From mboxrd@z Thu Jan  1 00:00:00 1970
From: davem@davemloft.net (David Miller)
Date: Wed, 15 Mar 2017 14:55:12 -0700 (PDT)
Subject: arch: arm: bpf: Converting cBPF to eBPF for arm 32 bit
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From: Shubham Bansal <illusionist.neo@gmail.com>
Date: Wed, 15 Mar 2017 17:43:44 +0530

>> You can't truncate, but you'll have to build 64-bit ops using 32-bit registers.
> 
> A small example would help a lot.

You can simply perform 64-bit operations in C code and see what gcc
outputs for that code on this 32-bit target.