CPU flag

cat /proc/cpuinfo会出来很多cpu flag

要知道他们的具体含义,可以参考:

http://software.intel.com/sites/default/files/m/8/a/1/8/4/36945-319433-011.pdf

http://en.wikipedia.org/wiki/CPUID#EAX.3D1%3a_Processor_Info_and_Feature_Bits

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