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Author SHA1 Message Date
Jim Lin 50f5cef391 [BPF] Implement mod operation 
Implement BPF_MOD instruction to fix lack of assembly parser support mentioned in https://github.com/llvm/llvm-project/issues/55192.

Reviewed By: ast

Differential Revision: https://reviews.llvm.org/D125207
 2022-05-12 10:59:18 +08:00
Yonghong Song 6b8baf3062 [BPF] turn on -mattr=+alu32 for cpu version v3 and later 
-mattr=+alu32 has shown good performance vs. without this attribute.
Based on discussion at
  https://lore.kernel.org/bpf/1ec37838-966f-ec0b-5223-ca9b6eb0860d@fb.com/T/#t
cpu version v3 should support -mattr=+alu32.
This patch enabled alu32 if cpu version is v3, either specified by user
or probed by the llvm.

Differential Revision: https://reviews.llvm.org/D69957
 2019-11-07 22:08:46 -08:00
Yonghong Song c4ca879fac bpf: New codegen testcases for 32-bit subregister support 
This patch adds some unit tests for 32-bit subregister support.
We want to make sure ALU32, subregister load/store and new peephole
optimization are truely enabled once -mattr=+alu32 specified.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Yonghong Song <yhs@fb.com>
llvm-svn: 325992
 2018-02-23 23:49:33 +00:00