nfp: bpf: optimize comparisons to negative constants

Browse source

Comparison instruction requires a subtraction.  If the constant
is negative we are more likely to fit it into a NFP instruction
directly if we change the sign and use addition.

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

...

This commit is contained in:

Jakub Kicinski 2018-04-24 21:22:39 -07:00 • committed by Daniel Borkmann

parent 61dd8f0007

commit 7bdc97be90

2 changed files with 35 additions and 13 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

42

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

View file

6

drivers/net/ethernet/netronome/nfp/bpf/main.h

View file