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/*
* Copyright Andrey Semashev 2007 - 2015.
* 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)
*/
/*!
* \file dump.cpp
* \author Andrey Semashev
* \date 03.05.2013
*
* \brief This header is the Boost.Log library implementation, see the library documentation
* at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
*/
#include <ostream>
#include <boost/cstdint.hpp>
#include <boost/log/utility/manipulators/dump.hpp>
#if defined(_MSC_VER)
#include "windows_version.hpp"
#include <windows.h>
#include <intrin.h> // __cpuid
#endif
#include <boost/log/detail/header.hpp>
namespace boost {
BOOST_LOG_OPEN_NAMESPACE
namespace aux {
#if defined(BOOST_LOG_USE_SSSE3)
extern dump_data_char_t dump_data_char_ssse3;
extern dump_data_wchar_t dump_data_wchar_ssse3;
#if !defined(BOOST_NO_CXX11_CHAR16_T)
extern dump_data_char16_t dump_data_char16_ssse3;
#endif
#if !defined(BOOST_NO_CXX11_CHAR32_T)
extern dump_data_char32_t dump_data_char32_ssse3;
#endif
#endif
#if defined(BOOST_LOG_USE_AVX2)
extern dump_data_char_t dump_data_char_avx2;
extern dump_data_wchar_t dump_data_wchar_avx2;
#if !defined(BOOST_NO_CXX11_CHAR16_T)
extern dump_data_char16_t dump_data_char16_avx2;
#endif
#if !defined(BOOST_NO_CXX11_CHAR32_T)
extern dump_data_char32_t dump_data_char32_avx2;
#endif
#endif
enum { stride = 256 };
extern const char g_hex_char_table[2][16] =
{
{ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' },
{ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }
};
template< typename CharT >
void dump_data_generic(const void* data, std::size_t size, std::basic_ostream< CharT >& strm)
{
typedef CharT char_type;
char_type buf[stride * 3u];
const char* const char_table = g_hex_char_table[(strm.flags() & std::ios_base::uppercase) != 0];
const std::size_t stride_count = size / stride, tail_size = size % stride;
const uint8_t* p = static_cast< const uint8_t* >(data);
char_type* buf_begin = buf + 1u; // skip the first space of the first chunk
char_type* buf_end = buf + sizeof(buf) / sizeof(*buf);
for (std::size_t i = 0; i < stride_count; ++i)
{
char_type* b = buf;
for (unsigned int j = 0; j < stride; ++j, b += 3u, ++p)
{
uint32_t n = *p;
b[0] = static_cast< char_type >(' ');
b[1] = static_cast< char_type >(char_table[n >> 4]);
b[2] = static_cast< char_type >(char_table[n & 0x0F]);
}
strm.write(buf_begin, buf_end - buf_begin);
buf_begin = buf;
}
if (tail_size > 0)
{
char_type* b = buf;
unsigned int i = 0;
do
{
uint32_t n = *p;
b[0] = static_cast< char_type >(' ');
b[1] = static_cast< char_type >(char_table[n >> 4]);
b[2] = static_cast< char_type >(char_table[n & 0x0F]);
++i;
++p;
b += 3u;
}
while (i < tail_size);
strm.write(buf_begin, b - buf_begin);
}
}
BOOST_LOG_API dump_data_char_t* dump_data_char = &dump_data_generic< char >;
BOOST_LOG_API dump_data_wchar_t* dump_data_wchar = &dump_data_generic< wchar_t >;
#if !defined(BOOST_NO_CXX11_CHAR16_T)
BOOST_LOG_API dump_data_char16_t* dump_data_char16 = &dump_data_generic< char16_t >;
#endif
#if !defined(BOOST_NO_CXX11_CHAR32_T)
BOOST_LOG_API dump_data_char32_t* dump_data_char32 = &dump_data_generic< char32_t >;
#endif
#if defined(BOOST_LOG_USE_SSSE3) || defined(BOOST_LOG_USE_AVX2)
BOOST_LOG_ANONYMOUS_NAMESPACE {
struct function_pointer_initializer
{
