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Diffstat (limited to 'boost/atomic/detail/extra_ops_gcc_arm.hpp')
| -rw-r--r-- | boost/atomic/detail/extra_ops_gcc_arm.hpp | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/boost/atomic/detail/extra_ops_gcc_arm.hpp b/boost/atomic/detail/extra_ops_gcc_arm.hpp new file mode 100644 index 0000000000..9bd4829bd8 --- /dev/null +++ b/boost/atomic/detail/extra_ops_gcc_arm.hpp @@ -0,0 +1,336 @@ +/* + * 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) 2017 Andrey Semashev + */ +/*! + * \file atomic/detail/extra_ops_gcc_arm.hpp + * + * This header contains implementation of the extra atomic operations for ARM. + */ + +#ifndef BOOST_ATOMIC_DETAIL_EXTRA_OPS_GCC_ARM_HPP_INCLUDED_ +#define BOOST_ATOMIC_DETAIL_EXTRA_OPS_GCC_ARM_HPP_INCLUDED_ + +#include <cstddef> +#include <boost/cstdint.hpp> +#include <boost/memory_order.hpp> +#include <boost/atomic/detail/config.hpp> +#include <boost/atomic/detail/platform.hpp> +#include <boost/atomic/detail/storage_type.hpp> +#include <boost/atomic/detail/extra_operations_fwd.hpp> +#include <boost/atomic/detail/extra_ops_generic.hpp> +#include <boost/atomic/detail/ops_gcc_arm_common.hpp> +#include <boost/atomic/capabilities.hpp> + +#ifdef BOOST_HAS_PRAGMA_ONCE +#pragma once +#endif + +namespace boost { +namespace atomics { +namespace detail { + +#if defined(BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXB_STREXB) + +template< typename Base, bool Signed > +struct extra_operations< Base, 1u, Signed > : + public generic_extra_operations< Base, 1u, Signed > +{ + typedef generic_extra_operations< Base, 1u, Signed > base_type; + typedef typename base_type::storage_type storage_type; + typedef typename make_storage_type< 4u, Signed >::type extended_storage_type; + + static BOOST_FORCEINLINE storage_type fetch_negate(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + gcc_arm_operations_base::fence_before(order); + uint32_t tmp; + extended_storage_type original, result; + __asm__ __volatile__ + ( + BOOST_ATOMIC_DETAIL_ARM_ASM_START(%[tmp]) + "1:\n" + "ldrexb %[original], %[storage]\n" // original = *(&storage) + "rsb %[result], %[original], #0\n" // result = 0 - original + "strexb %[tmp], %[result], %[storage]\n" // *(&storage) = result, tmp = store failed + "teq %[tmp], #0\n" // flags = tmp==0 + "bne 1b\n" // if (!flags.equal) goto retry + BOOST_ATOMIC_DETAIL_ARM_ASM_END(%[tmp]) + : [original] "=&r" (original), // %0 + [result] "=&r" (result), // %1 + [tmp] "=&l" (tmp), // %2 + [storage] "+Q" (storage) // %3 + : + : BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC + ); + gcc_arm_operations_base::fence_after(order); + return static_cast< storage_type >(original); + } + + static BOOST_FORCEINLINE storage_type fetch_complement(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + gcc_arm_operations_base::fence_before(order); + uint32_t tmp; + extended_storage_type original, result; + __asm__ __volatile__ + ( + BOOST_ATOMIC_DETAIL_ARM_ASM_START(%[tmp]) + "1:\n" + "ldrexb %[original], %[storage]\n" // original = *(&storage) + "mvn %[result], %[original]\n" // result = NOT original + "strexb %[tmp], %[result], %[storage]\n" // *(&storage) = result, tmp = store failed + "teq %[tmp], #0\n" // flags = tmp==0 + "bne 1b\n" // if (!flags.equal) goto retry + BOOST_ATOMIC_DETAIL_ARM_ASM_END(%[tmp]) + : [original] "=&r" (original), // %0 + [result] "=&r" (result), // %1 + [tmp] "=&l" (tmp), // %2 + [storage] "+Q" (storage) // %3 + : + : BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC + ); + gcc_arm_operations_base::fence_after(order); + return static_cast< storage_type >(original); + } + + static BOOST_FORCEINLINE void opaque_negate(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + fetch_negate(storage, order); + } + + static BOOST_FORCEINLINE void opaque_complement(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + