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Current File : //proc/self/root/usr/include/boost/atomic/detail/extra_ops_gcc_arm.hpp /*
* 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 - 2018 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 {
template< typename Base >
struct gcc_arm_extra_operations_common :
public Base
{
typedef Base base_type;
typedef typename base_type::storage_type storage_type;
static BOOST_FORCEINLINE void opaque_negate(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
{
base_type::fetch_negate(storage, order);
}
static BOOST_FORCEINLINE void opaque_complement(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
{
base_type::fetch_complement(storage, order);
}
static BOOST_FORCEINLINE bool negate_and_test(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
{
return !!base_type::negate(storage, order);
}
static BOOST_FORCEINLINE bool add_and_test(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
{
return !!base_type::add(storage, v, order);
}
static BOOST_FORCEINLINE bool sub_and_test(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
{
return !!base_type::sub(storage, v, order);
}
static BOOST_FORCEINLINE bool and_and_test(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
{
return !!base_type::bitwise_and(storage, v, order);
}
static BOOST_FORCEINLINE bool or_and_test(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
{
return !!base_type::bitwise_or(storage, v, order);
}
static BOOST_FORCEINLINE bool xor_and_test(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
{
return !!base_type::bitwise_xor(storage, v, order);
}
static BOOST_FORCEINLINE bool complement_and_test(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
{
return !!base_type::bitwise_complement(storage, order);
}
};
template< typename Base, std::size_t Size, bool Signed >
struct gcc_arm_extra_operations;
#if defined(BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXB_STREXB)
template< typename Base, bool Signed >
struct gcc_arm_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 >::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 = zero_extend(*(&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 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 = zero_extend(*(&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 >(result);
}
static BOOST_FORCEINLINE storage_type add(storage_type volatile& storage, storage_type v, 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 = zero_extend(*(&storage))
"add %[result], %[original], %[value]\n" // result = original + value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return static_cast< storage_type >(result);
}
static BOOST_FORCEINLINE storage_type sub(storage_type volatile& storage, storage_type v, 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 = zero_extend(*(&storage))
"sub %[result], %[original], %[value]\n" // result = original - value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return static_cast< storage_type >(result);
}
static BOOST_FORCEINLINE storage_type bitwise_and(storage_type volatile& storage, storage_type v, 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 = zero_extend(*(&storage))
"and %[result], %[original], %[value]\n" // result = original & value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return static_cast< storage_type >(result);
}
static BOOST_FORCEINLINE storage_type bitwise_or(storage_type volatile& storage, storage_type v, 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 = zero_extend(*(&storage))
"orr %[result], %[original], %[value]\n" // result = original | value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return static_cast< storage_type >(result);
}
static BOOST_FORCEINLINE storage_type bitwise_xor(storage_type volatile& storage, storage_type v, 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 = zero_extend(*(&storage))
"eor %[result], %[original], %[value]\n" // result = original ^ value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return static_cast< storage_type >(result);
}
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 = zero_extend(*(&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 storage_type bitwise_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 = zero_extend(*(&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 >(result);
}
};
template< typename Base, bool Signed >
struct extra_operations< Base, 1u, Signed, true > :
public gcc_arm_extra_operations_common< gcc_arm_extra_operations< Base, 1u, Signed > >
{
};
#endif // defined(BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXB_STREXB)
#if defined(BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXH_STREXH)
template< typename Base, bool Signed >
struct gcc_arm_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 >::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 = zero_extend(*(&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 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 = zero_extend(*(&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 >(result);
}
static BOOST_FORCEINLINE storage_type add(storage_type volatile& storage, storage_type v, 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 = zero_extend(*(&storage))
"add %[result], %[original], %[value]\n" // result = original + value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return static_cast< storage_type >(result);
}
static BOOST_FORCEINLINE storage_type sub(storage_type volatile& storage, storage_type v, 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 = zero_extend(*(&storage))
"sub %[result], %[original], %[value]\n" // result = original - value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return static_cast< storage_type >(result);
}
static BOOST_FORCEINLINE storage_type bitwise_and(storage_type volatile& storage, storage_type v, 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 = zero_extend(*(&storage))
"and %[result], %[original], %[value]\n" // result = original & value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return static_cast< storage_type >(result);
