From 0ea5fc66924303d1bf73ba283a383e2aadee02f2 Mon Sep 17 00:00:00 2001 From: neodarz Date: Sat, 11 Aug 2018 20:21:34 +0200 Subject: Initial commit --- docs/doxygen/nel/a02421.html | 179 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 179 insertions(+) create mode 100644 docs/doxygen/nel/a02421.html (limited to 'docs/doxygen/nel/a02421.html') diff --git a/docs/doxygen/nel/a02421.html b/docs/doxygen/nel/a02421.html new file mode 100644 index 00000000..e00ae963 --- /dev/null +++ b/docs/doxygen/nel/a02421.html @@ -0,0 +1,179 @@ + + +NeL: NLMISC::CCpuInfo___ struct Reference + + + +
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+

NLMISC::CCpuInfo___ Struct Reference

#include <cpu_info.h> +

+

Detailed Description

+This helps to know wether cpu has some features such as mmx, sse ...
Author:
Nicolas Vizerie

+Nevrax France

+
Date:
2001
+ +

+ +

+Definition at line 41 of file cpu_info.h. + + + + + + + + +

Static Public Member Functions

bool hasCPUID (void)
bool hasMMX (void)
bool hasSSE (void)
+

Member Function Documentation

+

+ + + + +
+ + + + + + + + + + +
bool NLMISC::CCpuInfo___::hasCPUID ( void   )  [static]
+
+ + + + + +
+   + + +

+test wether the cpuid instruction is supported (always false on non intel architectures) +

+Definition at line 108 of file cpu_info.cpp. +

+References uint32. +

+

00109 {
+00110         #ifdef NL_OS_WINDOWS
+00111                  uint32 result;
+00112                  __asm
+00113                  {
+00114                          pushad
+00115                          pushfd                                         
+00116                          //      If ID bit of EFLAGS can change, then cpuid is available
+00117                          pushfd
+00118                          pop  eax                                       // Get EFLAG
+00119                          mov  ecx,eax
+00120                          xor  eax,0x200000                      // Flip ID bit
+00121                          push eax
+00122                          popfd                                          // Write EFLAGS
+00123                          pushfd      
+00124                          pop  eax                                       // read back EFLAG
+00125                          xor  eax,ecx                           
+00126                          je   noCpuid                           // no flip -> no CPUID instr.
+00127                          
+00128                          popfd                                          // restore state
+00129                          popad
+00130                          mov  result, 1
+00131                          jmp  CPUIDPresent
+00132                 
+00133                         noCpuid:
+00134                          popfd                                      // restore state
+00135                          popad
+00136                          mov result, 0
+00137                         CPUIDPresent:    
+00138                  }
+00139                  return result == 1;
+00140         #else
+00141                  return false;
+00142         #endif
+00143 }
+
+

+ + + + +
+ + + + + + + + + + +
bool NLMISC::CCpuInfo___::hasMMX ( void   )  [static]
+
+ + + + + +
+   + + +

+helps to know wether the processor features mmx instruction set This is initialized at started, so its fast (always false on not 0x86 architecture ...) +

+Definition at line 144 of file cpu_info.cpp. +

+References NLMISC::HasMMX. +

+

00144 { return HasMMX; }
+
+

+ + + + +
+ + + + + + + + + + +
bool NLMISC::CCpuInfo___::hasSSE ( void   )  [static]
+
+ + + + + +
+   + + +

+helps to know wether the processor has streaming SIMD instructions (the OS must supports it) This is initialized at started, so its fast (always false on not 0x86 architecture ...) +

+Definition at line 145 of file cpu_info.cpp. +

+References NLMISC::HasSSE. +

+

00145 { return HasSSE; }
+
+

The documentation for this struct was generated from the following files: +
Generated on Tue Mar 16 13:07:09 2004 for NeL by + +doxygen +1.3.6
+ + -- cgit v1.2.1