整理

include/boost/atomic/detail/gcc_ppc_asm_common.hpp

@@ -0,0 +1,33 @@
+/*
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * Copyright (c) 2021 Andrey Semashev
+ */
+/*!
+ * \file   atomic/detail/gcc_ppc_asm_common.hpp
+ *
+ * This header contains basic utilities for gcc asm-based PowerPC backend.
+ */
+
+#ifndef BOOST_ATOMIC_DETAIL_GCC_PPC_ASM_COMMON_HPP_INCLUDED_
+#define BOOST_ATOMIC_DETAIL_GCC_PPC_ASM_COMMON_HPP_INCLUDED_
+
+#include <boost/atomic/detail/config.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+#if !defined(_AIX)
+#define BOOST_ATOMIC_DETAIL_PPC_ASM_LABEL(label) label ":\n\t"
+#define BOOST_ATOMIC_DETAIL_PPC_ASM_JUMP(insn, label, offset) insn " " label "\n\t"
+#else
+// Standard assembler tool (as) on AIX does not support numeric jump labels, so we have to use offsets instead.
+// https://github.com/boostorg/atomic/pull/50
+#define BOOST_ATOMIC_DETAIL_PPC_ASM_LABEL(label)
+#define BOOST_ATOMIC_DETAIL_PPC_ASM_JUMP(insn, label, offset) insn " $" offset "\n\t"
+#endif
+
+#endif // BOOST_ATOMIC_DETAIL_GCC_PPC_ASM_COMMON_HPP_INCLUDED_