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Changed: #842 Removed obsolete files (all methods are already implemented in CSystemInfo)

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kervala 2010-06-26 14:50:03 +02:00
parent d308968f9a
commit 870fb2a50a
2 changed files with 0 additions and 196 deletions
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58
code/nel/include/nel/misc/cpu_info.h
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@ -1,58 +0,0 @@
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef NL_CPU_INFO_H
#define NL_CPU_INFO_H
#include "types_nl.h"
namespace NLMISC {
/**
* This helps to know whether cpu has some features such as mmx, sse ...
* \author Nicolas Vizerie
* \author Nevrax France
* \date 2001
*/
struct CCpuInfo___
{
/** test whether the cpuid instruction is supported
* (always false on non intel architectures)
*/
static bool hasCPUID(void);
/** helps to know whether the processor features mmx instruction set
* This is initialized at startup, so it's fast
* (always false on not 0x86 architecture ...)
*/
static bool hasMMX(void);
/** helps to know whether the processor has streaming SIMD instructions (the OS must support it)
* This is initialized at startup, so it's fast
* (always false on not 0x86 architecture ...)
*/
static bool hasSSE(void);
};
} // NLMISC
#endif // NL_CPU_INFO_H
/* End of cpu_info.h */

138
code/nel/src/misc/cpu_info.cpp
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// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "stdmisc.h"
#include "nel/misc/cpu_info.h"
namespace NLMISC
{
static bool DetectMMX(void)
{
#ifdef NL_OS_WINDOWS
if (!CCpuInfo___::hasCPUID()) return false; // cpuid not supported ...
uint32 result = 0;
__asm
{
mov eax,1
cpuid
test edx,0x800000 // bit 23 = MMX instruction set
je noMMX
mov result, 1
noMMX:
}
return result == 1;
// printf("mmx detected\n");
#else
return false;
#endif
}
static bool DetectSSE()
{
#ifdef NL_OS_WINDOWS
if (!CCpuInfo___::hasCPUID()) return false; // cpuid not supported ...
uint32 result = 0;
__asm
{
mov eax, 1 // request for feature flags
cpuid
test EDX, 002000000h // bit 25 in feature flags equal to 1
je noSSE
mov result, 1 // sse detected
noSSE:
}
if (result)
{
// check OS support for SSE
try
{
__asm
{
xorps xmm0, xmm0 // Streaming SIMD Extension
}
}
catch(...)
{
return false;
}
// printf("sse detected\n");
return true;
}
else
{
return false;
}
#else
return false;
#endif
}
bool HasMMX = DetectMMX();
bool HasSSE = DetectSSE();
bool CCpuInfo___::hasCPUID()
{
#ifdef NL_OS_WINDOWS
uint32 result;
__asm
{
pushad
pushfd
// If ID bit of EFLAGS can change, then cpuid is available
pushfd
pop eax // Get EFLAG
mov ecx,eax
xor eax,0x200000 // Flip ID bit
push eax
popfd // Write EFLAGS
pushfd
pop eax // read back EFLAG
xor eax,ecx
je noCpuid // no flip -> no CPUID instr.
popfd // restore state
popad
mov result, 1
jmp CPUIDPresent
noCpuid:
popfd // restore state
popad
mov result, 0
CPUIDPresent:
}
return result == 1;
#else
return false;
#endif
}
bool CCpuInfo___::hasMMX() { return HasMMX; }
bool CCpuInfo___::hasSSE() { return HasSSE; }
} // NLMISC