From 7b6b13d32965ad7f1eb889d1a7058868a88eb29f Mon Sep 17 00:00:00 2001 From: Hengqi Chen Date: Wed, 8 Nov 2023 14:12:21 +0800 Subject: LoongArch: BPF: Support signed mod instructions Add support for signed mod instructions. Signed-off-by: Hengqi Chen Signed-off-by: Huacai Chen --- arch/loongarch/net/bpf_jit.c | 34 +++++++++++++++++++++++++--------- 1 file changed, 25 insertions(+), 9 deletions(-) (limited to 'arch/loongarch') 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 */ -- cgit v1.2.3