Tool or Process to check for AES-NI support on processor?

Question

In another question: How to choose a stream cipher, Thomas' answer mentioned the AES-NI instruction set, which piqued my curiousity.

Is there a tool or process available out there to check whether the instruction set is available (besides comparing CPU model numbers)?

EDIT: Did the google search with no luck, btw :)

Answer 1

On Linux systems, do :

grep flags /proc/cpuinfo

This will give, for each CPU core, the list of what that core can do. The AES-NI instructions are there when the flag "aes" appears in the list of flags. See this page for a list of possible flag values.

For Windows, see this question on SuperUser.

Answer 2

I'm not a low level hardware person any more, but an example from this post regarding a FreeBSD implemention shows you can grab info from Features2:

Features2=0x29ee3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,<b17>,DCA,SSE4.1,SSE4.2,POPCNT,AESNI>