(__clang__) && defined(_GNUC_VER) && _GNUC_VER >= 407
# define _LIBCPP_HAS_ATOMIC_BUILTINS
@ -103,6 +104,13 @@ void __libcpp_atomic_store(_ValueType* __dest, _FromType __val,
*__dest = __val;
}
template <class _ValueType, class _FromType>
inline _LIBCPP_INLINE_VISIBILITY
void __libcpp_relaxed_store(_ValueType* __dest, _FromType __val)
{
*__dest = __val;
}
template <class _ValueType>
inline _LIBCPP_INLINE_VISIBILITY
_ValueType __libcpp_atomic_load(_ValueType const* __val,