}
static BOOST_FORCEINLINE storage_type bitwise_or(storage_type volatile& storage, storage_type v, 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 = zero_extend(*(&storage))
"orr %[result], %[original], %[value]\n" // result = original | value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return static_cast< storage_type >(result);
}
static BOOST_FORCEINLINE storage_type bitwise_xor(storage_type volatile& storage, storage_type v, 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 = zero_extend(*(&storage))
"eor %[result], %[original], %[value]\n" // result = original ^ value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return static_cast< storage_type >(result);
}
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 = zero_extend(*(&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 storage_type bitwise_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 = zero_extend(*(&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 >(result);
}
};
template< typename Base, bool Signed >
struct extra_operations< Base, 2u, Signed, true > :
public gcc_arm_extra_operations_common< gcc_arm_extra_operations< Base, 2u, Signed > >
{
};
#endif // defined(BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXH_STREXH)
template< typename Base, bool Signed >
struct gcc_arm_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 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 result;
}
static BOOST_FORCEINLINE storage_type add(storage_type volatile& storage, storage_type v, 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)
"add %[result], %[original], %[value]\n" // result = original + value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return result;
}
static BOOST_FORCEINLINE storage_type sub(storage_type volatile& storage, storage_type v, 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)
"sub %[result], %[original], %[value]\n" // result = original - value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return result;
}
static BOOST_FORCEINLINE storage_type bitwise_and(storage_type volatile& storage, storage_type v, 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)
"and %[result], %[original], %[value]\n" // result = original & value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return result;
}
static BOOST_FORCEINLINE storage_type bitwise_or(storage_type volatile& storage, storage_type v, 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)
"orr %[result], %[original], %[value]\n" // result = original | value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return result;
}
static BOOST_FORCEINLINE storage_type bitwise_xor(storage_type volatile& storage, storage_type v, 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)
"eor %[result], %[original], %[value]\n" // result = original ^ value
"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
: [value] "Ir" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
);
gcc_arm_operations_base::fence_after(order);
return result;
}
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 storage_type bitwise_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 result;
}
};
template< typename Base, bool Signed >
struct extra_operations< Base, 4u, Signed, true > :
public gcc_arm_extra_operations_common< gcc_arm_extra_operations< Base, 4u, Signed > >
{
};
#if defined(BOOST_ATOMIC_DETAIL_ARM_HAS_LDREXD_STREXD)
template< typename Base, bool Signed >
struct gcc_arm_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 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 result;
}
static BOOST_FORCEINLINE storage_type add(storage_type volatile& storage, storage_type v, 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)
"adds %2, %1, %4\n" // result = original + value
"adc %H2, %H1, %H4\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
"r" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "memory"
);
gcc_arm_operations_base::fence_after(order);
return result;
}
static BOOST_FORCEINLINE storage_type sub(storage_type volatile& storage, storage_type v, 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)
"subs %2, %1, %4\n" // result = original - value
"sbc %H2, %H1, %H4\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
"r" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "memory"
);
gcc_arm_operations_base::fence_after(order);
return result;
}
static BOOST_FORCEINLINE storage_type bitwise_and(storage_type volatile& storage, storage_type v, 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)
"and %2, %1, %4\n" // result = original & value
"and %H2, %H1, %H4\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
"r" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "memory"
);
gcc_arm_operations_base::fence_after(order);
return result;
}
static BOOST_FORCEINLINE storage_type bitwise_or(storage_type volatile& storage, storage_type v, 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)
"orr %2, %1, %4\n" // result = original | value
"orr %H2, %H1, %H4\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
"r" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "memory"
);
gcc_arm_operations_base::fence_after(order);
return result;
}
static BOOST_FORCEINLINE storage_type bitwise_xor(storage_type volatile& storage, storage_type v, 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)
"eor %2, %1, %4\n" // result = original ^ value
"eor %H2, %H1, %H4\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
"r" (v) // %4
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "memory"
);
gcc_arm_operations_base::fence_after(order);
return result;
}
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 storage_type bitwise_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 result;
}
};
template< typename Base, bool Signed >
struct extra_operations< Base, 8u, Signed, true > :
public gcc_arm_extra_operations_common< gcc_arm_extra_operations< Base, 8u, Signed > >
{
};
#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_
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