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authorHengqi Chen <hengqi.chen@gmail.com>2023-11-08 14:12:21 +0800
committerHuacai Chen <chenhuacai@loongson.cn>2023-11-08 14:12:21 +0800
commit7b6b13d32965ad7f1eb889d1a7058868a88eb29f (patch)
treea20856d70a2bc7bf50200a5ce7bfd54b5e584f04 /arch
parent2425c9e002d2a1fdca34261b2fa6713eafef2163 (diff)
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/loongarch/net/bpf_jit.c34
1 files changed, 25 insertions, 9 deletions
diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c
index 7c0d129b82a4..169ff8b3915e 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 */