projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /* |
| 2 | * Distributed under the Boost Software License, Version 1.0. | |
| 3 | * (See accompanying file LICENSE_1_0.txt or copy at | |
| 4 | * http://www.boost.org/LICENSE_1_0.txt) | |
| 5 | * | |
| 6 | * Copyright (c) 2009 Helge Bahmann | |
| 7 | * Copyright (c) 2009 Phil Endecott | |
| 8 | * Copyright (c) 2013 Tim Blechmann | |
| 9 | * ARM Code by Phil Endecott, based on other architectures. | |
| 10 | * Copyright (c) 2014 Andrey Semashev | |
| 11 | */ | |
| 12 | /*! | |
| 13 | * \file atomic/detail/caps_gcc_arm.hpp | |
| 14 | * | |
| 15 | * This header defines feature capabilities macros | |
| 16 | */ | |
| 17 | ||
| 18 | #ifndef BOOST_ATOMIC_DETAIL_CAPS_GCC_ARM_HPP_INCLUDED_ | |
| 19 | #define BOOST_ATOMIC_DETAIL_CAPS_GCC_ARM_HPP_INCLUDED_ | |
| 20 | ||
| 21 | #include <boost/atomic/detail/config.hpp> | |
| 22 | ||
| 23 | #ifdef BOOST_HAS_PRAGMA_ONCE | |
| 24 | #pragma once | |
| 25 | #endif | |
| 26 | ||
| 27 | #if !(defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)) | |
| 28 | // ARMv7 and later have dmb instruction | |
| 29 | #define BOOST_ATOMIC_DETAIL_ARM_HAS_DMB 1 | |
| 30 | #endif | |
| 31 | ||
| 32 | #if !(defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6Z__)) | |
| 33 | // ARMv6k and ARMv7 have 8 and 16 ldrex/strex variants | |
| 34 | #define BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXB_STREXB 1 | |
| 35 | #define BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXH_STREXH 1 | |
| 36 | #if !(((defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)) && defined(__thumb__)) || defined(__ARM_ARCH_7M__)) | |
| 37 | // ARMv6k and ARMv7 except ARMv7-M have 64-bit ldrex/strex variants. | |
| 38 | // Unfortunately, GCC (at least 4.7.3 on Ubuntu) does not allocate register pairs properly when targeting ARMv6k Thumb, | |
| 39 | // which is required for ldrexd/strexd instructions, so we disable 64-bit support. When targeting ARMv6k ARM | |
| 40 | // or ARMv7 (both ARM and Thumb 2) it works as expected. | |
| 41 | #define BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXD_STREXD 1 | |
| 42 | #endif | |
| 43 | #endif | |
| 44 | ||
| 45 | #define BOOST_ATOMIC_INT8_LOCK_FREE 2 | |
| 46 | #define BOOST_ATOMIC_INT16_LOCK_FREE 2 | |
| 47 | #define BOOST_ATOMIC_INT32_LOCK_FREE 2 | |
| 48 | #if defined(BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXD_STREXD) | |
| 49 | #define BOOST_ATOMIC_INT64_LOCK_FREE 2 | |
| 50 | #endif | |
| 51 | #define BOOST_ATOMIC_POINTER_LOCK_FREE 2 | |
| 52 | ||
| 53 | #define BOOST_ATOMIC_THREAD_FENCE 2 | |
| 54 | #define BOOST_ATOMIC_SIGNAL_FENCE 2 | |
| 55 | ||
| 56 | #endif // BOOST_ATOMIC_DETAIL_CAPS_GCC_ARM_HPP_INCLUDED_ |