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How to identify what is my processor "Bits" programmatically.

mmanaskant
Beginner
‎08-07-2007 03:57 AM
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I have an Intel 64 bit processor but i have installed a 32 bit Operating system on it.

How should i find it out what "bits" my processor support? Windows API GetSystemInfor is unable to give me right results.

Thanks in advance

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Thomas_W_Intel
Employee
‎03-26-2008 04:05 PM
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You can use the cpuid instruction and check bit 29 in the EDX register for the Extended Feature Bits (Function 80000001h). See section 3.2.2 in Application Note 485 (http://download.intel.com/design/processor/applnots/24161832.pdf).

However, I do not see how this is related to Threading ;)

Best regards

Thomas

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