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Improved the cpu speed/ghz detection. It should be a bit more accurate, and is faster (pcsx2 startup times are near instantaneous now). 

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@1306 96395faa-99c1-11dd-bbfe-3dabce05a288
This commit is contained in:
Jake.Stine 2009-06-03 01:06:26 +00:00
parent 8c5b6ae749
commit 074a87eadc
1 changed files with 12 additions and 7 deletions
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19
pcsx2/x86/ix86/ix86_cpudetect.cpp
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@ -196,20 +196,20 @@ s64 CPUSpeedHz( int time )
// Align the cpu execution to a timeGetTime boundary.
// Without this the result could be skewed by up to several milliseconds.
do { timeStart = timeGetTime( );
do { timeStart = GetCPUTicks();
} while( timeGetTime( ) == timeStart );
do
{
timeStop = timeGetTime( );
timeStop = GetCPUTicks( );
startTick = GetCPUTick( );
} while( ( timeStop - timeStart ) < 1 );
} while( ( timeStop - timeStart ) == 0 );
timeStart = timeStop;
do
{
timeStop = timeGetTime();
timeStop = GetCPUTicks();
endTick = GetCPUTick();
}
while( ( timeStop - timeStart ) < time );
@ -364,10 +364,15 @@ void cpudetectInit()
cpucaps.hasAMD64BitArchitecture = ( cpuinfo.x86EFlags >> 29 ) & 1; //64bit cpu
cpucaps.has3DNOWInstructionExtensionsExt = ( cpuinfo.x86EFlags >> 30 ) & 1; //3dnow+
cpucaps.has3DNOWInstructionExtensions = ( cpuinfo.x86EFlags >> 31 ) & 1; //3dnow
cpucaps.hasStreamingSIMD4ExtensionsA = ( cpuinfo.x86EFlags2 >> 6 ) & 1; //INSERTQ / EXTRQ / MOVNT
cpucaps.hasStreamingSIMD4ExtensionsA = ( cpuinfo.x86EFlags2 >> 6 ) & 1; //INSERTQ / EXTRQ / MOVNT
InitCPUTicks();
uint span = GetTickFrequency();
cpuinfo.cpuspeed = (u32)(CPUSpeedHz( 400 ) / 400000 );
if( (span % 1000) < 400 ) // helps minimize rounding errors
cpuinfo.cpuspeed = (u32)( CPUSpeedHz( span / 1000 ) / 1000 );
else
cpuinfo.cpuspeed = (u32)( CPUSpeedHz( span / 500 ) / 2000 );
// --> SSE3 / SSSE3 / SSE4.1 / SSE 4.2 detection <--