Jakub Kicinski 6c59500c2d nfp: bpf: optimize add/sub of a negative constant ... NFP instruction set can fit small immediates into the instruction. Negative integers, however, will never fit because they will have highest bit set. If we swap the ALU op between ADD and SUB and negate the constant we have a better chance of fitting small negative integers into the instruction itself and saving one or two cycles. immed[gprB_21, 0xfffffffc] alu[gprA_4, gprA_4, +, gprB_21], gpr_wrboth immed[gprB_21, 0xffffffff] alu[gprA_5, gprA_5, +carry, gprB_21], gpr_wrboth now becomes: alu[gprA_4, gprA_4, -, 4], gpr_wrboth alu[gprA_5, gprA_5, -carry, 0], gpr_wrboth Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>		2018-04-25 09:56:10 +02:00
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nfp	nfp: bpf: optimize add/sub of a negative constant	2018-04-25 09:56:10 +02:00
Kconfig	nfp: build the flower offload by default	2017-09-03 21:22:05 -07:00
Makefile	nfp: rename the driver and add new main file	2017-02-10 15:52:24 -05:00