Changed: #842 Removed obsolete files (all methods are already implemented in CSystemInfo)
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2 changed files with 0 additions and 196 deletions
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// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef NL_CPU_INFO_H
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#define NL_CPU_INFO_H
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#include "types_nl.h"
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namespace NLMISC {
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/**
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* This helps to know whether cpu has some features such as mmx, sse ...
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* \author Nicolas Vizerie
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* \author Nevrax France
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* \date 2001
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*/
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struct CCpuInfo___
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{
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/** test whether the cpuid instruction is supported
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* (always false on non intel architectures)
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*/
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static bool hasCPUID(void);
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/** helps to know whether the processor features mmx instruction set
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* This is initialized at startup, so it's fast
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* (always false on not 0x86 architecture ...)
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*/
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static bool hasMMX(void);
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/** helps to know whether the processor has streaming SIMD instructions (the OS must support it)
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* This is initialized at startup, so it's fast
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* (always false on not 0x86 architecture ...)
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*/
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static bool hasSSE(void);
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};
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} // NLMISC
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#endif // NL_CPU_INFO_H
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/* End of cpu_info.h */
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// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "stdmisc.h"
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#include "nel/misc/cpu_info.h"
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namespace NLMISC
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{
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static bool DetectMMX(void)
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{
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#ifdef NL_OS_WINDOWS
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if (!CCpuInfo___::hasCPUID()) return false; // cpuid not supported ...
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uint32 result = 0;
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__asm
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{
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mov eax,1
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cpuid
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test edx,0x800000 // bit 23 = MMX instruction set
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je noMMX
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mov result, 1
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noMMX:
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}
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return result == 1;
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// printf("mmx detected\n");
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#else
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return false;
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#endif
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}
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static bool DetectSSE()
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{
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#ifdef NL_OS_WINDOWS
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if (!CCpuInfo___::hasCPUID()) return false; // cpuid not supported ...
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uint32 result = 0;
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__asm
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{
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mov eax, 1 // request for feature flags
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cpuid
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test EDX, 002000000h // bit 25 in feature flags equal to 1
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je noSSE
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mov result, 1 // sse detected
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noSSE:
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}
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if (result)
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{
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// check OS support for SSE
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try
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{
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__asm
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{
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xorps xmm0, xmm0 // Streaming SIMD Extension
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}
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}
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catch(...)
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{
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return false;
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}
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// printf("sse detected\n");
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return true;
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}
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else
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{
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return false;
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}
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#else
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return false;
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#endif
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}
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bool HasMMX = DetectMMX();
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bool HasSSE = DetectSSE();
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bool CCpuInfo___::hasCPUID()
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{
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#ifdef NL_OS_WINDOWS
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uint32 result;
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__asm
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{
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pushad
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pushfd
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// If ID bit of EFLAGS can change, then cpuid is available
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pushfd
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pop eax // Get EFLAG
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mov ecx,eax
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xor eax,0x200000 // Flip ID bit
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push eax
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popfd // Write EFLAGS
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pushfd
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pop eax // read back EFLAG
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xor eax,ecx
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je noCpuid // no flip -> no CPUID instr.
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popfd // restore state
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popad
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mov result, 1
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jmp CPUIDPresent
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noCpuid:
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popfd // restore state
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popad
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mov result, 0
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CPUIDPresent:
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}
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return result == 1;
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#else
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return false;
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#endif
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}
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bool CCpuInfo___::hasMMX() { return HasMMX; }
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bool CCpuInfo___::hasSSE() { return HasSSE; }
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} // NLMISC
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