Checking CPU capabilities

[Mayuresh Kathe]

On 2019-02-02 11:33 PM, Chris Hill wrote:
> On Sat, 2 Feb 2019, Mayuresh Kathe wrote:
> 
>> On 2019-02-02 09:46 PM, Chris Hill wrote:
>>> On Sat, 2 Feb 2019, Mayuresh Kathe wrote:
>>> 
>>>> Under Linux it is `cat /proc/cpuinfo`
>>>> Under Solaris it is `isainfo -v`
>>>> What is it under FreeBSD 12?
>>> 
>>> Something like
>>>   $ grep Features /var/run/dmesg.boot
>>> ...or am I missing something?
>> 
>> I need to know if my processor supports AVX, AVX2, AVX-512, SIMD, etc.
>> Would your approach give me that sort of information?
> 
> I think it would. On one machine I get:
> $ grep Features /var/run/dmesg.boot | grep AVX
> 
> Features2=0x3d9ae3bf<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,POPCNT,TSCDLT,XSAVE,OSXSAVE,AVX,F16C>
> 
> ...and on another I get bupkis:
> $ grep Features /var/run/dmesg.boot | grep AVX
> $
> 
> So I gather that the first machine has AVX support and the second does 
> not.

Great. Thanks for that Chris.