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Modified 8 and 16-bit CAS loops to employ register renaming.

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This commit is contained in:
Andrey Semashev
2017-07-04 23:28:01 +03:00
parent e30c54754b
commit d375cf0dff
2 changed files with 14 additions and 12 deletions
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7
include/boost/atomic/detail/extra_ops_gcc_x86.hpp
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@@ -15,7 +15,6 @@
#define BOOST_ATOMIC_DETAIL_EXTRA_OPS_GCC_X86_HPP_INCLUDED_
#include <cstddef>
#include <boost/cstdint.hpp>
#include <boost/memory_order.hpp>
#include <boost/atomic/detail/config.hpp>
#include <boost/atomic/detail/storage_type.hpp>
@@ -116,9 +115,10 @@ struct extra_operations< Base, 1u, Signed > :
{
typedef gcc_x86_extra_operations_common< Base > base_type;
typedef typename base_type::storage_type storage_type;
typedef typename make_storage_type< 4u, Signed >::type temp_storage_type;
#define BOOST_ATOMIC_DETAIL_CAS_LOOP(op, result)\
boost::uint32_t new_val;\
temp_storage_type new_val;\
__asm__ __volatile__\
(\
".align 16\n\t"\
@@ -431,9 +431,10 @@ struct extra_operations< Base, 2u, Signed > :
{
typedef gcc_x86_extra_operations_common< Base > base_type;
typedef typename base_type::storage_type storage_type;
typedef typename make_storage_type< 4u, Signed >::type temp_storage_type;
#define BOOST_ATOMIC_DETAIL_CAS_LOOP(op, result)\
boost::uint32_t new_val;\
temp_storage_type new_val;\
__asm__ __volatile__\
(\
".align 16\n\t"\

19
include/boost/atomic/detail/ops_gcc_x86.hpp
View File

@@ -17,7 +17,6 @@
#define BOOST_ATOMIC_DETAIL_OPS_GCC_X86_HPP_INCLUDED_
#include <cstddef>
#include <boost/cstdint.hpp>
#include <boost/memory_order.hpp>
#include <boost/atomic/detail/config.hpp>
#include <boost/atomic/detail/storage_type.hpp>
@@ -109,6 +108,7 @@ struct operations< 1u, Signed > :
typedef gcc_x86_operations< typename make_storage_type< 1u, Signed >::type, operations< 1u, Signed > > base_type;
typedef typename base_type::storage_type storage_type;
typedef typename make_storage_type< 1u, Signed >::aligned aligned_storage_type;
typedef typename make_storage_type< 4u, Signed >::type temp_storage_type;
static BOOST_CONSTEXPR_OR_CONST std::size_t storage_size = 1u;
static BOOST_CONSTEXPR_OR_CONST bool is_signed = Signed;
@@ -155,16 +155,16 @@ struct operations< 1u, Signed > :
}
#define BOOST_ATOMIC_DETAIL_CAS_LOOP(op, argument, result)\
boost::uint32_t new_val;\
temp_storage_type new_val;\
__asm__ __volatile__\
(\
".align 16\n\t"\
"1: movzbl %[arg], %2\n\t"\
"1: mov %[arg], %2\n\t"\
op " %%al, %b2\n\t"\
"lock; cmpxchgb %b2, %[storage]\n\t"\
"jne 1b"\
: [res] "+a" (result), [storage] "+m" (storage), "=&q" (new_val)\
: [arg] "q" (argument)\
: [arg] "ir" ((temp_storage_type)argument)\
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "memory"\
)
@@ -199,6 +199,7 @@ struct operations< 2u, Signed > :
typedef gcc_x86_operations< typename make_storage_type< 2u, Signed >::type, operations< 2u, Signed > > base_type;
typedef typename base_type::storage_type storage_type;
typedef typename make_storage_type< 2u, Signed >::aligned aligned_storage_type;
typedef typename make_storage_type< 4u, Signed >::type temp_storage_type;
static BOOST_CONSTEXPR_OR_CONST std::size_t storage_size = 2u;
static BOOST_CONSTEXPR_OR_CONST bool is_signed = Signed;
@@ -245,16 +246,16 @@ struct operations< 2u, Signed > :
}
#define BOOST_ATOMIC_DETAIL_CAS_LOOP(op, argument, result)\
boost::uint32_t new_val;\
temp_storage_type new_val;\
__asm__ __volatile__\
(\
".align 16\n\t"\
"1: movzwl %[arg], %2\n\t"\
"1: mov %[arg], %2\n\t"\
op " %%ax, %w2\n\t"\
"lock; cmpxchgw %w2, %[storage]\n\t"\
"jne 1b"\
: [res] "+a" (result), [storage] "+m" (storage), "=&q" (new_val)\
: [arg] "q" (argument)\
: [arg] "ir" ((temp_storage_type)argument)\
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "memory"\
)
@@ -339,12 +340,12 @@ struct operations< 4u, Signed > :
__asm__ __volatile__\
(\
".align 16\n\t"\
"1: movl %[arg], %[new_val]\n\t"\
"1: mov %[arg], %[new_val]\n\t"\
op " %%eax, %[new_val]\n\t"\
"lock; cmpxchgl %[new_val], %[storage]\n\t"\
"jne 1b"\
: [res] "+a" (result), [storage] "+m" (storage), [new_val] "=&r" (new_val)\
: [arg] "r" (argument)\
: [arg] "ir" (argument)\
: BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "memory"\
)