s390: use new mul instruction

src/s390/disasm-s390.cc

Index: src/s390/disasm-s390.cc
diff --git a/src/s390/disasm-s390.cc b/src/s390/disasm-s390.cc
index 0f57915b2ae7968ed831eb857fa49e2c6296c2b9..51be2d35df8cea4d6b91a62dc08b4312a17e3ddf 100644
--- a/src/s390/disasm-s390.cc
+++ b/src/s390/disasm-s390.cc
@@ -775,6 +775,9 @@ bool Decoder::DecodeFourByte(Instruction* instr) {
     case MSR:
       Format(instr, "msr\t'r5,'r6");
       break;
+    case MSRKC:
+      Format(instr, "msrkc\t'r5,'r6,'r3");
+      break;
     case LGBR:
       Format(instr, "lgbr\t'r5,'r6");
       break;
@@ -784,6 +787,9 @@ bool Decoder::DecodeFourByte(Instruction* instr) {
     case MSGR:
       Format(instr, "msgr\t'r5,'r6");
       break;
+    case MSGRKC:
+      Format(instr, "msgrkc\t'r5,'r6,'r3");
+      break;
     case DSGR:
       Format(instr, "dsgr\t'r5,'r6");
       break;