[arm] Drop SMMLS support.

src/arm/simulator-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #include "src/v8.h"
 
@@ skipping 2693 matching lines @@
               }
               break;
           }
         }
         return;
       }
       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");
-          int rm = instr->RmValue();
-          int32_t rm_val = get_register(rm);
-          int rs = instr->RsValue();
-          int32_t rs_val = get_register(rs);
-          int rd = instr->RdValue();
-          int32_t rd_val = get_register(rd);
-          rn_val = base::bits::SignedMulHighAndSub32(rm_val, rs_val, rd_val);
-          set_register(rn, rn_val);
-          return;
-        }
         if (instr->Bits(7, 4) == 0x1) {
           int rm = instr->RmValue();
           int32_t rm_val = get_register(rm);
           int rs = instr->RsValue();
           int32_t rs_val = get_register(rs);
           if (instr->Bits(15, 12) == 0xF) {
             // SMMUL (in V8 notation matching ARM ISA format)
             // Format(instr, "smmul'cond 'rn, 'rm, 'rs");
             rn_val = base::bits::SignedMulHigh32(rm_val, rs_val);
           } else {
@@ skipping 1129 matching lines @@
   uintptr_t address = *stack_slot;
   set_register(sp, current_sp + sizeof(uintptr_t));
   return address;
 }
 
 } }  // namespace v8::internal
 
 #endif  // USE_SIMULATOR
 
 #endif  // V8_TARGET_ARCH_ARM