/usr/include/avifile-0.7/avm_cpuinfo.h is in libavifile-0.7-dev 1:0.7.48~20090503.ds-20.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | #ifndef AVM_CPUINFO_H
#define AVM_CPUINFO_H
#include "avm_default.h"
AVM_BEGIN_NAMESPACE;
class CPU_Info
{
double freq;
bool have_tsc;
bool have_mmx;
bool have_mmxext;
bool have_sse;
public:
CPU_Info();
~CPU_Info();
void Init();
/**
* Returns nonzero if the processor supports MMX instruction set.
*/
bool HaveMMX() const {return have_mmx;}
/**
* Returns nonzero if the processor supports extended integer MMX instruction set
( Pentium-III, AMD Athlon and compatibles )
*/
bool HaveMMXEXT() const {return have_mmxext;}
/**
* Returns nonzero if the processor supports 'SSE' floating-point SIMD instruction set
( Pentium-III and compatibles )
*/
bool HaveSSE() const {return have_sse;}
/**
* Returns nonzero if the processor has time-stamp counter feature.
*/
bool HaveTSC() const {return have_tsc;}
/**
* Returns processor frequency in kHz.
*/
operator double() const {return freq;}
};
AVM_END_NAMESPACE;
extern AVMEXPORT avm::CPU_Info freq;
AVM_BEGIN_EXTERN_C;
static inline int avm_is_mmx_state()
{
#ifdef ARCH_X86
if (freq.HaveMMX())
{
unsigned short tagword = 0;
char b[28];
__asm__ __volatile__ ("fnstenv (%0)\n\t" : : "r"(&b));
tagword = *(unsigned short*) (b + 8);
return (tagword != 0xffff);
}
#endif
return 0;
}
#ifdef AVM_COMPATIBLE
/**
* Returns duration of time interval between two timestamps, received
* with longcount() in miliseconds
*/
static inline float to_float(int64_t tend, int64_t tbegin)
{
//return float((tend - tbegin) / (double)freq / 1000.);
return float((double)(tend - tbegin) / 4294.967296);
}
#endif
AVM_END_EXTERN_C;
#endif // AVM_CPUINFO_H
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