tjh.dev
+25
-9
arch/loongarch/net/bpf_jit.c
+25
-9
arch/loongarch/net/bpf_jit.c
···
553
/* dst = dst / src */
554
case BPF_ALU | BPF_DIV | BPF_X:
555
case BPF_ALU64 | BPF_DIV | BPF_X:
556
-
emit_zext_32(ctx, dst, is32);
557
-
move_reg(ctx, t1, src);
558
-
emit_zext_32(ctx, t1, is32);
559
-
emit_insn(ctx, divdu, dst, dst, t1);
560
-
emit_zext_32(ctx, dst, is32);
561
break;
562
563
/* dst = dst / imm */
564
case BPF_ALU | BPF_DIV | BPF_K:
565
case BPF_ALU64 | BPF_DIV | BPF_K:
566
-
move_imm(ctx, t1, imm, is32);
567
-
emit_zext_32(ctx, dst, is32);
568
-
emit_insn(ctx, divdu, dst, dst, t1);
569
-
emit_zext_32(ctx, dst, is32);
570
break;
571
572
/* dst = dst % src */
···
553
/* dst = dst / src */
554
case BPF_ALU | BPF_DIV | BPF_X:
555
case BPF_ALU64 | BPF_DIV | BPF_X:
556
+
if (!off) {
557
+
emit_zext_32(ctx, dst, is32);
558
+
move_reg(ctx, t1, src);
559
+
emit_zext_32(ctx, t1, is32);
560
+
emit_insn(ctx, divdu, dst, dst, t1);
561
+
emit_zext_32(ctx, dst, is32);
562
+
} else {
563
+
emit_sext_32(ctx, dst, is32);
564
+
move_reg(ctx, t1, src);
565
+
emit_sext_32(ctx, t1, is32);
566
+
emit_insn(ctx, divd, dst, dst, t1);
567
+
emit_sext_32(ctx, dst, is32);
568
+
}
569
break;
570
571
/* dst = dst / imm */
572
case BPF_ALU | BPF_DIV | BPF_K:
573
case BPF_ALU64 | BPF_DIV | BPF_K:
574
+
if (!off) {
575
+
move_imm(ctx, t1, imm, is32);
576
+
emit_zext_32(ctx, dst, is32);
577
+
emit_insn(ctx, divdu, dst, dst, t1);
578
+
emit_zext_32(ctx, dst, is32);
579
+
} else {
580
+
move_imm(ctx, t1, imm, false);
581
+
emit_sext_32(ctx, t1, is32);
582
+
emit_sext_32(ctx, dst, is32);
583
+
emit_insn(ctx, divd, dst, dst, t1);
584
+
emit_sext_32(ctx, dst, is32);
585
+
}
586
break;
587
588
/* dst = dst % src */