101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
// Copyright (C) 2015 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Core module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Core/Win32/HardwareInfoImpl.hpp>
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#include <Nazara/Core/Error.hpp>
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#include <windows.h>
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#ifdef NAZARA_COMPILER_MSVC
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#include <intrin.h>
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#endif
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#include <Nazara/Core/Debug.hpp>
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namespace Nz
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{
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void HardwareInfoImpl::Cpuid(UInt32 functionId, UInt32 subFunctionId, UInt32 registers[4])
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{
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#if defined(NAZARA_COMPILER_MSVC)
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static_assert(sizeof(UInt32) == sizeof(int), "Assertion failed");
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// Visual propose une fonction intrinsèque pour le cpuid
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__cpuidex(reinterpret_cast<int*>(registers), static_cast<int>(functionId), static_cast<int>(subFunctionId));
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#elif defined(NAZARA_COMPILER_CLANG) || defined(NAZARA_COMPILER_GCC) || defined(NAZARA_COMPILER_INTEL)
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// Source: http://stackoverflow.com/questions/1666093/cpuid-implementations-in-c
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asm volatile ("cpuid" // Besoin d'être volatile ?
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: "=a" (registers[0]), "=b" (registers[1]), "=c" (registers[2]), "=d" (registers[3]) // output
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: "a" (functionId), "c" (subFunctionId)); // input
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#else
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NazaraInternalError("Cpuid has been called although it is not supported");
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#endif
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}
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unsigned int HardwareInfoImpl::GetProcessorCount()
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{
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// Plus simple (et plus portable) que de passer par le CPUID
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SYSTEM_INFO infos;
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GetNativeSystemInfo(&infos);
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return infos.dwNumberOfProcessors;
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}
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UInt64 HardwareInfoImpl::GetTotalMemory()
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{
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MEMORYSTATUSEX memStatus;
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memStatus.dwLength = sizeof(memStatus);
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GlobalMemoryStatusEx(&memStatus);
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return memStatus.ullTotalPhys;
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}
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bool HardwareInfoImpl::IsCpuidSupported()
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{
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#ifdef NAZARA_PLATFORM_x64
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return true; // Toujours supporté sur un processeur 64 bits
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#else
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#if defined(NAZARA_COMPILER_MSVC)
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int supported;
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__asm
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{
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pushfd
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pop eax
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mov ecx, eax
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xor eax, 0x200000
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push eax
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popfd
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pushfd
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pop eax
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xor eax, ecx
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mov supported, eax
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push ecx
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popfd
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};
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return supported != 0;
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#elif defined(NAZARA_COMPILER_CLANG) || defined(NAZARA_COMPILER_GCC) || defined(NAZARA_COMPILER_INTEL)
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int supported;
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asm volatile (" pushfl\n"
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" pop %%eax\n"
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" mov %%eax, %%ecx\n"
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" xor $0x200000, %%eax\n"
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" push %%eax\n"
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" popfl\n"
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" pushfl\n"
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" pop %%eax\n"
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" xor %%ecx, %%eax\n"
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" mov %%eax, %0\n"
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" push %%ecx\n"
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" popfl"
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: "=m" (supported) // output
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: // input
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: "eax", "ecx", "memory"); // clobbered register
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return supported != 0;
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#else
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return false;
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#endif
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#endif
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}
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}
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