fetch_complement(storage, order); + } +}; + +#endif // defined(BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXB_STREXB) + +#if defined(BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXH_STREXH) + +template< typename Base, bool Signed > +struct extra_operations< Base, 2u, Signed > : + public generic_extra_operations< Base, 2u, Signed > +{ + typedef generic_extra_operations< Base, 2u, Signed > base_type; + typedef typename base_type::storage_type storage_type; + typedef typename make_storage_type< 4u, Signed >::type extended_storage_type; + + static BOOST_FORCEINLINE storage_type fetch_negate(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + gcc_arm_operations_base::fence_before(order); + uint32_t tmp; + extended_storage_type original, result; + __asm__ __volatile__ + ( + BOOST_ATOMIC_DETAIL_ARM_ASM_START(%[tmp]) + "1:\n" + "ldrexh %[original], %[storage]\n" // original = *(&storage) + "rsb %[result], %[original], #0\n" // result = 0 - original + "strexh %[tmp], %[result], %[storage]\n" // *(&storage) = result, tmp = store failed + "teq %[tmp], #0\n" // flags = tmp==0 + "bne 1b\n" // if (!flags.equal) goto retry + BOOST_ATOMIC_DETAIL_ARM_ASM_END(%[tmp]) + : [original] "=&r" (original), // %0 + [result] "=&r" (result), // %1 + [tmp] "=&l" (tmp), // %2 + [storage] "+Q" (storage) // %3 + : + : BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC + ); + gcc_arm_operations_base::fence_after(order); + return static_cast< storage_type >(original); + } + + static BOOST_FORCEINLINE storage_type fetch_complement(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + gcc_arm_operations_base::fence_before(order); + uint32_t tmp; + extended_storage_type original, result; + __asm__ __volatile__ + ( + BOOST_ATOMIC_DETAIL_ARM_ASM_START(%[tmp]) + "1:\n" + "ldrexh %[original], %[storage]\n" // original = *(&storage) + "mvn %[result], %[original]\n" // result = NOT original + "strexh %[tmp], %[result], %[storage]\n" // *(&storage) = result, tmp = store failed + "teq %[tmp], #0\n" // flags = tmp==0 + "bne 1b\n" // if (!flags.equal) goto retry + BOOST_ATOMIC_DETAIL_ARM_ASM_END(%[tmp]) + : [original] "=&r" (original), // %0 + [result] "=&r" (result), // %1 + [tmp] "=&l" (tmp), // %2 + [storage] "+Q" (storage) // %3 + : + : BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC + ); + gcc_arm_operations_base::fence_after(order); + return static_cast< storage_type >(original); + } + + static BOOST_FORCEINLINE void opaque_negate(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + fetch_negate(storage, order); + } + + static BOOST_FORCEINLINE void opaque_complement(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + fetch_complement(storage, order); + } +}; + +#endif // defined(BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXH_STREXH) + +template< typename Base, bool Signed > +struct extra_operations< Base, 4u, Signed > : + public generic_extra_operations< Base, 4u, Signed > +{ + typedef generic_extra_operations< Base, 4u, Signed > base_type; + typedef typename base_type::storage_type storage_type; + + static BOOST_FORCEINLINE storage_type fetch_negate(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + gcc_arm_operations_base::fence_before(order); + uint32_t tmp; + storage_type original, result; + __asm__ __volatile__ + ( + BOOST_ATOMIC_DETAIL_ARM_ASM_START(%[tmp]) + "1:\n" + "ldrex %[original], %[storage]\n" // original = *(&storage) + "rsb %[result], %[original], #0\n" // result = 0 - original + "strex %[tmp], %[result], %[storage]\n" // *(&storage) = result, tmp = store failed + "teq %[tmp], #0\n" // flags = tmp==0 + "bne 1b\n" // if (!flags.equal) goto retry + BOOST_ATOMIC_DETAIL_ARM_ASM_END(%[tmp]) + : [original] "=&r" (original), // %0 + [result] "=&r" (result), // %1 + [tmp] "=&l" (tmp), // %2 + [storage] "+Q" (storage) // %3 + : + : BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC + ); + gcc_arm_operations_base::fence_after(order); + return original; + } + + static BOOST_FORCEINLINE storage_type fetch_complement(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + gcc_arm_operations_base::fence_before(order); + uint32_t tmp; + storage_type original, result; + __asm__ __volatile__ + ( + BOOST_ATOMIC_DETAIL_ARM_ASM_START(%[tmp]) + "1:\n" + "ldrex %[original], %[storage]\n" // original = *(&storage) + "mvn %[result], %[original]\n" // result = NOT original + "strex %[tmp], %[result], %[storage]\n" // *(&storage) = result, tmp = store failed + "teq %[tmp], #0\n" // flags = tmp==0 + "bne 1b\n" // if (!flags.equal) goto retry + BOOST_ATOMIC_DETAIL_ARM_ASM_END(%[tmp]) + : [original] "=&r" (original), // %0 + [result] "=&r" (result), // %1 + [tmp] "=&l" (tmp), // %2 + [storage] "+Q" (storage) // %3 + : + : BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC + ); + gcc_arm_operations_base::fence_after(order); + return original; + } + + static BOOST_FORCEINLINE void opaque_negate(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + fetch_negate(storage, order); + } + + static BOOST_FORCEINLINE void opaque_complement(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + fetch_complement(storage, order); + } +}; + +#if defined(BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXD_STREXD) + +template< typename Base, bool Signed > +struct extra_operations< Base, 8u, Signed > : + public generic_extra_operations< Base, 8u, Signed > +{ + typedef generic_extra_operations< Base, 8u, Signed > base_type; + typedef typename base_type::storage_type storage_type; + + static BOOST_FORCEINLINE storage_type fetch_negate(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + gcc_arm_operations_base::fence_before(order); + storage_type original, result; + uint32_t tmp; + __asm__ __volatile__ + ( + BOOST_ATOMIC_DETAIL_ARM_ASM_START(%0) + "1:\n" + "ldrexd %1, %H1, [%3]\n" // original = *(&storage) + "mvn %2, %1\n" // result = NOT original + "mvn %H2, %H1\n" + "adds %2, %2, #1\n" // result = result + 1 + "adc %H2, %H2, #0\n" + "strexd %0, %2, %H2, [%3]\n" // *(&storage) = result, tmp = store failed + "teq %0, #0\n" // flags = tmp==0 + "bne 1b\n" // if (!flags.equal) goto retry + BOOST_ATOMIC_DETAIL_ARM_ASM_END(%0) + : BOOST_ATOMIC_DETAIL_ARM_ASM_TMPREG_CONSTRAINT(tmp), // %0 + "=&r" (original), // %1 + "=&r" (result) // %2 + : "r" (&storage) // %3 + : BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "memory" + ); + gcc_arm_operations_base::fence_after(order); + return original; + } + + static BOOST_FORCEINLINE storage_type fetch_complement(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + gcc_arm_operations_base::fence_before(order); + storage_type original, result; + uint32_t tmp; + __asm__ __volatile__ + ( + BOOST_ATOMIC_DETAIL_ARM_ASM_START(%0) + "1:\n" + "ldrexd %1, %H1, [%3]\n" // original = *(&storage) + "mvn %2, %1\n" // result = NOT original + "mvn %H2, %H1\n" + "strexd %0, %2, %H2, [%3]\n" // *(&storage) = result, tmp = store failed + "teq %0, #0\n" // flags = tmp==0 + "bne 1b\n" // if (!flags.equal) goto retry + BOOST_ATOMIC_DETAIL_ARM_ASM_END(%0) + : BOOST_ATOMIC_DETAIL_ARM_ASM_TMPREG_CONSTRAINT(tmp), // %0 + "=&r" (original), // %1 + "=&r" (result) // %2 + : "r" (&storage) // %3 + : BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "memory" + ); + gcc_arm_operations_base::fence_after(order); + return original; + } + + static BOOST_FORCEINLINE void opaque_negate(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + fetch_negate(storage, order); + } + + static BOOST_FORCEINLINE void opaque_complement(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT + { + fetch_complement(storage, order); + } +}; + +#endif // defined(BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXD_STREXD) + +} // namespace detail +} // namespace atomics +} // namespace boost + +#endif // BOOST_ATOMIC_DETAIL_EXTRA_OPS_GCC_ARM_HPP_INCLUDED_ |