[arm] Add support for SMMLA, SMMLS and SMMUL.

src/arm/disasm-arm.cc

Index: src/arm/disasm-arm.cc
diff --git a/src/arm/disasm-arm.cc b/src/arm/disasm-arm.cc
index 85977b186e8a940558130f04c5f36d4ef32b005e..deaf552acc7e5c3388cd62c4b3f8d917ebca1699 100644
--- a/src/arm/disasm-arm.cc
+++ b/src/arm/disasm-arm.cc
@@ -1096,6 +1096,22 @@ void Decoder::DecodeType3(Instruction* instr) {
       break;
     }
     case db_x: {
+      if (instr->Bits(22, 20) == 0x5) {
+        if (instr->Bits(7, 4) == 0xd) {
+          // SMMLS (in V8 notation matching ARM ISA format)
+          Format(instr, "smmls'cond 'rn, 'rm, 'rs, 'rd");
+          break;
+        }
+        if (instr->Bits(7, 4) == 0x1) {
+          if (instr->Bits(15, 12) == 0xF) {
+            Format(instr, "smmul'cond 'rn, 'rm, 'rs");
+          } else {
+            // SMMLA (in V8 notation matching ARM ISA format)
+            Format(instr, "smmla'cond 'rn, 'rm, 'rs, 'rd");
+          }
+          break;
+        }
+      }
       if (FLAG_enable_sudiv) {
         if (instr->Bits(5, 4) == 0x1) {
           if ((instr->Bit(22) == 0x0) && (instr->Bit(20) == 0x1)) {