nfp: bpf: support arithmetic right shift by constant (BPF_ARSH | BPF_K)

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Code logic is similar with logic right shift except we also need to set
PREV_ALU result properly, the MSB of which is the bit that will be
replicated to fill in all the vacant positions.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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Jiong Wang 2018-05-18 12:12:10 -07:00 • committed by Daniel Borkmann

parent 991f5b3651

commit f43d0f17fe

2 changed files with 35 additions and 0 deletions

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34

drivers/net/ethernet/netronome/nfp/bpf/jit.c

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1

drivers/net/ethernet/netronome/nfp/nfp_asm.h

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