Imported Upstream version 1.65.0upstream/1.65.0

Change-Id: Icf8400b375482cb11bcf77440a6934ba360d6ba4
Signed-off-by: DongHun Kwak <dh0128.kwak@samsung.com>

1 files changed, 94 insertions, 0 deletions

diff --git a/boost/fiber/detail/rtm.hpp b/boost/fiber/detail/rtm.hpp
new file mode 100644
index 0000000000..5188b0d216
--- /dev/null
+++ b/boost/fiber/detail/rtm.hpp
@@ -0,0 +1,94 @@
+
+//          Copyright Oliver Kowalke 2017.
+// 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)
+//
+
+#ifndef BOOST_FIBER_DETAIL_RTM_H
+#define BOOST_FIBER_DETAIL_RTM_H
+
+#include <cstdint>
+
+#include <boost/assert.hpp>
+#include <boost/config.hpp>
+
+#include <boost/fiber/detail/config.hpp>
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_PREFIX
+#endif
+
+namespace boost {
+namespace fibers {
+namespace detail {
+
+struct rtm_status {
+    enum {
+        none            = 0,
+        explicit_abort  = 1 << 0,
+        may_retry       = 1 << 1,
+        memory_conflict = 1 << 2,
+        buffer_overflow = 1 << 3,
+        debug_hit       = 1 << 4,
+        nested_abort    = 1 << 5
+    };
+
+    static constexpr std::uint32_t success = ~std::uint32_t{ 0 };
+};
+
+static BOOST_FORCEINLINE
+std::uint32_t rtm_begin() noexcept {
+    std::uint32_t result = rtm_status::success;
+    __asm__ __volatile__
+    (
+        ".byte 0xc7,0xf8 ; .long 0"
+        : "+a" (result)
+        :
+        : "memory"
+    );
+    return result;
+}
+
+static BOOST_FORCEINLINE
+void rtm_end() noexcept {
+    __asm__ __volatile__
+    (
+        ".byte 0x0f,0x01,0xd5"
+        :
+        :
+        : "memory"
+    );
+}
+
+static BOOST_FORCEINLINE
+void rtm_abort_lock_not_free() noexcept {
+    __asm__ __volatile__
+    (
+        ".byte 0xc6,0xf8,0xff"
+        :
+        :
+        : "memory"
+    );
+}
+
+static BOOST_FORCEINLINE
+bool rtm_test() noexcept {
+    bool result;
+    __asm__ __volatile__
+    (
+        ".byte 0x0f,0x01,0xd6; setz %0"
+        : "=q" (result)
+        :
+        : "memory"
+    );
+    return result;
+}
+
+}}}
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_SUFFIX
+#endif
+
+#endif // BOOST_FIBER_DETAIL_RTM_H