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How to get VFP support info about ARM processor

Andrei Baskakov
Note: This was originally posted on 5th April 2012 at http://forums.arm.com

Hello!

I have a device with a Marvell Kirkwood 88F6283 processor. Using cpuinfo I've managet to get the following

Processor    : Feroceon 88FR131 rev 1 (v5l)
BogoMIPS        : 992.87
Features        : swp half thumb fastmult edsp
CPU implementer : 0x56
CPU architecture: 5TE
CPU variant  : 0x2
CPU part        : 0x131
CPU revision    : 1

Hardware        : Feroceon-KW
Revision        : 0000
Serial          : 0000000000000000

Linux wtplug 2.6.31.8 #1 Tue Oct 25 14:30:37 FET 2011 armv5tel GNU/Linux



1. How can I understand if this processor supports VFP (hardware)?


2. What version of VFP - VFP/VFP2/VFP3 it implements?


3. What compiler flags do I need to specify to a gcc cross-compiler in order to generate VFP code?




The reason I am writing is that I've compiled a program which uses floating point multiplication and it results in a 'Invalid operation' exception on a VLDR instruction.


4. Do you know any reasons why I get such an exception on VLDR?




Thank you!