function_pointer_initializer()
{
// First, let's check for the max supported cpuid function
uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
cpuid(eax, ebx, ecx, edx);
const uint32_t max_cpuid_function = eax;
if (max_cpuid_function >= 1)
{
eax = 1;
ebx = ecx = edx = 0;
cpuid(eax, ebx, ecx, edx);
// Check for SSSE3 support
if (ecx & (1u << 9))
enable_ssse3();
#if defined(BOOST_LOG_USE_AVX2)
if (max_cpuid_function >= 7)
{
// To check for AVX2 availability we also need to verify that OS supports it
// Check that OSXSAVE is supported by CPU
if (ecx & (1u << 27))
{
// Check that it is used by the OS
bool mmstate = false;
#if defined(__GNUC__)
// Get the XFEATURE_ENABLED_MASK register
__asm__ __volatile__
(
"xgetbv\n\t"
: "=a" (eax), "=d" (edx)
: "c" (0)
);
mmstate = (eax & 6U) == 6U;
#elif defined(_MSC_VER)
// MSVC does not have an intrinsic for xgetbv, we have to query OS
HMODULE hKernel32 = GetModuleHandleA("kernel32.dll");
if (hKernel32)
{
typedef uint64_t (__stdcall* get_enabled_extended_features_t)(uint64_t);
get_enabled_extended_features_t get_enabled_extended_features = (get_enabled_extended_features_t)GetProcAddress(hKernel32, "GetEnabledExtendedFeatures");
if (get_enabled_extended_features)
{
// XSTATE_MASK_LEGACY_SSE | XSTATE_MASK_GSSE == 6
mmstate = get_enabled_extended_features(6u) == 6u;
}
}
#else
#error Boost.Log: Unexpected compiler
#endif
if (mmstate)
{
// Finally, check for AVX2 support in CPU
eax = 7;
ebx = ecx = edx = 0;
cpuid(eax, ebx, ecx, edx);
if (ebx & (1U << 5))
enable_avx2();
}
}
}
#endif // defined(BOOST_LOG_USE_AVX2)
}
}
private:
static void cpuid(uint32_t& eax, uint32_t& ebx, uint32_t& ecx, uint32_t& edx)
{
#if defined(__GNUC__)
#if defined(__i386__) && defined(__PIC__) && __PIC__ != 0
// We have to backup ebx in 32 bit PIC code because it is reserved by the ABI
uint32_t ebx_backup;
__asm__ __volatile__
(
"movl %%ebx, %0\n\t"
"movl %1, %%ebx\n\t"
"cpuid\n\t"
"movl %%ebx, %1\n\t"
"movl %0, %%ebx\n\t"
: "=m" (ebx_backup), "+m" (ebx), "+a" (eax), "+c" (ecx), "+d" (edx)
);
#else
__asm__ __volatile__
(
"cpuid\n\t"
: "+a" (eax), "+b" (ebx), "+c" (ecx), "+d" (edx)
);
#endif
#elif defined(_MSC_VER)
int regs[4] = {};
__cpuid(regs, eax);
eax = regs[0];
ebx = regs[1];
ecx = regs[2];
edx = regs[3];
#else
#error Boost.Log: Unexpected compiler
#endif
}
static void enable_ssse3()
{
dump_data_char = &dump_data_char_ssse3;
dump_data_wchar = &dump_data_wchar_ssse3;
#if !defined(BOOST_NO_CXX11_CHAR16_T)
dump_data_char16 = &dump_data_char16_ssse3;
#endif
#if !defined(BOOST_NO_CXX11_CHAR32_T)
dump_data_char32 = &dump_data_char32_ssse3;
#endif
}
#if defined(BOOST_LOG_USE_AVX2)
static void enable_avx2()
{
dump_data_char = &dump_data_char_avx2;
dump_data_wchar = &dump_data_wchar_avx2;
#if !defined(BOOST_NO_CXX11_CHAR16_T)
dump_data_char16 = &dump_data_char16_avx2;
#endif
#if !defined(BOOST_NO_CXX11_CHAR32_T)
dump_data_char32 = &dump_data_char32_avx2;
#endif
}
#endif // defined(BOOST_LOG_USE_AVX2)
};
static function_pointer_initializer g_function_pointer_initializer;
} // namespace
#endif // defined(BOOST_LOG_USE_SSSE3) || defined(BOOST_LOG_USE_AVX2)
} // namespace aux
BOOST_LOG_CLOSE_NAMESPACE // namespace log
} // namespace boost
#include <boost/log/detail/footer.hpp>
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