LoongArch: BPF: Remove dead move_imm() call in BPF_NEG path

Browse source

The BPF_NEG operation is a unary operator that performs `dst = -dst`.
The current code unconditionally executes a move_imm() call before the
subtraction, generating useless JITted instructions to load data into
the temporary register `t1`. This `t1` register is never used anywhere
else in the entire BPF_NEG path.

Remove this dead `move_imm()` call to avoid useless instructions.

Acked-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

...

This commit is contained in:

Tiezhu Yang 2026-08-17 22:07:24 +08:00 • committed by Huacai Chen

parent 32a5e3eaa0

commit 252ae40ba9

1 changed files with 0 additions and 1 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

1

arch/loongarch/net/bpf_jit.c

View file