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| author | Hengqi Chen <hengqi.chen@gmail.com> | 2023-11-08 14:12:21 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-11-08 14:12:21 +0800 |
| commit | 7b6b13d32965ad7f1eb889d1a7058868a88eb29f (patch) | |
| tree | a20856d70a2bc7bf50200a5ce7bfd54b5e584f04 | |
| parent | 2425c9e002d2a1fdca34261b2fa6713eafef2163 (diff) | |
| download | linux-7b6b13d32965ad7f1eb889d1a7058868a88eb29f.tar.gz | |
LoongArch: BPF: Support signed mod instructions
Add support for signed mod instructions.
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
| -rw-r--r-- | arch/loongarch/net/bpf_jit.c | 34 |
1 files changed, 25 insertions, 9 deletions
diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c index 7c0d129b82a4a4..169ff8b3915e6c 100644 --- a/arch/loongarch/net/bpf_jit.c +++ b/arch/loongarch/net/bpf_jit.c @@ -588,20 +588,36 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx, bool ext /* dst = dst % src */ case BPF_ALU | BPF_MOD | BPF_X: case BPF_ALU64 | BPF_MOD | BPF_X: - emit_zext_32(ctx, dst, is32); - move_reg(ctx, t1, src); - emit_zext_32(ctx, t1, is32); - emit_insn(ctx, moddu, dst, dst, t1); - emit_zext_32(ctx, dst, is32); + if (!off) { + emit_zext_32(ctx, dst, is32); + move_reg(ctx, t1, src); + emit_zext_32(ctx, t1, is32); + emit_insn(ctx, moddu, dst, dst, t1); + emit_zext_32(ctx, dst, is32); + } else { + emit_sext_32(ctx, dst, is32); + move_reg(ctx, t1, src); + emit_sext_32(ctx, t1, is32); + emit_insn(ctx, modd, dst, dst, t1); + emit_sext_32(ctx, dst, is32); + } break; /* dst = dst % imm */ case BPF_ALU | BPF_MOD | BPF_K: case BPF_ALU64 | BPF_MOD | BPF_K: - move_imm(ctx, t1, imm, is32); - emit_zext_32(ctx, dst, is32); - emit_insn(ctx, moddu, dst, dst, t1); - emit_zext_32(ctx, dst, is32); + if (!off) { + move_imm(ctx, t1, imm, is32); + emit_zext_32(ctx, dst, is32); + emit_insn(ctx, moddu, dst, dst, t1); + emit_zext_32(ctx, dst, is32); + } else { + move_imm(ctx, t1, imm, false); + emit_sext_32(ctx, t1, is32); + emit_sext_32(ctx, dst, is32); + emit_insn(ctx, modd, dst, dst, t1); + emit_sext_32(ctx, dst, is32); + } break; /* dst = -dst */ |