mirror of
https://github.com/yuzu-emu/ext-boost.git
synced 2025-01-05 18:15:27 +00:00
79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
// Copyright Oliver Kowalke 2017.
|
|
// 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)
|
|
|
|
#ifndef BOOST_CONTEXT_DETAIL_PREFETCH_H
|
|
#define BOOST_CONTEXT_DETAIL_PREFETCH_H
|
|
|
|
#include <cstddef>
|
|
#include <cstdint>
|
|
|
|
#include <boost/config.hpp>
|
|
#include <boost/predef.h>
|
|
|
|
#include <boost/context/detail/config.hpp>
|
|
|
|
#if BOOST_COMP_INTEL || BOOST_COMP_INTEL_EMULATED
|
|
#include <immintrin.h>
|
|
#endif
|
|
|
|
#if BOOST_COMP_MSVC && !defined(_M_ARM) && !defined(_M_ARM64)
|
|
#include <mmintrin.h>
|
|
#endif
|
|
|
|
#ifdef BOOST_HAS_ABI_HEADERS
|
|
# include BOOST_ABI_PREFIX
|
|
#endif
|
|
|
|
namespace boost {
|
|
namespace context {
|
|
namespace detail {
|
|
|
|
#if BOOST_COMP_GNUC || BOOST_COMP_CLANG
|
|
#define BOOST_HAS_PREFETCH 1
|
|
BOOST_FORCEINLINE
|
|
void prefetch( void * addr) {
|
|
// L1 cache : hint == 1
|
|
__builtin_prefetch( addr, 1, 1);
|
|
}
|
|
#elif BOOST_COMP_INTEL || BOOST_COMP_INTEL_EMULATED
|
|
#define BOOST_HAS_PREFETCH 1
|
|
BOOST_FORCEINLINE
|
|
void prefetch( void * addr) {
|
|
// L1 cache : hint == _MM_HINT_T0
|
|
_mm_prefetch( (const char *)addr, _MM_HINT_T0);
|
|
}
|
|
#elif BOOST_COMP_MSVC && !defined(_M_ARM) && !defined(_M_ARM64)
|
|
#define BOOST_HAS_PREFETCH 1
|
|
BOOST_FORCEINLINE
|
|
void prefetch( void * addr) {
|
|
// L1 cache : hint == _MM_HINT_T0
|
|
_mm_prefetch( (const char *)addr, _MM_HINT_T0);
|
|
}
|
|
#endif
|
|
|
|
inline
|
|
void prefetch_range( void * addr, std::size_t len) {
|
|
#if defined(BOOST_HAS_PREFETCH)
|
|
void * vp = addr;
|
|
void * end = reinterpret_cast< void * >(
|
|
reinterpret_cast< uintptr_t >( addr) + static_cast< uintptr_t >( len) );
|
|
while ( vp < end) {
|
|
prefetch( vp);
|
|
vp = reinterpret_cast< void * >(
|
|
reinterpret_cast< uintptr_t >( vp) + static_cast< uintptr_t >( prefetch_stride) );
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#undef BOOST_HAS_PREFETCH
|
|
|
|
}}}
|
|
|
|
#ifdef BOOST_HAS_ABI_HEADERS
|
|
# include BOOST_ABI_SUFFIX
|
|
#endif
|
|
|
|
#endif // BOOST_CONTEXT_DETAIL_PREFETCH_H
|