You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
3.1 KiB
98 lines
3.1 KiB
4 years ago
|
// AsmJit - Machine code generation for C++
|
||
|
|
//
|
||
|
|
// * Official AsmJit Home Page: https://asmjit.com
|
||
|
|
// * Official Github Repository: https://github.com/asmjit/asmjit
|
||
|
|
//
|
||
|
|
// Copyright (c) 2008-2020 The AsmJit Authors
|
||
|
|
//
|
||
|
|
// This software is provided 'as-is', without any express or implied
|
||
|
|
// warranty. In no event will the authors be held liable for any damages
|
||
|
|
// arising from the use of this software.
|
||
|
|
//
|
||
|
|
// Permission is granted to anyone to use this software for any purpose,
|
||
|
|
// including commercial applications, and to alter it and redistribute it
|
||
|
|
// freely, subject to the following restrictions:
|
||
|
|
//
|
||
|
|
// 1. The origin of this software must not be misrepresented; you must not
|
||
|
|
// claim that you wrote the original software. If you use this software
|
||
|
|
// in a product, an acknowledgment in the product documentation would be
|
||
|
|
// appreciated but is not required.
|
||
|
|
// 2. Altered source versions must be plainly marked as such, and must not be
|
||
|
|
// misrepresented as being the original software.
|
||
|
|
// 3. This notice may not be removed or altered from any source distribution.
|
||
|
|
|
||
|
|
#include "../core/api-build_p.h"
|
||
|
|
#include "../core/cpuinfo.h"
|
||
|
|
|
||
|
|
#if !defined(_WIN32)
|
||
|
|
#include <errno.h>
|
||
|
|
#include <sys/utsname.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
ASMJIT_BEGIN_NAMESPACE
|
||
|
|
|
||
|
|
// ============================================================================
|
||
|
|
// [asmjit::CpuInfo - Detect - CPU NumThreads]
|
||
|
|
// ============================================================================
|
||
|
|
|
||
|
|
#if defined(_WIN32)
|
||
|
|
static inline uint32_t detectHWThreadCount() noexcept {
|
||
|
|
SYSTEM_INFO info;
|
||
|
|
::GetSystemInfo(&info);
|
||
|
|
return info.dwNumberOfProcessors;
|
||
|
|
}
|
||
|
|
#elif defined(_SC_NPROCESSORS_ONLN)
|
||
|
|
static inline uint32_t detectHWThreadCount() noexcept {
|
||
|
|
long res = ::sysconf(_SC_NPROCESSORS_ONLN);
|
||
|
|
return res <= 0 ? uint32_t(1) : uint32_t(res);
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
static inline uint32_t detectHWThreadCount() noexcept {
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// ============================================================================
|
||
|
|
// [asmjit::CpuInfo - Detect - CPU Features]
|
||
|
|
// ============================================================================
|
||
|
|
|
||
|
|
#if defined(ASMJIT_BUILD_X86) && ASMJIT_ARCH_X86
|
||
|
|
namespace x86 { void detectCpu(CpuInfo& cpu) noexcept; }
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(ASMJIT_BUILD_ARM) && ASMJIT_ARCH_ARM
|
||
|
|
namespace arm { void detectCpu(CpuInfo& cpu) noexcept; }
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// ============================================================================
|
||
|
|
// [asmjit::CpuInfo - Detect - Static Initializer]
|
||
|
|
// ============================================================================
|
||
|
|
|
||
|
|
static uint32_t cpuInfoInitialized;
|
||
|
|
static CpuInfo cpuInfoGlobal(Globals::NoInit);
|
||
|
|
|
||
|
|
const CpuInfo& CpuInfo::host() noexcept {
|
||
|
|
// This should never cause a problem as the resulting information should
|
||
|
|
// always be the same.
|
||
|
|
if (!cpuInfoInitialized) {
|
||
|
|
CpuInfo cpuInfoLocal;
|
||
|
|
|
||
|
|
#if defined(ASMJIT_BUILD_X86) && ASMJIT_ARCH_X86
|
||
|
|
x86::detectCpu(cpuInfoLocal);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(ASMJIT_BUILD_ARM) && ASMJIT_ARCH_ARM
|
||
|
|
arm::detectCpu(cpuInfoLocal);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
cpuInfoLocal._hwThreadCount = detectHWThreadCount();
|
||
|
|
cpuInfoGlobal = cpuInfoLocal;
|
||
|
|
cpuInfoInitialized = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return cpuInfoGlobal;
|
||
|
|
}
|
||
|
|
|
||
|
|
ASMJIT_END_NAMESPACE
|