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Use atomic intrinsics for loads on ARMv8.3-RCPC with recent gcc and clang.

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gcc 13.1 and clang 16 now generate the ldapr instructions for atomic loads
when ARMv8.3-RCPC or later is enabled. Resorting to inline asm for this
is no longer necessary.
This commit is contained in:
Andrey Semashev
2025-02-22 18:03:43 +03:00
parent 037f686d36
commit 199906f4e1
1 changed files with 2 additions and 1 deletions
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include/boost/atomic/detail/core_ops_gcc_atomic.hpp
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@@ -79,9 +79,10 @@ struct core_operations_gcc_atomic
static BOOST_FORCEINLINE storage_type load(storage_type const volatile& storage, memory_order order) BOOST_NOEXCEPT
{
#if defined(BOOST_ATOMIC_DETAIL_AARCH64_HAS_RCPC)
#if defined(BOOST_ATOMIC_DETAIL_AARCH64_HAS_RCPC) && !((defined(BOOST_GCC) && BOOST_GCC >= 130100) || (defined(BOOST_CLANG) && BOOST_CLANG_VERSION >= 160000))
// At least gcc 9.3 and clang 10 do not generate relaxed ldapr instructions that are available in ARMv8.3-RCPC extension.
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95751
// This was fixed in gcc 13.1 and clang 16.
typedef atomics::detail::core_arch_operations< storage_size, is_signed, is_interprocess > core_arch_operations;
return core_arch_operations::load(storage, order);
#else