s390/bpf,jit: add support MOD instruction
Add support for MOD operation for s390's JIT.
Same as 280050cc "x86 bpf_jit: support MOD operation" for x86 which
adds JIT support for the generic new MOD operation introduced with
b6069a9570 "filter: add MOD operation".
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index 9b355b4..1ff9301 100644
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -341,6 +341,27 @@
/* lr %r5,%r4 */
EMIT2(0x1854);
break;
+ case BPF_S_ALU_MOD_X: /* A %= X */
+ jit->seen |= SEEN_XREG | SEEN_RET0;
+ /* ltr %r12,%r12 */
+ EMIT2(0x12cc);
+ /* jz <ret0> */
+ EMIT4_PCREL(0xa7840000, (jit->ret0_ip - jit->prg));
+ /* lhi %r4,0 */
+ EMIT4(0xa7480000);
+ /* dr %r4,%r12 */
+ EMIT2(0x1d4c);
+ /* lr %r5,%r4 */
+ EMIT2(0x1854);
+ break;
+ case BPF_S_ALU_MOD_K: /* A %= K */
+ /* lhi %r4,0 */
+ EMIT4(0xa7480000);
+ /* d %r4,<d(K)>(%r13) */
+ EMIT4_DISP(0x5d40d000, EMIT_CONST(K));
+ /* lr %r5,%r4 */
+ EMIT2(0x1854);
+ break;
case BPF_S_ALU_AND_X: /* A &= X */
jit->seen |= SEEN_XREG;
/* nr %r5,%r12 */