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| author | Tiezhu Yang <yangtiezhu@loongson.cn> | 2025-10-02 22:39:35 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2025-10-02 22:39:35 +0800 |
| commit | 24ff0347bbfda1cee9b4aca29c8eeb1a2b7bd61e (patch) | |
| tree | 0f0bfdb7eaeed4bd151591d08bdbec6e82c55355 /tools/docs/parse-headers.py | |
| parent | db740f5689e61f2e75b73e5c8e7c985a3b4bc045 (diff) | |
LoongArch: BPF: Optimize sign-extention mov instructions
For 8-bit and 16-bit sign-extention mov instructions, it can use the
native instructions ext.w.b and ext.w.h directly, no need to use the
temporary t1 register, just remove the redundant operations.
Here are the test results:
# modprobe test_bpf test_range=81,84
# dmesg -t | tail -5
test_bpf: #81 ALU_MOVSX | BPF_B jited:1 5 PASS
test_bpf: #82 ALU_MOVSX | BPF_H jited:1 5 PASS
test_bpf: #83 ALU64_MOVSX | BPF_B jited:1 5 PASS
test_bpf: #84 ALU64_MOVSX | BPF_H jited:1 5 PASS
test_bpf: Summary: 4 PASSED, 0 FAILED, [4/4 JIT'ed]
Acked-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'tools/docs/parse-headers.py')
0 files changed, 0 insertions, 0 deletions