Added HardwareInfo class

Former-commit-id: 3db2f8f11d58b4b71b85f749ce2a12dcfff986bc

src/Nazara/Core/Win32/HardwareInfoImpl.cpp

@@ -0,0 +1,82 @@
+// Copyright (C) 2012 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Core/Win32/HardwareInfoImpl.hpp>
+#include <Nazara/Core/Error.hpp>
+#include <windows.h>
+
+#ifdef NAZARA_COMPILER_MSVC
+#include <intrin.h>
+#endif
+
+#include <Nazara/Core/Debug.hpp>
+
+void NzHardwareInfoImpl::Cpuid(nzUInt32 code, nzUInt32 result[4])
+{
+	#if defined(NAZARA_COMPILER_MSVC)
+	__cpuid(reinterpret_cast<int*>(result), static_cast<int>(code));
+	#elif defined(NAZARA_COMPILER_CLANG) || defined(NAZARA_COMPILER_GCC) || defined(NAZARA_COMPILER_INTEL)
+	// Source: http://stackoverflow.com/questions/1666093/cpuid-implementations-in-c
+	asm volatile
+	("cpuid"
+	 :"=a" (result[0]), "=b" (result[1]), "=c" (result[2]), "=d" (result[3])
+     :"a" (code), "c" (0));
+	#else
+	NazaraInternalError("Cpuid has been called although it is not supported");
+	#endif
+}
+
+unsigned int NzHardwareInfoImpl::GetProcessorCount()
+{
+	// Plus simple (et plus portable) que de passer par le CPUID
+	SYSTEM_INFO infos;
+	GetSystemInfo(&infos);
+
+	return infos.dwNumberOfProcessors;
+}
+
+bool NzHardwareInfoImpl::IsCpuidSupported()
+{
+	#if defined(NAZARA_COMPILER_MSVC)
+	int supported;
+	__asm
+	{
+		pushfd
+		pop	eax
+		mov	ecx,	eax
+		xor	eax,	0x200000
+		push	eax
+		popfd
+		pushfd
+		pop	eax
+		xor	eax,	ecx
+		mov	supported,	eax
+		push	ecx
+		popfd
+	};
+
+	return supported != 0;
+	#elif defined(NAZARA_COMPILER_CLANG) || defined(NAZARA_COMPILER_GCC) || defined(NAZARA_COMPILER_INTEL)
+	int supported;
+	asm volatile
+	("	pushfl\n"
+	 "  pop	%%eax\n"
+	 "	mov	%%eax,	%%ecx\n"
+	 "	xor	$0x200000,	%%eax\n"
+	 "	push	%%eax\n"
+	 "	popfl\n"
+	 "	pushfl\n"
+	 "	pop	%%eax\n"
+	 "	xor	%%ecx,	%%eax\n"
+	 "	mov	%%eax,	%0\n"
+	 "	push	%%ecx\n"
+	 "	popfl\n"
+	 : "=m" (supported)
+	 : :"eax", "ecx", "memory");
+
+	return supported != 0;
+	#else
+	return false;
+	#endif
+}